fix(voice-materials): 修复useVoiceMaterialActions的types相对路径层级

fix(MaterialForm): 修复TagSelector相对路径引用错误
refactor(voice-materials): 拆分MaterialForm为子组件（186→108行, -42%）
2026-07-28 13:42:31 +08:00 · 2026-07-28 13:38:19 +08:00 · 2026-07-28 13:31:05 +08:00 · 2026-07-28 13:23:29 +08:00 · 2026-07-28 13:09:11 +08:00 · 2026-07-28 13:08:00 +08:00
101 changed files with 14583 additions and 3989 deletions
@@ -0,0 +1,110 @@
+import React from "react"
+import type { MediaAsset } from "@/api/template-editor"
+import { MATERIAL_TYPE_LABELS, MATERIAL_TYPE_ICONS } from "@/api/template-editor"
+import { formatSize, formatDuration, getQualityLevel } from "./utils"
+
+interface AssetCardProps {
+  asset: MediaAsset
+  isSelected: boolean
+  isDragging: boolean
+  isDragOver: boolean
+  showCheckbox: boolean
+  compact?: boolean
+  onToggleSelect: (asset: MediaAsset, shiftKey: boolean) => void
+  onCardClick: (asset: MediaAsset, e: React.MouseEvent) => void
+  onDragStart: (e: React.DragEvent) => void
+  onDragOver: (e: React.DragEvent) => void
+  onDrop: (e: React.DragEvent) => void
+  onDragEnd: () => void
+  onMouseEnter: (e: React.MouseEvent) => void
+  onMouseLeave: () => void
+}
+
+const AssetCard: React.FC<AssetCardProps> = ({
+  asset,
+  isSelected,
+  isDragging,
+  isDragOver,
+  showCheckbox,
+  onToggleSelect,
+  onCardClick,
+  onDragStart,
+  onDragOver,
+  onDrop,
+  onDragEnd,
+  onMouseEnter,
+  onMouseLeave,
+}) => {
+  const qualityLevel = getQualityLevel(asset.quality_score)
+
+  return (
+    <div
+      className={[
+        "as-card",
+        isSelected ? "selected" : "",
+        isDragging ? "dragging" : "",
+        isDragOver ? "drag-over" : "",
+        showCheckbox ? "has-checkbox" : "",
+      ]
+        .filter(Boolean)
+        .join(" ")}
+      draggable
+      onDragStart={onDragStart}
+      onDragOver={onDragOver}
+      onDrop={onDrop}
+      onDragEnd={onDragEnd}
+      onClick={(e) => onCardClick(asset, e)}
+      onMouseEnter={onMouseEnter}
+      onMouseLeave={onMouseLeave}
+    >
+      {/* 缩略图 */}
+      <div className="as-card-thumb">
+        {asset.thumbnail_url ? (
+          <img src={asset.thumbnail_url} alt={asset.name} loading="lazy" />
+        ) : (
+          <span className="as-card-thumb-icon">{MATERIAL_TYPE_ICONS[asset.type]}</span>
+        )}
+
+        {/* Checkbox */}
+        {showCheckbox && (
+          <span
+            data-checkbox
+            className={`as-card-checkbox${isSelected ? " checked" : ""}`}
+            onClick={(e) => {
+              e.stopPropagation()
+              onToggleSelect(asset, e.shiftKey)
+            }}
+          />
+        )}
+
+        {/* 类型角标 */}
+        <span className="as-card-type-badge">{MATERIAL_TYPE_LABELS[asset.type]}</span>
+
+        {/* 时长角标 */}
+        {asset.duration != null && (
+          <span className="as-card-duration">{formatDuration(asset.duration)}</span>
+        )}
+
+        {/* 质量分角标 */}
+        {asset.quality_score != null && (
+          <span
+            className={`as-card-quality ${qualityLevel}`}
+            title={`质量分: ${asset.quality_score}`}
+          >
+            {asset.quality_score}
+          </span>
+        )}
+      </div>
+
+      {/* 信息 */}
+      <div className="as-card-info">
+        <p className="as-card-name" title={asset.name}>
+          {asset.name}
+        </p>
+        <div className="as-card-meta">{formatSize(asset.size)}</div>
+      </div>
+    </div>
+  )
+}
+
+export default AssetCard
@@ -0,0 +1,99 @@
+import React from "react"
+import type { MediaAsset } from "@/api/template-editor"
+import { MATERIAL_TYPE_LABELS, MATERIAL_TYPE_ICONS } from "@/api/template-editor"
+import { formatSize, formatDuration, getQualityColor } from "./utils"
+
+interface AssetListItemProps {
+  asset: MediaAsset
+  isSelected: boolean
+  isDragging: boolean
+  isDragOver: boolean
+  showCheckbox: boolean
+  onToggleSelect: (asset: MediaAsset, shiftKey: boolean) => void
+  onCardClick: (asset: MediaAsset, e: React.MouseEvent) => void
+  onDragStart: (e: React.DragEvent) => void
+  onDragOver: (e: React.DragEvent) => void
+  onDrop: (e: React.DragEvent) => void
+  onDragEnd: () => void
+  onMouseEnter: (e: React.MouseEvent) => void
+  onMouseLeave: () => void
+}
+
+const AssetListItem: React.FC<AssetListItemProps> = ({
+  asset,
+  isSelected,
+  isDragging,
+  isDragOver,
+  showCheckbox,
+  onToggleSelect,
+  onCardClick,
+  onDragStart,
+  onDragOver,
+  onDrop,
+  onDragEnd,
+  onMouseEnter,
+  onMouseLeave,
+}) => {
+  return (
+    <div
+      className={[
+        "as-list-item",
+        isSelected ? "selected" : "",
+        isDragging ? "dragging" : "",
+        isDragOver ? "drag-over" : "",
+      ]
+        .filter(Boolean)
+        .join(" ")}
+      draggable
+      onDragStart={onDragStart}
+      onDragOver={onDragOver}
+      onDrop={onDrop}
+      onDragEnd={onDragEnd}
+      onClick={(e) => onCardClick(asset, e)}
+      onMouseEnter={onMouseEnter}
+      onMouseLeave={onMouseLeave}
+    >
+      {/* 拖拽手柄 */}
+      <span className="as-list-item-drag" title="拖拽排序">
+        ⠿
+      </span>
+
+      {/* Checkbox */}
+      {showCheckbox && (
+        <span
+          data-checkbox
+          className={`as-list-item-checkbox${isSelected ? " checked" : ""}`}
+          onClick={(e) => {
+            e.stopPropagation()
+            onToggleSelect(asset, e.shiftKey)
+          }}
+        />
+      )}
+
+      {/* 图标 */}
+      <span className="as-list-item-icon">{MATERIAL_TYPE_ICONS[asset.type]}</span>
+
+      {/* 信息 */}
+      <div className="as-list-item-info">
+        <div className="as-list-item-name">{asset.name}</div>
+        <div className="as-list-item-meta">
+          {MATERIAL_TYPE_LABELS[asset.type]}
+          {asset.duration != null && ` · ${formatDuration(asset.duration)}`}
+          {asset.size != null && ` · ${formatSize(asset.size)}`}
+        </div>
+      </div>
+
+      {/* 质量分 */}
+      {asset.quality_score != null && (
+        <span
+          className="as-list-item-quality"
+          style={{ color: getQualityColor(asset.quality_score) }}
+        >
+          {asset.quality_score}分
+        </span>
+      )}
+    </div>
+  )
+}
+
+export default AssetListItem
@@ -9,73 +9,20 @@
 * - 筛选增强：类型筛选 + 质量分筛选
 * - 视图切换：网格视图 / 列表视图
 */
-import React, { useState, useMemo, useCallback, useRef, useEffect } from "react"
+import React, { useCallback } from "react"
 import "./AssetSelector.css"
-import { Input, Select, Button } from "@/components/ui"
+import type { AssetSelectorProps } from "./types"
+import useAssetFilter from "./hooks/useAssetFilter"
+import useAssetSelection from "./hooks/useAssetSelection"
+import useDragReorder from "./hooks/useDragReorder"
+import useAssetPreview from "./hooks/useAssetPreview"
+import SelectorToolbar from "./SelectorToolbar"
+import SelectorBatchBar from "./SelectorBatchBar"
+import AssetCard from "./AssetCard"
+import AssetListItem from "./AssetListItem"
+import PreviewOverlay from "./PreviewOverlay"
+import EmptyState from "./EmptyState"
 import type { MediaAsset } from "@/api/template-editor"
-import { MATERIAL_TYPE_LABELS, MATERIAL_TYPE_ICONS, QUALITY_OPTIONS } from "@/api/template-editor"
-
-/* ──────────── 类型 ──────────── */
-
-export interface AssetSelectorProps {
-  assets: MediaAsset[]
-  selectedIds?: string[]
-  onSelectionChange?: (ids: string[]) => void
-  onAssetDragStart?: (asset: MediaAsset) => void
-  onReorder?: (fromIdx: number, toIdx: number) => void
-  showQualityFilter?: boolean
-  showBatchSelect?: boolean
-  compact?: boolean
-}
-
-type ViewMode = "grid" | "list"
-
-/* ──────────── 工具函数 ──────────── */
-
-/** 格式化文件大小 */
-const formatSize = (bytes?: number): string => {
-  if (!bytes) return ""
-  if (bytes < 1024) return `${bytes}B`
-  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)}KB`
-  return `${(bytes / (1024 * 1024)).toFixed(1)}MB`
-}
-
-/** 格式化时长 */
-const formatDuration = (seconds?: number): string => {
-  if (!seconds) return ""
-  const m = Math.floor(seconds / 60)
-  const s = Math.floor(seconds % 60)
-  return m > 0 ? `${m}:${s.toString().padStart(2, "0")}` : `${s}s`
-}
-
-/** 获取质量分等级 */
-const getQualityLevel = (score?: number): string => {
-  if (score == null) return "none"
-  if (score >= 90) return "excellent"
-  if (score >= 70) return "good"
-  if (score >= 50) return "fair"
-  return "poor"
-}
-
-/** 质量分颜色 */
-const getQualityColor = (score?: number): string => {
-  if (score == null) return "var(--text-secondary)"
-  if (score >= 90) return "var(--success-color, #10b981)"
-  if (score >= 70) return "var(--primary-color, #6366f1)"
-  if (score >= 50) return "var(--warning-color, #f59e0b)"
-  return "var(--error-color, #ef4444)"
-}
-
-/* ──────────── 类型筛选选项 ──────────── */
-
-const TYPE_OPTIONS = [
-  { value: "", label: "全部类型" },
-  { value: "video", label: "🎬 视频" },
-  { value: "image", label: "🖼️ 图片" },
-  { value: "audio", label: "🎵 音频" },
-]
-
-/* ──────────── 组件 ──────────── */

 const AssetSelector: React.FC<AssetSelectorProps> = ({
  assets,
@@ -87,162 +34,41 @@ const AssetSelector: React.FC<AssetSelectorProps> = ({
  showBatchSelect = true,
  compact = false,
 }) => {
-  /* ── 搜索 & 筛选 ── */
-  const [searchText, setSearchText] = useState("")
-  const [filterType, setFilterType] = useState("")
-  const [filterQuality, setFilterQuality] = useState("")
-  const [viewMode, setViewMode] = useState<ViewMode>("grid")
+  // 搜索 & 筛选
+  const {
+    searchText,
+    filterType,
+    filterQuality,
+    viewMode,
+    filteredAssets,
+    setSearchText,
+    setFilterType,
+    setFilterQuality,
+    setViewMode,
+  } = useAssetFilter(assets)

-  /* ── 拖拽状态 ── */
-  const [dragIdx, setDragIdx] = useState<number | null>(null)
-  const [dragOverIdx, setDragOverIdx] = useState<number | null>(null)
+  // 选中操作
+  const { selectedSet, toggleSelect, clearSelection } = useAssetSelection({
+    filteredAssets,
+    selectedIds,
+    onSelectionChange,
+  })

-  /* ── 悬浮预览 ── */
-  const [previewAsset, setPreviewAsset] = useState<MediaAsset | null>(null)
-  const [previewPos, setPreviewPos] = useState({ x: 0, y: 0 })
-  const previewTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
+  // 拖拽排序
+  const { dragIdx, dragOverIdx, handleDragStart, handleDragOver, handleDrop, handleDragEnd } =
+    useDragReorder({
+      filteredAssets,
+      selectedIds,
+      onAssetDragStart,
+      onReorder,
+    })

-  /* ── Shift 连选 ── */
-  const lastClickedIdx = useRef<number | null>(null)
-
-  /* ── 过滤后的素材列表 ── */
-  const filteredAssets = useMemo(() => {
-    let list = assets
-    if (searchText) {
-      const q = searchText.toLowerCase()
-      list = list.filter(
-        (a) => a.name.toLowerCase().includes(q) || a.tags.some((t) => t.toLowerCase().includes(q)),
-      )
-    }
-    if (filterType) {
-      list = list.filter((a) => a.type === filterType)
-    }
-    if (filterQuality) {
-      const opt = QUALITY_OPTIONS.find((o) => o.value === filterQuality)
-      if (opt?.min != null && opt?.max != null) {
-        list = list.filter(
-          (a) =>
-            a.quality_score != null && a.quality_score >= opt.min! && a.quality_score <= opt.max!,
-        )
-      }
-    }
-    return list
-  }, [assets, searchText, filterType, filterQuality])
-
-  /* ── 选中状态 ── */
-  const selectedSet = useMemo(() => new Set(selectedIds), [selectedIds])
-
-  /* ── 选择操作 ── */
-  const toggleSelect = useCallback(
-    (asset: MediaAsset, idx: number, shiftKey: boolean) => {
-      if (!onSelectionChange) return
-
-      if (shiftKey && lastClickedIdx.current !== null) {
-        // Shift 连选
-        const start = Math.min(lastClickedIdx.current, idx)
-        const end = Math.max(lastClickedIdx.current, idx)
-        const rangeIds = filteredAssets.slice(start, end + 1).map((a) => a.id)
-        const newSet = new Set(selectedIds)
-        rangeIds.forEach((id) => newSet.add(id))
-        onSelectionChange(Array.from(newSet))
-      } else {
-        const newSet = new Set(selectedIds)
-        if (newSet.has(asset.id)) {
-          newSet.delete(asset.id)
-        } else {
-          newSet.add(asset.id)
-        }
-        onSelectionChange(Array.from(newSet))
-      }
-      lastClickedIdx.current = idx
-    },
-    [onSelectionChange, selectedIds, filteredAssets],
-  )
-
-  const clearSelection = useCallback(() => {
-    onSelectionChange?.([])
-  }, [onSelectionChange])
-
-  /* ── 拖拽排序 ── */
-  const handleDragStart = useCallback(
-    (e: React.DragEvent, idx: number) => {
-      setDragIdx(idx)
-      e.dataTransfer.effectAllowed = "move"
-      e.dataTransfer.setData("text/plain", String(idx))
-      // 设置素材数据，供 TimelinePanel 接收（P1-2 修复）
-      e.dataTransfer.setData("application/x-media-asset", JSON.stringify(filteredAssets[idx]))
-      // 批量拖拽：如果有多个选中素材，一起携带
-      if (selectedIds.length > 1 && selectedIds.includes(filteredAssets[idx].id)) {
-        const batchAssets = filteredAssets.filter((a) => selectedIds.includes(a.id))
-        e.dataTransfer.setData("application/x-media-assets", JSON.stringify(batchAssets))
-      }
-      // 通知父组件素材拖拽开始
-      if (onAssetDragStart) {
-        onAssetDragStart(filteredAssets[idx])
-      }
-    },
-    [filteredAssets, selectedIds, onAssetDragStart],
-  )
-
-  const handleDragOver = useCallback(
-    (e: React.DragEvent, idx: number) => {
-      e.preventDefault()
-      e.dataTransfer.dropEffect = "move"
-      if (dragIdx === null || dragIdx === idx) return
-      setDragOverIdx(idx)
-    },
-    [dragIdx],
-  )
-
-  const handleDrop = useCallback(
-    (e: React.DragEvent, toIdx: number) => {
-      e.preventDefault()
-      if (dragIdx !== null && dragIdx !== toIdx && onReorder) {
-        onReorder(dragIdx, toIdx)
-      }
-      setDragIdx(null)
-      setDragOverIdx(null)
-    },
-    [dragIdx, onReorder],
-  )
-
-  const handleDragEnd = useCallback(() => {
-    setDragIdx(null)
-    setDragOverIdx(null)
-  }, [])
-
-  /* ── 悬浮预览 ── */
-  const handleMouseEnter = useCallback((asset: MediaAsset, e: React.MouseEvent) => {
-    if (previewTimer.current) clearTimeout(previewTimer.current)
-    previewTimer.current = setTimeout(() => {
-      const rect = (e.currentTarget as HTMLElement).getBoundingClientRect()
-      setPreviewAsset(asset)
-      setPreviewPos({
-        x: rect.right + 12,
-        y: Math.max(8, rect.top - 20),
-      })
-    }, 400)
-  }, [])
-
-  const handleMouseLeave = useCallback(() => {
-    if (previewTimer.current) {
-      clearTimeout(previewTimer.current)
-      previewTimer.current = null
-    }
-    setPreviewAsset(null)
-  }, [])
-
-  // 清理定时器
-  useEffect(() => {
-    return () => {
-      if (previewTimer.current) clearTimeout(previewTimer.current)
-    }
-  }, [])
+  // 悬浮预览
+  const { previewAsset, previewPos, handleMouseEnter, handleMouseLeave } = useAssetPreview()

  /* ── 点击卡片 ── */
  const handleCardClick = useCallback(
    (asset: MediaAsset, idx: number, e: React.MouseEvent) => {
-      // 如果点击的是 checkbox 区域，不触发卡片点击
      const target = e.target as HTMLElement
      if (target.closest("[data-checkbox]")) return
      toggleSelect(asset, idx, e.shiftKey)
@@ -250,253 +76,82 @@ const AssetSelector: React.FC<AssetSelectorProps> = ({
    [toggleSelect],
  )

-  /* ──────────── 渲染 ──────────── */
-
  const hasSelection = selectedIds.length > 0

  return (
    <div className="as-container">
-      {/* ═══ 工具栏 ═══ */}
-      <div className="as-toolbar">
-        <div className="as-toolbar-left">
-          <div className="as-search">
-            <Input
-              placeholder="搜索素材..."
-              value={searchText}
-              onChange={(e) => setSearchText(e.target.value)}
-              prefix="🔍"
-            />
-          </div>
-          <Select
-            value={filterType}
-            onChange={(v: string) => setFilterType(v)}
-            options={TYPE_OPTIONS}
-          />
-          {showQualityFilter && (
-            <Select
-              value={filterQuality}
-              onChange={(v: string) => setFilterQuality(v)}
-              options={QUALITY_OPTIONS}
-            />
-          )}
-        </div>
-        <div className="as-toolbar-right">
-          <button
-            className={`as-view-btn${viewMode === "grid" ? " active" : ""}`}
-            onClick={() => setViewMode("grid")}
-            title="网格视图"
-          >
-            ⊞
-          </button>
-          <button
-            className={`as-view-btn${viewMode === "list" ? " active" : ""}`}
-            onClick={() => setViewMode("list")}
-            title="列表视图"
-          >
-            ☰
-          </button>
-        </div>
-      </div>
+      {/* 工具栏 */}
+      <SelectorToolbar
+        searchText={searchText}
+        filterType={filterType}
+        filterQuality={filterQuality}
+        viewMode={viewMode}
+        showQualityFilter={showQualityFilter}
+        onSearchChange={setSearchText}
+        onTypeChange={setFilterType}
+        onQualityChange={setFilterQuality}
+        onViewModeChange={setViewMode}
+      />

-      {/* ═══ 批量操作栏 ═══ */}
+      {/* 批量操作栏 */}
      {showBatchSelect && hasSelection && (
-        <div className="as-batch-bar">
-          <span className="as-batch-bar-count">已选 {selectedIds.length} 项</span>
-          <div className="as-batch-bar-actions">
-            <Button buttonType="ghost" buttonSize="sm" onClick={clearSelection}>
-              取消选择
-            </Button>
-          </div>
-        </div>
+        <SelectorBatchBar selectedCount={selectedIds.length} onClear={clearSelection} />
      )}

-      {/* ═══ 素材列表 ═══ */}
+      {/* 素材列表 */}
      <div className="as-body">
        {filteredAssets.length === 0 ? (
-          <div className="as-empty">
-            <div className="as-empty-icon">📂</div>
-            <p>暂无素材</p>
-          </div>
+          <EmptyState />
        ) : viewMode === "grid" ? (
-          /* ── 网格视图 ── */
+          /* 网格视图 */
          <div className={`as-grid${compact ? " compact" : ""}`}>
-            {filteredAssets.map((asset, idx) => {
-              const isSelected = selectedSet.has(asset.id)
-              const isDragging = dragIdx === idx
-              const isDragOver = dragOverIdx === idx
-              const qualityLevel = getQualityLevel(asset.quality_score)
-
-              return (
-                <div
-                  key={asset.id}
-                  className={[
-                    "as-card",
-                    isSelected ? "selected" : "",
-                    isDragging ? "dragging" : "",
-                    isDragOver ? "drag-over" : "",
-                    showBatchSelect ? "has-checkbox" : "",
-                  ]
-                    .filter(Boolean)
-                    .join(" ")}
-                  draggable
-                  onDragStart={(e) => handleDragStart(e, idx)}
-                  onDragOver={(e) => handleDragOver(e, idx)}
-                  onDrop={(e) => handleDrop(e, idx)}
-                  onDragEnd={handleDragEnd}
-                  onClick={(e) => handleCardClick(asset, idx, e)}
-                  onMouseEnter={(e) => handleMouseEnter(asset, e)}
-                  onMouseLeave={handleMouseLeave}
-                >
-                  {/* 缩略图 */}
-                  <div className="as-card-thumb">
-                    {asset.thumbnail_url ? (
-                      <img src={asset.thumbnail_url} alt={asset.name} loading="lazy" />
-                    ) : (
-                      <span className="as-card-thumb-icon">{MATERIAL_TYPE_ICONS[asset.type]}</span>
-                    )}
-
-                    {/* Checkbox */}
-                    {showBatchSelect && (
-                      <span
-                        data-checkbox
-                        className={`as-card-checkbox${isSelected ? " checked" : ""}`}
-                        onClick={(e) => {
-                          e.stopPropagation()
-                          toggleSelect(asset, idx, e.shiftKey)
-                        }}
-                      />
-                    )}
-
-                    {/* 类型角标 */}
-                    <span className="as-card-type-badge">{MATERIAL_TYPE_LABELS[asset.type]}</span>
-
-                    {/* 时长角标 */}
-                    {asset.duration != null && (
-                      <span className="as-card-duration">{formatDuration(asset.duration)}</span>
-                    )}
-
-                    {/* 质量分角标 */}
-                    {asset.quality_score != null && (
-                      <span
-                        className={`as-card-quality ${qualityLevel}`}
-                        title={`质量分: ${asset.quality_score}`}
-                      >
-                        {asset.quality_score}
-                      </span>
-                    )}
-                  </div>
-
-                  {/* 信息 */}
-                  <div className="as-card-info">
-                    <p className="as-card-name" title={asset.name}>
-                      {asset.name}
-                    </p>
-                    <div className="as-card-meta">{formatSize(asset.size)}</div>
-                  </div>
-                </div>
-              )
-            })}
+            {filteredAssets.map((asset, idx) => (
+              <AssetCard
+                key={asset.id}
+                asset={asset}
+                isSelected={selectedSet.has(asset.id)}
+                isDragging={dragIdx === idx}
+                isDragOver={dragOverIdx === idx}
+                showCheckbox={showBatchSelect}
+                compact={compact}
+                onToggleSelect={(a, shiftKey) => toggleSelect(a, idx, shiftKey)}
+                onCardClick={(a, e) => handleCardClick(a, idx, e)}
+                onDragStart={(e) => handleDragStart(e, idx)}
+                onDragOver={(e) => handleDragOver(e, idx)}
+                onDrop={(e) => handleDrop(e, idx)}
+                onDragEnd={handleDragEnd}
+                onMouseEnter={(e) => handleMouseEnter(asset, e)}
+                onMouseLeave={handleMouseLeave}
+              />
+            ))}
          </div>
        ) : (
-          /* ── 列表视图 ── */
+          /* 列表视图 */
          <div className="as-list">
-            {filteredAssets.map((asset, idx) => {
-              const isSelected = selectedSet.has(asset.id)
-              const isDragging = dragIdx === idx
-              const isDragOver = dragOverIdx === idx
-
-              return (
-                <div
-                  key={asset.id}
-                  className={[
-                    "as-list-item",
-                    isSelected ? "selected" : "",
-                    isDragging ? "dragging" : "",
-                    isDragOver ? "drag-over" : "",
-                  ]
-                    .filter(Boolean)
-                    .join(" ")}
-                  draggable
-                  onDragStart={(e) => handleDragStart(e, idx)}
-                  onDragOver={(e) => handleDragOver(e, idx)}
-                  onDrop={(e) => handleDrop(e, idx)}
-                  onDragEnd={handleDragEnd}
-                  onClick={(e) => handleCardClick(asset, idx, e)}
-                  onMouseEnter={(e) => handleMouseEnter(asset, e)}
-                  onMouseLeave={handleMouseLeave}
-                >
-                  {/* 拖拽手柄 */}
-                  <span className="as-list-item-drag" title="拖拽排序">
-                    ⠿
-                  </span>
-
-                  {/* Checkbox */}
-                  {showBatchSelect && (
-                    <span
-                      data-checkbox
-                      className={`as-list-item-checkbox${isSelected ? " checked" : ""}`}
-                      onClick={(e) => {
-                        e.stopPropagation()
-                        toggleSelect(asset, idx, e.shiftKey)
-                      }}
-                    />
-                  )}
-
-                  {/* 图标 */}
-                  <span className="as-list-item-icon">{MATERIAL_TYPE_ICONS[asset.type]}</span>
-
-                  {/* 信息 */}
-                  <div className="as-list-item-info">
-                    <div className="as-list-item-name">{asset.name}</div>
-                    <div className="as-list-item-meta">
-                      {MATERIAL_TYPE_LABELS[asset.type]}
-                      {asset.duration != null && ` · ${formatDuration(asset.duration)}`}
-                      {asset.size != null && ` · ${formatSize(asset.size)}`}
-                    </div>
-                  </div>
-
-                  {/* 质量分 */}
-                  {asset.quality_score != null && (
-                    <span
-                      className="as-list-item-quality"
-                      style={{ color: getQualityColor(asset.quality_score) }}
-                    >
-                      {asset.quality_score}分
-                    </span>
-                  )}
-                </div>
-              )
-            })}
+            {filteredAssets.map((asset, idx) => (
+              <AssetListItem
+                key={asset.id}
+                asset={asset}
+                isSelected={selectedSet.has(asset.id)}
+                isDragging={dragIdx === idx}
+                isDragOver={dragOverIdx === idx}
+                showCheckbox={showBatchSelect}
+                onToggleSelect={(a, shiftKey) => toggleSelect(a, idx, shiftKey)}
+                onCardClick={(a, e) => handleCardClick(a, idx, e)}
+                onDragStart={(e) => handleDragStart(e, idx)}
+                onDragOver={(e) => handleDragOver(e, idx)}
+                onDrop={(e) => handleDrop(e, idx)}
+                onDragEnd={handleDragEnd}
+                onMouseEnter={(e) => handleMouseEnter(asset, e)}
+                onMouseLeave={handleMouseLeave}
+              />
+            ))}
          </div>
        )}
      </div>

-      {/* ═══ 悬浮预览 ═══ */}
-      {previewAsset && (
-        <div className="as-preview-overlay" style={{ left: previewPos.x, top: previewPos.y }}>
-          <div className="as-preview-overlay-thumb">
-            {previewAsset.thumbnail_url ? (
-              <img src={previewAsset.thumbnail_url} alt={previewAsset.name} />
-            ) : (
-              <span className="as-preview-overlay-thumb-icon">
-                {MATERIAL_TYPE_ICONS[previewAsset.type]}
-              </span>
-            )}
-          </div>
-          <p className="as-preview-overlay-name">{previewAsset.name}</p>
-          <div className="as-preview-overlay-meta">
-            <span>类型: {MATERIAL_TYPE_LABELS[previewAsset.type]}</span>
-            {previewAsset.duration != null && (
-              <span>时长: {formatDuration(previewAsset.duration)}</span>
-            )}
-            {previewAsset.size != null && <span>大小: {formatSize(previewAsset.size)}</span>}
-            {previewAsset.quality_score != null && (
-              <span>质量分: {previewAsset.quality_score}</span>
-            )}
-            {previewAsset.tags.length > 0 && <span>标签: {previewAsset.tags.join(", ")}</span>}
-          </div>
-        </div>
-      )}
+      {/* 悬浮预览 */}
+      {previewAsset && <PreviewOverlay asset={previewAsset} position={previewPos} />}
    </div>
  )
 }
@@ -0,0 +1,12 @@
+import React from "react"
+
+const EmptyState: React.FC = () => {
+  return (
+    <div className="as-empty">
+      <div className="as-empty-icon">📂</div>
+      <p>暂无素材</p>
+    </div>
+  )
+}
+
+export default EmptyState
@@ -0,0 +1,33 @@
+import React from "react"
+import type { MediaAsset } from "@/api/template-editor"
+import { MATERIAL_TYPE_LABELS, MATERIAL_TYPE_ICONS } from "@/api/template-editor"
+import { formatSize, formatDuration } from "./utils"
+
+interface PreviewOverlayProps {
+  asset: MediaAsset
+  position: { x: number; y: number }
+}
+
+const PreviewOverlay: React.FC<PreviewOverlayProps> = ({ asset, position }) => {
+  return (
+    <div className="as-preview-overlay" style={{ left: position.x, top: position.y }}>
+      <div className="as-preview-overlay-thumb">
+        {asset.thumbnail_url ? (
+          <img src={asset.thumbnail_url} alt={asset.name} />
+        ) : (
+          <span className="as-preview-overlay-thumb-icon">{MATERIAL_TYPE_ICONS[asset.type]}</span>
+        )}
+      </div>
+      <p className="as-preview-overlay-name">{asset.name}</p>
+      <div className="as-preview-overlay-meta">
+        <span>类型: {MATERIAL_TYPE_LABELS[asset.type]}</span>
+        {asset.duration != null && <span>时长: {formatDuration(asset.duration)}</span>}
+        {asset.size != null && <span>大小: {formatSize(asset.size)}</span>}
+        {asset.quality_score != null && <span>质量分: {asset.quality_score}</span>}
+        {asset.tags.length > 0 && <span>标签: {asset.tags.join(", ")}</span>}
+      </div>
+    </div>
+  )
+}
+
+export default PreviewOverlay
@@ -0,0 +1,22 @@
+import React from "react"
+import { Button } from "@/components/ui"
+
+interface SelectorBatchBarProps {
+  selectedCount: number
+  onClear: () => void
+}
+
+const SelectorBatchBar: React.FC<SelectorBatchBarProps> = ({ selectedCount, onClear }) => {
+  return (
+    <div className="as-batch-bar">
+      <span className="as-batch-bar-count">已选 {selectedCount} 项</span>
+      <div className="as-batch-bar-actions">
+        <Button buttonType="ghost" buttonSize="sm" onClick={onClear}>
+          取消选择
+        </Button>
+      </div>
+    </div>
+  )
+}
+
+export default SelectorBatchBar
@@ -0,0 +1,74 @@
+import React from "react"
+import { Input, Select } from "@/components/ui"
+import { TYPE_OPTIONS } from "./constants"
+import { QUALITY_OPTIONS } from "@/api/template-editor"
+import type { ViewMode } from "./types"
+
+interface SelectorToolbarProps {
+  searchText: string
+  filterType: string
+  filterQuality: string
+  viewMode: ViewMode
+  showQualityFilter: boolean
+  onSearchChange: (value: string) => void
+  onTypeChange: (value: string) => void
+  onQualityChange: (value: string) => void
+  onViewModeChange: (mode: ViewMode) => void
+}
+
+const SelectorToolbar: React.FC<SelectorToolbarProps> = ({
+  searchText,
+  filterType,
+  filterQuality,
+  viewMode,
+  showQualityFilter,
+  onSearchChange,
+  onTypeChange,
+  onQualityChange,
+  onViewModeChange,
+}) => {
+  return (
+    <div className="as-toolbar">
+      <div className="as-toolbar-left">
+        <div className="as-search">
+          <Input
+            placeholder="搜索素材..."
+            value={searchText}
+            onChange={(e) => onSearchChange(e.target.value)}
+            prefix="🔍"
+          />
+        </div>
+        <Select
+          value={filterType}
+          onChange={(v: string) => onTypeChange(v)}
+          options={TYPE_OPTIONS}
+        />
+        {showQualityFilter && (
+          <Select
+            value={filterQuality}
+            onChange={(v: string) => onQualityChange(v)}
+            options={QUALITY_OPTIONS}
+          />
+        )}
+      </div>
+      <div className="as-toolbar-right">
+        <button
+          className={`as-view-btn${viewMode === "grid" ? " active" : ""}`}
+          onClick={() => onViewModeChange("grid")}
+          title="网格视图"
+        >
+          ⊞
+        </button>
+        <button
+          className={`as-view-btn${viewMode === "list" ? " active" : ""}`}
+          onClick={() => onViewModeChange("list")}
+          title="列表视图"
+        >
+          ☰
+        </button>
+      </div>
+    </div>
+  )
+}
+
+export default SelectorToolbar
@@ -0,0 +1,7 @@
+/** 类型筛选选项 */
+export const TYPE_OPTIONS = [
+  { value: "", label: "全部类型" },
+  { value: "video", label: "🎬 视频" },
+  { value: "image", label: "🖼️ 图片" },
+  { value: "audio", label: "🎵 音频" },
+]
@@ -0,0 +1,63 @@
+import { useState, useMemo } from "react"
+import type { MediaAsset } from "@/api/template-editor"
+import { QUALITY_OPTIONS } from "@/api/template-editor"
+import type { ViewMode } from "../types"
+
+interface UseAssetFilterReturn {
+  searchText: string
+  filterType: string
+  filterQuality: string
+  viewMode: ViewMode
+  filteredAssets: MediaAsset[]
+  setSearchText: (value: string) => void
+  setFilterType: (value: string) => void
+  setFilterQuality: (value: string) => void
+  setViewMode: (mode: ViewMode) => void
+}
+
+/**
+ * 素材筛选 Hook —— 搜索 + 类型 + 质量分 + 视图切换
+ */
+const useAssetFilter = (assets: MediaAsset[]): UseAssetFilterReturn => {
+  const [searchText, setSearchText] = useState("")
+  const [filterType, setFilterType] = useState("")
+  const [filterQuality, setFilterQuality] = useState("")
+  const [viewMode, setViewMode] = useState<ViewMode>("grid")
+
+  const filteredAssets = useMemo(() => {
+    let list = assets
+    if (searchText) {
+      const q = searchText.toLowerCase()
+      list = list.filter(
+        (a) => a.name.toLowerCase().includes(q) || a.tags.some((t) => t.toLowerCase().includes(q)),
+      )
+    }
+    if (filterType) {
+      list = list.filter((a) => a.type === filterType)
+    }
+    if (filterQuality) {
+      const opt = QUALITY_OPTIONS.find((o) => o.value === filterQuality)
+      if (opt?.min != null && opt?.max != null) {
+        list = list.filter(
+          (a) =>
+            a.quality_score != null && a.quality_score >= opt.min! && a.quality_score <= opt.max!,
+        )
+      }
+    }
+    return list
+  }, [assets, searchText, filterType, filterQuality])
+
+  return {
+    searchText,
+    filterType,
+    filterQuality,
+    viewMode,
+    filteredAssets,
+    setSearchText,
+    setFilterType,
+    setFilterQuality,
+    setViewMode,
+  }
+}
+
+export default useAssetFilter
@@ -0,0 +1,54 @@
+import { useState, useRef, useCallback, useEffect } from "react"
+import type { MediaAsset } from "@/api/template-editor"
+
+interface UseAssetPreviewReturn {
+  previewAsset: MediaAsset | null
+  previewPos: { x: number; y: number }
+  handleMouseEnter: (asset: MediaAsset, e: React.MouseEvent) => void
+  handleMouseLeave: () => void
+}
+
+/**
+ * 悬浮预览 Hook —— 延迟 400ms 显示预览浮层
+ */
+const useAssetPreview = (): UseAssetPreviewReturn => {
+  const [previewAsset, setPreviewAsset] = useState<MediaAsset | null>(null)
+  const [previewPos, setPreviewPos] = useState({ x: 0, y: 0 })
+  const previewTimer = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+  const handleMouseEnter = useCallback((asset: MediaAsset, e: React.MouseEvent) => {
+    if (previewTimer.current) clearTimeout(previewTimer.current)
+    previewTimer.current = setTimeout(() => {
+      const rect = (e.currentTarget as HTMLElement).getBoundingClientRect()
+      setPreviewAsset(asset)
+      setPreviewPos({
+        x: rect.right + 12,
+        y: Math.max(8, rect.top - 20),
+      })
+    }, 400)
+  }, [])
+
+  const handleMouseLeave = useCallback(() => {
+    if (previewTimer.current) {
+      clearTimeout(previewTimer.current)
+      previewTimer.current = null
+    }
+    setPreviewAsset(null)
+  }, [])
+
+  // 清理定时器
+  useEffect(() => {
+    return () => {
+      if (previewTimer.current) clearTimeout(previewTimer.current)
+    }
+  }, [])
+
+  return {
+    previewAsset,
+    previewPos,
+    handleMouseEnter,
+    handleMouseLeave,
+  }
+}
+
+export default useAssetPreview
@@ -0,0 +1,65 @@
+import { useCallback, useRef, useMemo } from "react"
+import type { MediaAsset } from "@/api/template-editor"
+
+interface UseAssetSelectionOptions {
+  filteredAssets: MediaAsset[]
+  selectedIds: string[]
+  onSelectionChange?: (ids: string[]) => void
+}
+
+interface UseAssetSelectionReturn {
+  selectedSet: Set<string>
+  toggleSelect: (asset: MediaAsset, idx: number, shiftKey: boolean) => void
+  clearSelection: () => void
+}
+
+/**
+ * 素材选择 Hook —— 单选/多选/Shift 连选
+ */
+const useAssetSelection = ({
+  filteredAssets,
+  selectedIds,
+  onSelectionChange,
+}: UseAssetSelectionOptions): UseAssetSelectionReturn => {
+  const lastClickedIdx = useRef<number | null>(null)
+
+  const selectedSet = useMemo(() => new Set(selectedIds), [selectedIds])
+
+  const toggleSelect = useCallback(
+    (asset: MediaAsset, idx: number, shiftKey: boolean) => {
+      if (!onSelectionChange) return
+
+      if (shiftKey && lastClickedIdx.current !== null) {
+        // Shift 连选
+        const start = Math.min(lastClickedIdx.current, idx)
+        const end = Math.max(lastClickedIdx.current, idx)
+        const rangeIds = filteredAssets.slice(start, end + 1).map((a) => a.id)
+        const newSet = new Set(selectedIds)
+        rangeIds.forEach((id) => newSet.add(id))
+        onSelectionChange(Array.from(newSet))
+      } else {
+        const newSet = new Set(selectedIds)
+        if (newSet.has(asset.id)) {
+          newSet.delete(asset.id)
+        } else {
+          newSet.add(asset.id)
+        }
+        onSelectionChange(Array.from(newSet))
+      }
+      lastClickedIdx.current = idx
+    },
+    [onSelectionChange, selectedIds, filteredAssets],
+  )
+
+  const clearSelection = useCallback(() => {
+    onSelectionChange?.([])
+  }, [onSelectionChange])
+
+  return {
+    selectedSet,
+    toggleSelect,
+    clearSelection,
+  }
+}
+
+export default useAssetSelection
@@ -0,0 +1,89 @@
+import { useState, useCallback } from "react"
+import type { MediaAsset } from "@/api/template-editor"
+
+interface UseDragReorderOptions {
+  filteredAssets: MediaAsset[]
+  selectedIds: string[]
+  onAssetDragStart?: (asset: MediaAsset) => void
+  onReorder?: (fromIdx: number, toIdx: number) => void
+}
+
+interface UseDragReorderReturn {
+  dragIdx: number | null
+  dragOverIdx: number | null
+  handleDragStart: (e: React.DragEvent, idx: number) => void
+  handleDragOver: (e: React.DragEvent, idx: number) => void
+  handleDrop: (e: React.DragEvent, toIdx: number) => void
+  handleDragEnd: () => void
+}
+
+/**
+ * 拖拽排序 Hook —— HTML5 DnD，支持批量拖拽携带数据
+ */
+const useDragReorder = ({
+  filteredAssets,
+  selectedIds,
+  onAssetDragStart,
+  onReorder,
+}: UseDragReorderOptions): UseDragReorderReturn => {
+  const [dragIdx, setDragIdx] = useState<number | null>(null)
+  const [dragOverIdx, setDragOverIdx] = useState<number | null>(null)
+
+  const handleDragStart = useCallback(
+    (e: React.DragEvent, idx: number) => {
+      setDragIdx(idx)
+      e.dataTransfer.effectAllowed = "move"
+      e.dataTransfer.setData("text/plain", String(idx))
+      // 设置素材数据，供 TimelinePanel 接收
+      e.dataTransfer.setData("application/x-media-asset", JSON.stringify(filteredAssets[idx]))
+      // 批量拖拽：如果有多个选中素材，一起携带
+      if (selectedIds.length > 1 && selectedIds.includes(filteredAssets[idx].id)) {
+        const batchAssets = filteredAssets.filter((a) => selectedIds.includes(a.id))
+        e.dataTransfer.setData("application/x-media-assets", JSON.stringify(batchAssets))
+      }
+      // 通知父组件素材拖拽开始
+      if (onAssetDragStart) {
+        onAssetDragStart(filteredAssets[idx])
+      }
+    },
+    [filteredAssets, selectedIds, onAssetDragStart],
+  )
+
+  const handleDragOver = useCallback(
+    (e: React.DragEvent, idx: number) => {
+      e.preventDefault()
+      e.dataTransfer.dropEffect = "move"
+      if (dragIdx === null || dragIdx === idx) return
+      setDragOverIdx(idx)
+    },
+    [dragIdx],
+  )
+
+  const handleDrop = useCallback(
+    (e: React.DragEvent, toIdx: number) => {
+      e.preventDefault()
+      if (dragIdx !== null && dragIdx !== toIdx && onReorder) {
+        onReorder(dragIdx, toIdx)
+      }
+      setDragIdx(null)
+      setDragOverIdx(null)
+    },
+    [dragIdx, onReorder],
+  )
+
+  const handleDragEnd = useCallback(() => {
+    setDragIdx(null)
+    setDragOverIdx(null)
+  }, [])
+
+  return {
+    dragIdx,
+    dragOverIdx,
+    handleDragStart,
+    handleDragOver,
+    handleDrop,
+    handleDragEnd,
+  }
+}
+
+export default useDragReorder
@@ -1,2 +1,2 @@
 export { default as AssetSelector } from "./AssetSelector"
-export type { AssetSelectorProps } from "./AssetSelector"
+export type { AssetSelectorProps, ViewMode } from "./types"
@@ -0,0 +1,14 @@
+import type { MediaAsset } from "@/api/template-editor"
+
+export interface AssetSelectorProps {
+  assets: MediaAsset[]
+  selectedIds?: string[]
+  onSelectionChange?: (ids: string[]) => void
+  onAssetDragStart?: (asset: MediaAsset) => void
+  onReorder?: (fromIdx: number, toIdx: number) => void
+  showQualityFilter?: boolean
+  showBatchSelect?: boolean
+  compact?: boolean
+}
+
+export type ViewMode = "grid" | "list"
@@ -0,0 +1,33 @@
+/** 格式化文件大小 */
+export const formatSize = (bytes?: number): string => {
+  if (!bytes) return ""
+  if (bytes < 1024) return `${bytes}B`
+  if (bytes < 1024 * 1024) return `${(bytes / 1024).toFixed(1)}KB`
+  return `${(bytes / (1024 * 1024)).toFixed(1)}MB`
+}
+
+/** 格式化时长 */
+export const formatDuration = (seconds?: number): string => {
+  if (!seconds) return ""
+  const m = Math.floor(seconds / 60)
+  const s = Math.floor(seconds % 60)
+  return m > 0 ? `${m}:${s.toString().padStart(2, "0")}` : `${s}s`
+}
+
+/** 获取质量分等级 */
+export const getQualityLevel = (score?: number): string => {
+  if (score == null) return "none"
+  if (score >= 90) return "excellent"
+  if (score >= 70) return "good"
+  if (score >= 50) return "fair"
+  return "poor"
+}
+
+/** 质量分颜色 */
+export const getQualityColor = (score?: number): string => {
+  if (score == null) return "var(--text-secondary)"
+  if (score >= 90) return "var(--success-color, #10b981)"
+  if (score >= 70) return "var(--primary-color, #6366f1)"
+  if (score >= 50) return "var(--warning-color, #f59e0b)"
+  return "var(--error-color, #ef4444)"
+}
@@ -0,0 +1,134 @@
+import { useState, useRef, useCallback, useEffect } from "react"
+import type { ModalPhase } from "../types/cloneModal"
+import { MIN_VOICE_NAME_LENGTH, MAX_VOICE_NAME_LENGTH } from "../constants/cloneModal"
+import useAudioRecorder from "./useAudioRecorder"
+
+/**
+ * 克隆弹窗表单状态 Hook
+ * 管理表单字段、录音、文件选择、验证逻辑
+ */
+export function useCloneFormState({ open, onClose }: { open: boolean; onClose: () => void }) {
+  const [phase, setPhase] = useState<ModalPhase>("input")
+  const [voiceName, setVoiceName] = useState("")
+  const [voiceDescription, setVoiceDescription] = useState("")
+  const [selectedFile, setSelectedFile] = useState<File | null>(null)
+  const [dragActive, setDragActive] = useState(false)
+  const [errorMessage, setErrorMessage] = useState("")
+
+  const { isRecording, recordTime, recordedBlob, toggleRecording, resetRecording } =
+    useAudioRecorder()
+
+  /** 默认音色名称计数器 */
+  const cloneCounterRef = useRef(1)
+
+  const getNextDefaultName = useCallback((): string => {
+    const name = `我的声音 ${cloneCounterRef.current}`
+    cloneCounterRef.current += 1
+    return name
+  }, [])
+
+  const hasAudio = selectedFile !== null || recordedBlob !== null
+
+  const canSubmit =
+    voiceName.trim().length >= MIN_VOICE_NAME_LENGTH &&
+    voiceName.trim().length <= MAX_VOICE_NAME_LENGTH &&
+    hasAudio
+
+  const isProcessing = phase === "uploading" || phase === "cloning"
+
+  /** 重置弹窗状态 */
+  const resetState = useCallback(() => {
+    setPhase("input")
+    setVoiceName(getNextDefaultName())
+    setVoiceDescription("")
+    setSelectedFile(null)
+    setDragActive(false)
+    setErrorMessage("")
+    resetRecording()
+  }, [getNextDefaultName, resetRecording])
+
+  /** 关闭弹窗 */
+  const handleClose = useCallback(() => {
+    resetState()
+    onClose()
+  }, [resetState, onClose])
+
+  /** 弹窗打开时重置状态 */
+  useEffect(() => {
+    if (open) {
+      resetState()
+    }
+  }, [open, resetState])
+
+  /** 选择文件（来自上传或拖拽） */
+  const handleFileSelect = useCallback(
+    (file: File | null, error: string) => {
+      if (error) {
+        setErrorMessage(error)
+        setSelectedFile(null)
+      } else {
+        setErrorMessage("")
+        setSelectedFile(file)
+        // 清除录音
+        resetRecording()
+      }
+    },
+    [resetRecording],
+  )
+
+  /** 录音切换 */
+  const handleRecordToggle = useCallback(() => {
+    setErrorMessage("")
+    if (isRecording) {
+      toggleRecording()
+    } else {
+      // 开始录制前清除已选文件
+      setSelectedFile(null)
+      toggleRecording()
+    }
+  }, [isRecording, toggleRecording])
+
+  /** 表单验证 */
+  const validateForm = useCallback((): string | null => {
+    const name = voiceName.trim()
+    if (!name) {
+      return "请输入音色名称"
+    }
+    if (name.length < MIN_VOICE_NAME_LENGTH || name.length > MAX_VOICE_NAME_LENGTH) {
+      return `音色名称需在 ${MIN_VOICE_NAME_LENGTH}-${MAX_VOICE_NAME_LENGTH} 个字符之间`
+    }
+    if (!hasAudio) {
+      return "请上传音频文件或录制一段声音"
+    }
+    return null
+  }, [voiceName, hasAudio])
+
+  return {
+    // 状态
+    phase,
+    setPhase,
+    voiceName,
+    setVoiceName,
+    voiceDescription,
+    setVoiceDescription,
+    selectedFile,
+    dragActive,
+    setDragActive,
+    errorMessage,
+    setErrorMessage,
+    // 录音
+    isRecording,
+    recordTime,
+    recordedBlob,
+    // 计算属性
+    hasAudio,
+    canSubmit,
+    isProcessing,
+    // handlers
+    handleFileSelect,
+    handleRecordToggle,
+    handleClose,
+    validateForm,
+    resetState,
+  }
+}
@@ -1,213 +1,44 @@
-import { useState, useRef, useCallback, useEffect } from "react"
-import { createVoiceClone, toVoiceClone } from "@/api/voice-clone"
-import { uploadAsset } from "@/api/assets"
-import type { ModalPhase, CloneModalProps } from "../types/cloneModal"
-import { MIN_VOICE_NAME_LENGTH, MAX_VOICE_NAME_LENGTH } from "../constants/cloneModal"
-import useAudioRecorder from "./useAudioRecorder"
-
-interface UseCloneModalReturn {
-  phase: ModalPhase
-  voiceName: string
-  voiceDescription: string
-  selectedFile: File | null
-  dragActive: boolean
-  errorMessage: string
-  isRecording: boolean
-  recordTime: number
-  recordedBlob: Blob | null
-  canSubmit: boolean
-  isProcessing: boolean
-  setVoiceName: (value: string) => void
-  setVoiceDescription: (value: string) => void
-  setDragActive: (active: boolean) => void
-  handleFileSelect: (file: File | null, error: string) => void
-  handleRecordToggle: () => void
-  handleClose: () => void
-  handleSubmit: () => void
-}
+import type { CloneModalProps } from "../types/cloneModal"
+import { useCloneFormState } from "./useCloneFormState"
+import { useCloneSubmit } from "./useCloneSubmit"

 /**
 * 音色克隆弹窗主业务 Hook
+ * 组合表单状态 + 提交流程两个子 Hook
 */
-const useCloneModal = ({ open, onClose, onSuccess }: CloneModalProps): UseCloneModalReturn => {
-  const [phase, setPhase] = useState<ModalPhase>("input")
-  const [voiceName, setVoiceName] = useState("")
-  const [voiceDescription, setVoiceDescription] = useState("")
-  const [selectedFile, setSelectedFile] = useState<File | null>(null)
-  const [dragActive, setDragActive] = useState(false)
-  const [errorMessage, setErrorMessage] = useState("")
+const useCloneModal = ({ open, onClose, onSuccess }: CloneModalProps) => {
+  const formState = useCloneFormState({ open, onClose })

-  const { isRecording, recordTime, recordedBlob, toggleRecording, resetRecording } =
-    useAudioRecorder()
-
-  const timerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
-  /** 默认音色名称计数器 */
-  const cloneCounterRef = useRef(1)
-
-  const getNextDefaultName = useCallback((): string => {
-    const name = `我的声音 ${cloneCounterRef.current}`
-    cloneCounterRef.current += 1
-    return name
-  }, [])
-
-  const hasAudio = selectedFile !== null || recordedBlob !== null
-
-  const canSubmit =
-    voiceName.trim().length >= MIN_VOICE_NAME_LENGTH &&
-    voiceName.trim().length <= MAX_VOICE_NAME_LENGTH &&
-    hasAudio
-
-  const isProcessing = phase === "uploading" || phase === "cloning"
-
-  /** 重置弹窗状态 */
-  const resetState = useCallback(() => {
-    setPhase("input")
-    setVoiceName(getNextDefaultName())
-    setVoiceDescription("")
-    setSelectedFile(null)
-    setDragActive(false)
-    setErrorMessage("")
-    resetRecording()
-  }, [getNextDefaultName, resetRecording])
-
-  /** 关闭弹窗 */
-  const handleClose = useCallback(() => {
-    resetState()
-    onClose()
-  }, [resetState, onClose])
-
-  /** 弹窗打开时重置状态 */
-  useEffect(() => {
-    if (open) {
-      resetState()
-    }
-  }, [open, resetState])
-
-  /** 组件卸载时清理定时器 */
-  useEffect(() => {
-    return () => {
-      if (timerRef.current) clearTimeout(timerRef.current)
-    }
-  }, [])
-
-  /** 选择文件（来自上传或拖拽） */
-  const handleFileSelect = useCallback(
-    (file: File | null, error: string) => {
-      if (error) {
-        setErrorMessage(error)
-        setSelectedFile(null)
-      } else {
-        setErrorMessage("")
-        setSelectedFile(file)
-        // 清除录音
-        resetRecording()
-      }
-    },
-    [resetRecording],
-  )
-
-  /** 录音切换 */
-  const handleRecordToggle = useCallback(() => {
-    setErrorMessage("")
-    if (isRecording) {
-      toggleRecording()
-    } else {
-      // 开始录制前清除已选文件
-      setSelectedFile(null)
-      toggleRecording()
-    }
-  }, [isRecording, toggleRecording])
-
-  /** 表单验证 */
-  const validateForm = useCallback((): string | null => {
-    const name = voiceName.trim()
-    if (!name) {
-      return "请输入音色名称"
-    }
-    if (name.length < MIN_VOICE_NAME_LENGTH || name.length > MAX_VOICE_NAME_LENGTH) {
-      return `音色名称需在 ${MIN_VOICE_NAME_LENGTH}-${MAX_VOICE_NAME_LENGTH} 个字符之间`
-    }
-    if (!hasAudio) {
-      return "请上传音频文件或录制一段声音"
-    }
-    return null
-  }, [voiceName, hasAudio])
-
-  /** 提交克隆 */
-  const handleSubmit = useCallback(async () => {
-    const formError = validateForm()
-    if (formError) {
-      setErrorMessage(formError)
-      return
-    }
-
-    setErrorMessage("")
-
-    try {
-      // 阶段 1：上传音频
-      setPhase("uploading")
-
-      let fileToUpload: File
-      if (selectedFile) {
-        fileToUpload = selectedFile
-      } else {
-        fileToUpload = new File([recordedBlob!], `recorded-${Date.now()}.webm`, {
-          type: "audio/webm",
-        })
-      }
-
-      const formData = new FormData()
-      formData.append("file", fileToUpload)
-      const uploadResult = await uploadAsset(formData)
-
-      // 阶段 2：克隆
-      setPhase("cloning")
-      const result = await createVoiceClone({
-        name: voiceName.trim(),
-        description: voiceDescription.trim() || undefined,
-        audio_url: uploadResult.url,
-      })
-
-      // 阶段 3：完成
-      setPhase("done")
-
-      // 2秒后自动关闭
-      timerRef.current = setTimeout(() => {
-        onSuccess?.(toVoiceClone(result))
-        handleClose()
-      }, 2000)
-    } catch (err) {
-      setPhase("input")
-      setErrorMessage(err instanceof Error ? err.message : "克隆失败，请重试")
-    }
-  }, [
-    validateForm,
-    selectedFile,
-    recordedBlob,
-    voiceName,
-    voiceDescription,
+  const { handleSubmit } = useCloneSubmit({
+    voiceName: formState.voiceName,
+    voiceDescription: formState.voiceDescription,
+    selectedFile: formState.selectedFile,
+    recordedBlob: formState.recordedBlob,
+    setPhase: formState.setPhase,
+    setErrorMessage: formState.setErrorMessage,
+    validateForm: formState.validateForm,
    onSuccess,
-    handleClose,
-  ])
+    onClose: formState.handleClose,
+  })

  return {
-    phase,
-    voiceName,
-    voiceDescription,
-    selectedFile,
-    dragActive,
-    errorMessage,
-    isRecording,
-    recordTime,
-    recordedBlob,
-    canSubmit,
-    isProcessing,
-    setVoiceName,
-    setVoiceDescription,
-    setDragActive,
-    handleFileSelect,
-    handleRecordToggle,
-    handleClose,
+    phase: formState.phase,
+    voiceName: formState.voiceName,
+    voiceDescription: formState.voiceDescription,
+    selectedFile: formState.selectedFile,
+    dragActive: formState.dragActive,
+    errorMessage: formState.errorMessage,
+    isRecording: formState.isRecording,
+    recordTime: formState.recordTime,
+    recordedBlob: formState.recordedBlob,
+    canSubmit: formState.canSubmit,
+    isProcessing: formState.isProcessing,
+    setVoiceName: formState.setVoiceName,
+    setVoiceDescription: formState.setVoiceDescription,
+    setDragActive: formState.setDragActive,
+    handleFileSelect: formState.handleFileSelect,
+    handleRecordToggle: formState.handleRecordToggle,
+    handleClose: formState.handleClose,
    handleSubmit,
  }
 }
@@ -0,0 +1,101 @@
+import { useRef, useCallback, useEffect } from "react"
+import { createVoiceClone, toVoiceClone } from "@/api/voice-clone"
+import { uploadAsset } from "@/api/assets"
+import type { VoiceClone } from "@/api/voice-clone"
+
+interface UseCloneSubmitOptions {
+  voiceName: string
+  voiceDescription: string
+  selectedFile: File | null
+  recordedBlob: Blob | null
+  setPhase: (phase: "input" | "uploading" | "cloning" | "done") => void
+  setErrorMessage: (msg: string) => void
+  validateForm: () => string | null
+  onSuccess?: (clone: VoiceClone) => void
+  onClose: () => void
+}
+
+/**
+ * 克隆提交流程 Hook
+ * 封装上传 + 克隆 + 完成的三阶段流程
+ */
+export function useCloneSubmit({
+  voiceName,
+  voiceDescription,
+  selectedFile,
+  recordedBlob,
+  setPhase,
+  setErrorMessage,
+  validateForm,
+  onSuccess,
+  onClose,
+}: UseCloneSubmitOptions) {
+  const timerRef = useRef<ReturnType<typeof setTimeout> | null>(null)
+
+  /** 组件卸载时清理定时器 */
+  useEffect(() => {
+    return () => {
+      if (timerRef.current) clearTimeout(timerRef.current)
+    }
+  }, [])
+
+  const handleSubmit = useCallback(async () => {
+    const formError = validateForm()
+    if (formError) {
+      setErrorMessage(formError)
+      return
+    }
+
+    setErrorMessage("")
+
+    try {
+      // 阶段 1：上传音频
+      setPhase("uploading")
+
+      let fileToUpload: File
+      if (selectedFile) {
+        fileToUpload = selectedFile
+      } else {
+        fileToUpload = new File([recordedBlob!], `recorded-${Date.now()}.webm`, {
+          type: "audio/webm",
+        })
+      }
+
+      const formData = new FormData()
+      formData.append("file", fileToUpload)
+      const uploadResult = await uploadAsset(formData)
+
+      // 阶段 2：克隆
+      setPhase("cloning")
+      const result = await createVoiceClone({
+        name: voiceName.trim(),
+        description: voiceDescription.trim() || undefined,
+        audio_url: uploadResult.url,
+      })
+
+      // 阶段 3：完成
+      setPhase("done")
+
+      // 2秒后自动关闭
+      timerRef.current = setTimeout(() => {
+        onSuccess?.(toVoiceClone(result))
+        onClose()
+      }, 2000)
+    } catch (err) {
+      setPhase("input")
+      setErrorMessage(err instanceof Error ? err.message : "克隆失败，请重试")
+    }
+  }, [
+    validateForm,
+    selectedFile,
+    recordedBlob,
+    voiceName,
+    voiceDescription,
+    setPhase,
+    setErrorMessage,
+    onSuccess,
+    onClose,
+  ])
+
+  return { handleSubmit }
+}
@@ -1,116 +1,35 @@
 /**
 * 查重上传页面 — V21 设计系统
 * 左右分栏：拖拽上传区 + 格式说明
- * 零 antd 依赖
 */
-import React, { useState, useRef, useCallback } from "react"
-import { useMutation } from "@tanstack/react-query"
-import { Button, Card, Tag } from "@/components/ui"
-import { uploadForDuplication } from "@/api/duplication"
+import React from "react"
 import { useNavigate } from "react-router-dom"
-import "./duplication.css"
+import { Card } from "@/components/ui"
 import PageHead from "@/components/layout/PageHead"
-
-/** 支持的视频格式 */
-const ACCEPT_FORMATS = ".mp4,.avi,.mov,.mkv,.wmv,.flv,.webm"
-const FORMAT_LIST = ["MP4", "AVI", "MOV", "MKV", "WMV", "FLV", "WebM"]
-/** 最大文件大小：2GB */
-const MAX_FILE_SIZE = 2 * 1024 * 1024 * 1024
-
-/** 简易 toast */
-interface ToastState {
-  message: string
-  type: "success" | "error" | "warning"
-}
+import UploadZone from "./duplication-upload/UploadZone"
+import UploadActions from "./duplication-upload/UploadActions"
+import UploadProgress from "./duplication-upload/UploadProgress"
+import UploadResultPanel from "./duplication-upload/UploadResultPanel"
+import InfoSidebar from "./duplication-upload/InfoSidebar"
+import { useDuplicationUpload } from "./duplication-upload/useDuplicationUpload"
+import { ACCEPT_FORMATS } from "./duplication-upload/constants"
+import "./duplication.css"

 const DuplicationUpload: React.FC = () => {
  const navigate = useNavigate()
-  const fileInputRef = useRef<HTMLInputElement>(null)
-  const [dragging, setDragging] = useState(false)
-  const [uploading, setUploading] = useState(false)
-  const [uploadResult, setUploadResult] = useState<{
-    id: string
-    message: string
-  } | null>(null)
-  const [toast, setToast] = useState<ToastState | null>(null)
-
-  /** 显示 toast */
-  const showToast = useCallback((message: string, type: "success" | "error" | "warning") => {
-    setToast({ message, type })
-    setTimeout(() => setToast(null), 3000)
-  }, [])
-
-  // 上传查重 mutation
-  const uploadMutation = useMutation({
-    mutationFn: (file: File) => uploadForDuplication(file),
-    onSuccess: (data) => {
-      setUploading(false)
-      setUploadResult({ id: data.id, message: data.message })
-      showToast("查重任务已提交", "success")
-    },
-    onError: () => {
-      setUploading(false)
-      showToast("上传失败，请重试", "error")
-    },
-  })
-
-  /** 校验并上传文件 */
-  const handleFile = useCallback(
-    (file: File) => {
-      if (file.size > MAX_FILE_SIZE) {
-        showToast("文件大小不能超过 2GB", "error")
-        return
-      }
-      const ext = file.name.toLowerCase().split(".").pop()
-      const allowedExts = ACCEPT_FORMATS.replace(/\./g, "").split(",")
-      if (!allowedExts.includes(ext || "")) {
-        showToast(`不支持的文件格式，支持：${FORMAT_LIST.join("、")}`, "error")
-        return
-      }
-      setUploading(true)
-      setUploadResult(null)
-      uploadMutation.mutate(file)
-    },
-    [uploadMutation, showToast],
-  )
-
-  /** 拖拽事件 */
-  const handleDragOver = useCallback((e: React.DragEvent) => {
-    e.preventDefault()
-    setDragging(true)
-  }, [])
-
-  const handleDragLeave = useCallback(() => {
-    setDragging(false)
-  }, [])
-
-  const handleDrop = useCallback(
-    (e: React.DragEvent) => {
-      e.preventDefault()
-      setDragging(false)
-      const file = e.dataTransfer.files[0]
-      if (file) handleFile(file)
-    },
-    [handleFile],
-  )
-
-  /** 点击选择文件 */
-  const handleSelectFile = () => {
-    fileInputRef.current?.click()
-  }
-
-  const handleFileChange = (e: React.ChangeEvent<HTMLInputElement>) => {
-    const file = e.target.files?.[0]
-    if (file) handleFile(file)
-    // 重置 input 以便重复选择同一文件
-    e.target.value = ""
-  }
-
-  /** 重置状态 */
-  const handleReset = () => {
-    setUploadResult(null)
-    setUploading(false)
-  }
+  const {
+    fileInputRef,
+    dragging,
+    uploading,
+    uploadResult,
+    toast,
+    handleDragOver,
+    handleDragLeave,
+    handleDrop,
+    handleSelectFile,
+    handleFileChange,
+    handleReset,
+  } = useDuplicationUpload()

  return (
    <div className="dup-page">
@@ -125,25 +44,14 @@ const DuplicationUpload: React.FC = () => {
      <div className="dup-upload-grid">
        {/* 左侧：上传区域 */}
        <Card>
-          {/* 拖拽上传区 */}
-          <div
-            className={`dup-upload-zone ${dragging ? "dragging" : ""} ${uploading ? "disabled" : ""}`}
+          <UploadZone
+            dragging={dragging}
+            uploading={uploading}
            onDragOver={handleDragOver}
            onDragLeave={handleDragLeave}
            onDrop={handleDrop}
-            onClick={uploading ? undefined : handleSelectFile}
-          >
-            <div className="dup-upload-icon">{uploading ? "⏳" : "📁"}</div>
-            <h3>{uploading ? "正在上传并查重..." : "点击或拖拽视频文件到此区域"}</h3>
-            <p>支持 MP4、AVI、MOV、MKV 等格式，单个文件不超过 2GB</p>
-            <div className="dup-upload-formats">
-              {FORMAT_LIST.map((fmt) => (
-                <Tag key={fmt} variant="info">
-                  {fmt}
-                </Tag>
-              ))}
-            </div>
-          </div>
+            onClick={handleSelectFile}
+          />

          {/* 隐藏的文件 input */}
          <input
@@ -154,77 +62,21 @@ const DuplicationUpload: React.FC = () => {
            onChange={handleFileChange}
          />

-          {/* 上传按钮 */}
-          <div className="dup-upload-actions">
-            <Button
-              buttonType="primary"
-              buttonSize="md"
-              onClick={handleSelectFile}
-              disabled={uploading}
-            >
-              📂 选择文件
-            </Button>
-          </div>
+          <UploadActions uploading={uploading} onSelectFile={handleSelectFile} />

-          {/* 上传进度 */}
-          {uploading && (
-            <div className="dup-progress">
-              <div className="dup-progress-circle">
-                <span className="dup-progress-icon">⏳</span>
-                <span className="dup-progress-text">查重中...</span>
-              </div>
-              <p>正在分析视频内容，请稍候...</p>
-            </div>
-          )}
+          {uploading && <UploadProgress />}

-          {/* 上传结果 */}
          {uploadResult && !uploading && (
-            <div className="dup-result">
-              <div className="dup-result-icon">✅</div>
-              <h3>查重任务已提交</h3>
-              <p>{uploadResult.message}</p>
-              <div className="dup-result-actions">
-                <Button
-                  buttonType="primary"
-                  buttonSize="md"
-                  onClick={() => navigate("/app/duplication/results")}
-                >
-                  查看结果
-                </Button>
-                <Button buttonType="secondary" buttonSize="md" onClick={handleReset}>
-                  继续上传
-                </Button>
-              </div>
-            </div>
+            <UploadResultPanel
+              result={uploadResult}
+              onViewResult={() => navigate("/app/duplication/results")}
+              onReset={handleReset}
+            />
          )}
        </Card>

        {/* 右侧：格式说明 + 提示 */}
-        <div className="dup-info-card">
-          <h3>📋 查重说明</h3>
-          <ul className="dup-info-list">
-            <li>系统会对比您上传的视频与视频库中的已有视频</li>
-            <li>查重完成后，可查看重复片段的具体位置</li>
-            <li>查重过程通常需要几分钟，取决于视频大小</li>
-            <li>高相似度片段建议进行替换或裁剪</li>
-          </ul>
-
-          <h3 style={{ marginTop: 24 }}>🎬 支持格式</h3>
-          <div className="dup-format-tags">
-            {FORMAT_LIST.map((fmt) => (
-              <Tag key={fmt} variant="info">
-                {fmt}
-              </Tag>
-            ))}
-          </div>
-
-          <h3 style={{ marginTop: 24 }}>💡 温馨提示</h3>
-          <ul className="dup-info-list">
-            <li>单个文件不超过 2GB</li>
-            <li>视频时长建议不超过 60 分钟</li>
-            <li>查重结果可在「查重记录」中随时查看</li>
-          </ul>
-        </div>
+        <InfoSidebar />
      </div>
    </div>
  )
@@ -51,7 +51,13 @@ export const FILTER_OPTIONS: { key: RiskFilter; label: string }[] = [
  { key: "high", label: "高风险" },
 ]

-/** Toast 类型 */
+/** 支持的视频格式 */
+export const ACCEPT_FORMATS = ".mp4,.avi,.mov,.mkv,.wmv,.flv,.webm"
+export const FORMAT_LIST = ["MP4", "AVI", "MOV", "MKV", "WMV", "FLV", "WebM"]
+/** 最大文件大小：2GB */
+export const MAX_FILE_SIZE = 2 * 1024 * 1024 * 1024
+
+/** 简易 toast */
 export interface ToastState {
  message: string
  type: "success" | "error" | "warning"
@@ -0,0 +1,36 @@
+import React from "react"
+import { Tag } from "@/components/ui"
+import { FORMAT_LIST } from "./constants"
+
+/** 右侧说明卡 */
+const InfoSidebar: React.FC = () => {
+  return (
+    <div className="dup-info-card">
+      <h3>📋 查重说明</h3>
+      <ul className="dup-info-list">
+        <li>系统会对比您上传的视频与视频库中的已有视频</li>
+        <li>查重完成后，可查看重复片段的具体位置</li>
+        <li>查重过程通常需要几分钟，取决于视频大小</li>
+        <li>高相似度片段建议进行替换或裁剪</li>
+      </ul>
+
+      <h3 style={{ marginTop: 24 }}>🎬 支持格式</h3>
+      <div className="dup-format-tags">
+        {FORMAT_LIST.map((fmt) => (
+          <Tag key={fmt} variant="info">
+            {fmt}
+          </Tag>
+        ))}
+      </div>
+
+      <h3 style={{ marginTop: 24 }}>💡 温馨提示</h3>
+      <ul className="dup-info-list">
+        <li>单个文件不超过 2GB</li>
+        <li>视频时长建议不超过 60 分钟</li>
+        <li>查重结果可在「查重记录」中随时查看</li>
+      </ul>
+    </div>
+  )
+}
+
+export default InfoSidebar
@@ -0,0 +1,20 @@
+import React from "react"
+import { Button } from "@/components/ui"
+
+interface UploadActionsProps {
+  uploading: boolean
+  onSelectFile: () => void
+}
+
+/** 上传按钮区 */
+const UploadActions: React.FC<UploadActionsProps> = ({ uploading, onSelectFile }) => {
+  return (
+    <div className="dup-upload-actions">
+      <Button buttonType="primary" buttonSize="md" onClick={onSelectFile} disabled={uploading}>
+        📂 选择文件
+      </Button>
+    </div>
+  )
+}
+
+export default UploadActions
@@ -0,0 +1,16 @@
+import React from "react"
+
+/** 上传进度展示 */
+const UploadProgress: React.FC = () => {
+  return (
+    <div className="dup-progress">
+      <div className="dup-progress-circle">
+        <span className="dup-progress-icon">⏳</span>
+        <span className="dup-progress-text">查重中...</span>
+      </div>
+      <p>正在分析视频内容，请稍候...</p>
+    </div>
+  )
+}
+
+export default UploadProgress
@@ -0,0 +1,30 @@
+import React from "react"
+import { Button } from "@/components/ui"
+import type { UploadResult } from "./constants"
+
+interface UploadResultPanelProps {
+  result: UploadResult
+  onViewResult: () => void
+  onReset: () => void
+}
+
+/** 上传结果展示 */
+const UploadResultPanel: React.FC<UploadResultPanelProps> = ({ result, onViewResult, onReset }) => {
+  return (
+    <div className="dup-result">
+      <div className="dup-result-icon">✅</div>
+      <h3>查重任务已提交</h3>
+      <p>{result.message}</p>
+      <div className="dup-result-actions">
+        <Button buttonType="primary" buttonSize="md" onClick={onViewResult}>
+          查看结果
+        </Button>
+        <Button buttonType="secondary" buttonSize="md" onClick={onReset}>
+          继续上传
+        </Button>
+      </div>
+    </div>
+  )
+}
+
+export default UploadResultPanel
@@ -0,0 +1,45 @@
+import React from "react"
+import { Tag } from "@/components/ui"
+import { FORMAT_LIST } from "./constants"
+
+interface UploadZoneProps {
+  dragging: boolean
+  uploading: boolean
+  onDragOver: (e: React.DragEvent) => void
+  onDragLeave: () => void
+  onDrop: (e: React.DragEvent) => void
+  onClick: () => void
+}
+
+/** 拖拽上传区 */
+const UploadZone: React.FC<UploadZoneProps> = ({
+  dragging,
+  uploading,
+  onDragOver,
+  onDragLeave,
+  onDrop,
+  onClick,
+}) => {
+  return (
+    <div
+      className={`dup-upload-zone ${dragging ? "dragging" : ""} ${uploading ? "disabled" : ""}`}
+      onDragOver={onDragOver}
+      onDragLeave={onDragLeave}
+      onDrop={onDrop}
+      onClick={uploading ? undefined : onClick}
+    >
+      <div className="dup-upload-icon">{uploading ? "⏳" : "📁"}</div>
+      <h3>{uploading ? "正在上传并查重..." : "点击或拖拽视频文件到此区域"}</h3>
+      <p>支持 MP4、AVI、MOV、MKV 等格式，单个文件不超过 2GB</p>
+      <div className="dup-upload-formats">
+        {FORMAT_LIST.map((fmt) => (
+          <Tag key={fmt} variant="info">
+            {fmt}
+          </Tag>
+        ))}
+      </div>
+    </div>
+  )
+}
+
+export default UploadZone
@@ -0,0 +1,17 @@
+/** 支持的视频格式 */
+export const ACCEPT_FORMATS = ".mp4,.avi,.mov,.mkv,.wmv,.flv,.webm"
+export const FORMAT_LIST = ["MP4", "AVI", "MOV", "MKV", "WMV", "FLV", "WebM"]
+/** 最大文件大小：2GB */
+export const MAX_FILE_SIZE = 2 * 1024 * 1024 * 1024
+
+/** 简易 toast */
+export interface ToastState {
+  message: string
+  type: "success" | "error" | "warning"
+}
+
+/** 上传结果 */
+export interface UploadResult {
+  id: string
+  message: string
+}
@@ -0,0 +1,115 @@
+import { useState, useRef, useCallback } from "react"
+import { useMutation } from "@tanstack/react-query"
+import { uploadForDuplication } from "@/api/duplication"
+import { ACCEPT_FORMATS, FORMAT_LIST, MAX_FILE_SIZE } from "./constants"
+import type { ToastState, UploadResult } from "./constants"
+
+/**
+ * 查重上传逻辑 Hook
+ * 封装文件校验、上传 mutation、toast 提示
+ */
+export function useDuplicationUpload() {
+  const fileInputRef = useRef<HTMLInputElement>(null)
+  const [dragging, setDragging] = useState(false)
+  const [uploading, setUploading] = useState(false)
+  const [uploadResult, setUploadResult] = useState<UploadResult | null>(null)
+  const [toast, setToast] = useState<ToastState | null>(null)
+
+  /** 显示 toast */
+  const showToast = useCallback((message: string, type: "success" | "error" | "warning") => {
+    setToast({ message, type })
+    setTimeout(() => setToast(null), 3000)
+  }, [])
+
+  // 上传查重 mutation
+  const uploadMutation = useMutation({
+    mutationFn: (file: File) => uploadForDuplication(file),
+    onSuccess: (data) => {
+      setUploading(false)
+      setUploadResult({ id: data.id, message: data.message })
+      showToast("查重任务已提交", "success")
+    },
+    onError: () => {
+      setUploading(false)
+      showToast("上传失败，请重试", "error")
+    },
+  })
+
+  /** 校验并上传文件 */
+  const handleFile = useCallback(
+    (file: File) => {
+      if (file.size > MAX_FILE_SIZE) {
+        showToast("文件大小不能超过 2GB", "error")
+        return
+      }
+      const ext = file.name.toLowerCase().split(".").pop()
+      const allowedExts = ACCEPT_FORMATS.replace(/\./g, "").split(",")
+      if (!allowedExts.includes(ext || "")) {
+        showToast(`不支持的文件格式，支持：${FORMAT_LIST.join("、")}`, "error")
+        return
+      }
+      setUploading(true)
+      setUploadResult(null)
+      uploadMutation.mutate(file)
+    },
+    [uploadMutation, showToast],
+  )
+
+  /** 拖拽事件 */
+  const handleDragOver = useCallback((e: React.DragEvent) => {
+    e.preventDefault()
+    setDragging(true)
+  }, [])
+
+  const handleDragLeave = useCallback(() => {
+    setDragging(false)
+  }, [])
+
+  const handleDrop = useCallback(
+    (e: React.DragEvent) => {
+      e.preventDefault()
+      setDragging(false)
+      const file = e.dataTransfer.files[0]
+      if (file) handleFile(file)
+    },
+    [handleFile],
+  )
+
+  /** 点击选择文件 */
+  const handleSelectFile = useCallback(() => {
+    fileInputRef.current?.click()
+  }, [])
+
+  const handleFileChange = useCallback(
+    (e: React.ChangeEvent<HTMLInputElement>) => {
+      const file = e.target.files?.[0]
+      if (file) handleFile(file)
+      // 重置 input 以便重复选择同一文件
+      e.target.value = ""
+    },
+    [handleFile],
+  )
+
+  /** 重置状态 */
+  const handleReset = useCallback(() => {
+    setUploadResult(null)
+    setUploading(false)
+  }, [])
+
+  return {
+    // refs
+    fileInputRef,
+    // 状态
+    dragging,
+    uploading,
+    uploadResult,
+    toast,
+    // 事件
+    handleDragOver,
+    handleDragLeave,
+    handleDrop,
+    handleSelectFile,
+    handleFileChange,
+    handleReset,
+  }
+}
@@ -0,0 +1,41 @@
+import { useState, useEffect } from "react"
+import { useQuery } from "@tanstack/react-query"
+import { getAssets, getAssetLibraries } from "@/api/assets"
+import type { AssetItem } from "@/api/assets"
+
+/**
+ * 素材库加载 Hook
+ * 管理素材库列表、当前选中库、素材列表加载
+ */
+export function useMaterialLibrary() {
+  /* ── 素材库数据 API ── */
+  const { data: libraries = [] } = useQuery({
+    queryKey: ["asset-libraries"],
+    queryFn: getAssetLibraries,
+  })
+  const [selectedLibraryId, setSelectedLibraryId] = useState<string>("")
+
+  // 自动选中第一个视频库
+  useEffect(() => {
+    if (libraries.length > 0 && !selectedLibraryId) {
+      setSelectedLibraryId(libraries[0].id)
+    }
+  }, [libraries, selectedLibraryId])
+
+  const { data: materials = { items: [], total: 0 }, isLoading: materialsLoading } = useQuery<{
+    items: AssetItem[]
+    total: number
+  }>({
+    queryKey: ["generate-assets", selectedLibraryId],
+    queryFn: () => getAssets(selectedLibraryId),
+    enabled: !!selectedLibraryId,
+  })
+
+  return {
+    libraries,
+    selectedLibraryId,
+    setSelectedLibraryId,
+    materials,
+    materialsLoading,
+  }
+}
@@ -0,0 +1,143 @@
+import { useState, useCallback, useMemo } from "react"
+import { message } from "antd"
+import type { AssetItem } from "@/api/assets"
+import { SMART_MATCH_REASONS } from "../../constants"
+
+interface SmartMatchedResult {
+  asset: AssetItem
+  matchScore: number
+  matchReason: string
+}
+
+interface UseSmartMatchOptions {
+  materials: { items: AssetItem[]; total: number }
+  smartSelectedIds: string[]
+  onSmartSelectedIdsChange: (ids: string[]) => void
+}
+
+/**
+ * 智能素材匹配 Hook
+ * 封装 AI 匹配、换一批、全选/清空等逻辑
+ */
+export function useSmartMatch({
+  materials,
+  smartSelectedIds,
+  onSmartSelectedIdsChange,
+}: UseSmartMatchOptions) {
+  const [smartMatchInput, setSmartMatchInput] = useState("")
+  const [smartMatching, setSmartMatching] = useState(false)
+  const [smartMatchedResults, setSmartMatchedResults] = useState<SmartMatchedResult[]>([])
+  const [hasMatched, setHasMatched] = useState(false)
+
+  /* ── 智能素材匹配 ── */
+  const handleSmartMatch = useCallback(async () => {
+    if (!smartMatchInput.trim()) {
+      message.warning("请先输入视频内容描述")
+      return
+    }
+    if (materials.items.length === 0) {
+      message.warning("当前视频库暂无素材")
+      return
+    }
+
+    setSmartMatching(true)
+    setHasMatched(true)
+
+    // 模拟 AI 匹配延迟
+    await new Promise((resolve) => setTimeout(resolve, 1500))
+
+    // 从素材库中随机选取 5-8 个作为推荐结果
+    const shuffled = [...materials.items].sort(() => Math.random() - 0.5)
+    const count = Math.min(shuffled.length, 5 + Math.floor(Math.random() * 4))
+    const picked = shuffled.slice(0, count)
+
+    const results = picked.map((asset, idx) => ({
+      asset,
+      matchScore: Math.round(85 + Math.random() * 14), // 85-99 分
+      matchReason:
+        SMART_MATCH_REASONS[idx % SMART_MATCH_REASONS.length] +
+        (Math.random() > 0.5 ? "，画面质感优秀" : ""),
+    }))
+
+    // 按匹配度从高到低排序
+    results.sort((a, b) => b.matchScore - a.matchScore)
+
+    setSmartMatchedResults(results)
+    // 默认选中匹配度 >= 90 的素材
+    const defaultSelected = results.filter((r) => r.matchScore >= 90).map((r) => r.asset.id)
+    onSmartSelectedIdsChange(
+      defaultSelected.length > 0 ? defaultSelected : results.slice(0, 3).map((r) => r.asset.id),
+    )
+    setSmartMatching(false)
+  }, [smartMatchInput, materials.items, onSmartSelectedIdsChange])
+
+  const handleToggleSmartSelect = useCallback(
+    (assetId: string) => {
+      onSmartSelectedIdsChange(
+        smartSelectedIds.includes(assetId)
+          ? smartSelectedIds.filter((id) => id !== assetId)
+          : [...smartSelectedIds, assetId],
+      )
+    },
+    [smartSelectedIds, onSmartSelectedIdsChange],
+  )
+
+  const handleRefreshMatch = useCallback(async () => {
+    if (materials.items.length <= 5) {
+      message.info("视频库素材较少，无法换一批")
+      return
+    }
+    setSmartMatching(true)
+    await new Promise((resolve) => setTimeout(resolve, 800))
+
+    const remaining = materials.items.filter(
+      (m) => !smartMatchedResults.some((r) => r.asset.id === m.id),
+    )
+    const shuffled = [...remaining].sort(() => Math.random() - 0.5)
+    const count = Math.min(shuffled.length, 5 + Math.floor(Math.random() * 3))
+    const picked = shuffled.slice(0, count)
+
+    const results = picked.map((asset, idx) => ({
+      asset,
+      matchScore: Math.round(80 + Math.random() * 19),
+      matchReason:
+        SMART_MATCH_REASONS[(idx + 2) % SMART_MATCH_REASONS.length] +
+        (Math.random() > 0.5 ? "，节奏明快" : ""),
+    }))
+    results.sort((a, b) => b.matchScore - a.matchScore)
+
+    setSmartMatchedResults(results)
+    onSmartSelectedIdsChange([])
+    setSmartMatching(false)
+  }, [materials.items, smartMatchedResults, onSmartSelectedIdsChange])
+
+  const handleSelectAllMatched = useCallback(() => {
+    onSmartSelectedIdsChange(smartMatchedResults.map((r) => r.asset.id))
+  }, [smartMatchedResults, onSmartSelectedIdsChange])
+
+  const handleClearSmartSelect = useCallback(() => {
+    onSmartSelectedIdsChange([])
+  }, [onSmartSelectedIdsChange])
+
+  /* ── 计算已选智能匹配素材的总时长 ── */
+  const smartSelectedTotalDuration = useMemo(() => {
+    return smartMatchedResults
+      .filter((r) => smartSelectedIds.includes(r.asset.id))
+      .reduce((sum, r) => sum + (r.asset.duration || 0), 0)
+  }, [smartMatchedResults, smartSelectedIds])
+
+  return {
+    smartMatchInput,
+    setSmartMatchInput,
+    smartMatching,
+    smartMatchedResults,
+    hasMatched,
+    smartSelectedIds,
+    handleSmartMatch,
+    handleToggleSmartSelect,
+    handleRefreshMatch,
+    handleSelectAllMatched,
+    handleClearSmartSelect,
+    smartSelectedTotalDuration,
+  }
+}
@@ -1,20 +1,11 @@
 /**
 * Step 2 素材选择 Hook
- * 封装素材库加载、手动选择、智能匹配等逻辑
+ * 组合素材库加载 + 智能匹配两个子 Hook
 */
-import { useState, useCallback, useEffect, useMemo } from "react"
-import { message } from "antd"
-import { useQuery } from "@tanstack/react-query"
-import { getAssets, getAssetLibraries } from "@/api/assets"
-import type { AssetItem } from "@/api/assets"
+import { useCallback } from "react"
 import { formatDuration } from "../utils/formatDuration"
-import { SMART_MATCH_REASONS } from "../constants"
-
-interface SmartMatchedResult {
-  asset: AssetItem
-  matchScore: number
-  matchReason: string
-}
+import { useMaterialLibrary } from "./step2-materials/useMaterialLibrary"
+import { useSmartMatch } from "./step2-materials/useSmartMatch"

 interface UseStep2MaterialsProps {
  materialMode: "manual" | "auto"
@@ -33,34 +24,14 @@ export function useStep2Materials({
  smartSelectedIds,
  onSmartSelectedIdsChange,
 }: UseStep2MaterialsProps) {
-  /* ── 素材库数据 API ── */
-  const { data: libraries = [] } = useQuery({
-    queryKey: ["asset-libraries"],
-    queryFn: getAssetLibraries,
+  const { libraries, selectedLibraryId, setSelectedLibraryId, materials, materialsLoading } =
+    useMaterialLibrary()
+
+  const smartMatch = useSmartMatch({
+    materials,
+    smartSelectedIds,
+    onSmartSelectedIdsChange,
  })
-  const [selectedLibraryId, setSelectedLibraryId] = useState<string>("")
-
-  // 自动选中第一个视频库
-  useEffect(() => {
-    if (libraries.length > 0 && !selectedLibraryId) {
-      setSelectedLibraryId(libraries[0].id)
-    }
-  }, [libraries, selectedLibraryId])
-
-  const { data: materials = { items: [], total: 0 }, isLoading: materialsLoading } = useQuery<{
-    items: AssetItem[]
-    total: number
-  }>({
-    queryKey: ["generate-assets", selectedLibraryId],
-    queryFn: () => getAssets(selectedLibraryId),
-    enabled: !!selectedLibraryId,
-  })
-
-  /* ── 智能素材匹配状态 ── */
-  const [smartMatchInput, setSmartMatchInput] = useState("")
-  const [smartMatching, setSmartMatching] = useState(false)
-  const [smartMatchedResults, setSmartMatchedResults] = useState<SmartMatchedResult[]>([])
-  const [hasMatched, setHasMatched] = useState(false)

  /* ── 手动选择素材 ── */
  const handleToggleMaterial = useCallback(
@@ -74,103 +45,6 @@ export function useStep2Materials({
    [selectedMaterials, onSelectedMaterialsChange],
  )

-  /* ── 智能素材匹配 ── */
-  const handleSmartMatch = useCallback(async () => {
-    if (!smartMatchInput.trim()) {
-      message.warning("请先输入视频内容描述")
-      return
-    }
-    if (materials.items.length === 0) {
-      message.warning("当前视频库暂无素材")
-      return
-    }
-
-    setSmartMatching(true)
-    setHasMatched(true)
-
-    // 模拟 AI 匹配延迟
-    await new Promise((resolve) => setTimeout(resolve, 1500))
-
-    // 从素材库中随机选取 5-8 个作为推荐结果
-    const shuffled = [...materials.items].sort(() => Math.random() - 0.5)
-    const count = Math.min(shuffled.length, 5 + Math.floor(Math.random() * 4))
-    const picked = shuffled.slice(0, count)
-
-    const results = picked.map((asset, idx) => ({
-      asset,
-      matchScore: Math.round(85 + Math.random() * 14), // 85-99 分
-      matchReason:
-        SMART_MATCH_REASONS[idx % SMART_MATCH_REASONS.length] +
-        (Math.random() > 0.5 ? "，画面质感优秀" : ""),
-    }))
-
-    // 按匹配度从高到低排序
-    results.sort((a, b) => b.matchScore - a.matchScore)
-
-    setSmartMatchedResults(results)
-    // 默认选中匹配度 >= 90 的素材
-    const defaultSelected = results.filter((r) => r.matchScore >= 90).map((r) => r.asset.id)
-    onSmartSelectedIdsChange(
-      defaultSelected.length > 0 ? defaultSelected : results.slice(0, 3).map((r) => r.asset.id),
-    )
-    setSmartMatching(false)
-  }, [smartMatchInput, materials.items, onSmartSelectedIdsChange])
-
-  const handleToggleSmartSelect = useCallback(
-    (assetId: string) => {
-      onSmartSelectedIdsChange(
-        smartSelectedIds.includes(assetId)
-          ? smartSelectedIds.filter((id) => id !== assetId)
-          : [...smartSelectedIds, assetId],
-      )
-    },
-    [smartSelectedIds, onSmartSelectedIdsChange],
-  )
-
-  const handleRefreshMatch = useCallback(async () => {
-    if (materials.items.length <= 5) {
-      message.info("视频库素材较少，无法换一批")
-      return
-    }
-    setSmartMatching(true)
-    await new Promise((resolve) => setTimeout(resolve, 800))
-
-    const remaining = materials.items.filter(
-      (m) => !smartMatchedResults.some((r) => r.asset.id === m.id),
-    )
-    const shuffled = [...remaining].sort(() => Math.random() - 0.5)
-    const count = Math.min(shuffled.length, 5 + Math.floor(Math.random() * 3))
-    const picked = shuffled.slice(0, count)
-
-    const results = picked.map((asset, idx) => ({
-      asset,
-      matchScore: Math.round(80 + Math.random() * 19),
-      matchReason:
-        SMART_MATCH_REASONS[(idx + 2) % SMART_MATCH_REASONS.length] +
-        (Math.random() > 0.5 ? "，节奏明快" : ""),
-    }))
-    results.sort((a, b) => b.matchScore - a.matchScore)
-
-    setSmartMatchedResults(results)
-    onSmartSelectedIdsChange([])
-    setSmartMatching(false)
-  }, [materials.items, smartMatchedResults, onSmartSelectedIdsChange])
-
-  const handleSelectAllMatched = useCallback(() => {
-    onSmartSelectedIdsChange(smartMatchedResults.map((r) => r.asset.id))
-  }, [smartMatchedResults, onSmartSelectedIdsChange])
-
-  const handleClearSmartSelect = useCallback(() => {
-    onSmartSelectedIdsChange([])
-  }, [onSmartSelectedIdsChange])
-
-  /* ── 计算已选智能匹配素材的总时长 ── */
-  const smartSelectedTotalDuration = useMemo(() => {
-    return smartMatchedResults
-      .filter((r) => smartSelectedIds.includes(r.asset.id))
-      .reduce((sum, r) => sum + (r.asset.duration || 0), 0)
-  }, [smartMatchedResults, smartSelectedIds])
-
  return {
    // 素材库
    libraries,
@@ -185,18 +59,18 @@ export function useStep2Materials({
    selectedMaterials,
    handleToggleMaterial,
    // 智能匹配
-    smartMatchInput,
-    setSmartMatchInput,
-    smartMatching,
-    smartMatchedResults,
-    hasMatched,
-    smartSelectedIds,
-    handleSmartMatch,
-    handleToggleSmartSelect,
-    handleRefreshMatch,
-    handleSelectAllMatched,
-    handleClearSmartSelect,
-    smartSelectedTotalDuration,
+    smartMatchInput: smartMatch.smartMatchInput,
+    setSmartMatchInput: smartMatch.setSmartMatchInput,
+    smartMatching: smartMatch.smartMatching,
+    smartMatchedResults: smartMatch.smartMatchedResults,
+    hasMatched: smartMatch.hasMatched,
+    smartSelectedIds: smartMatch.smartSelectedIds,
+    handleSmartMatch: smartMatch.handleSmartMatch,
+    handleToggleSmartSelect: smartMatch.handleToggleSmartSelect,
+    handleRefreshMatch: smartMatch.handleRefreshMatch,
+    handleSelectAllMatched: smartMatch.handleSelectAllMatched,
+    handleClearSmartSelect: smartMatch.handleClearSmartSelect,
+    smartSelectedTotalDuration: smartMatch.smartSelectedTotalDuration,
    // utils
    formatDuration,
  }
@@ -1,25 +1,13 @@
 import React from "react"
-import { Button, Descriptions, Tooltip } from "antd"
-import { CopyOutlined, ThunderboltOutlined } from "@ant-design/icons"
-import type { TemplateItem, TemplateSegment } from "@/api/templates"
-import {
-  gradientForCategory,
-  getTypeColor,
-  formatDuration,
-  formatConfig,
-  getMaterialTypeLabel,
-  calcTotalSegmentDuration,
-} from "../../utils/templateLibrary"
+import { Descriptions } from "antd"
+import type { TemplateDetailModalProps } from "./template-detail-modal/types"
+import PreviewArea from "./template-detail-modal/PreviewArea"
+import SegmentList from "./template-detail-modal/SegmentList"
+import StyleConfig from "./template-detail-modal/StyleConfig"
+import DetailFooter from "./template-detail-modal/DetailFooter"
+import { getTypeColor, formatDuration } from "../../utils/templateLibrary"
 import { TEMPLATE_TYPES } from "../../constants/templateLibrary"
-
-interface TemplateDetailModalProps {
-  template: TemplateItem
-  isFavorite: boolean
-  onClose: () => void
-  onToggleFavorite: (id: string) => void
-  onUse: (template: TemplateItem) => void
-  onCopy: (template: TemplateItem) => void
-}
+import { calcTotalSegmentDuration } from "../../utils/templateLibrary"

 export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
  template,
@@ -31,6 +19,7 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
 }) => {
  const segments = template.segments ?? []
  const totalSegmentDuration = calcTotalSegmentDuration(segments)
+  const typeInfo = TEMPLATE_TYPES.find((t) => t.type === template.category)

  return (
    <div className="xx-template-modal-overlay" onClick={onClose}>
@@ -38,33 +27,8 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
        className="xx-template-modal xx-template-modal-wide"
        onClick={(e) => e.stopPropagation()}
      >
-        {/* 关闭按钮 */}
-        <button className="xx-template-modal-close" onClick={onClose} title="关闭">
-          ✕
-        </button>
+        <PreviewArea template={template} onClose={onClose} />

-        {/* 预览区域 */}
-        <div
-          className="xx-template-modal-preview"
-          style={{ background: gradientForCategory(template.category) }}
-        >
-          {template.thumbnail_url ? (
-            <img
-              src={template.thumbnail_url}
-              alt={template.name}
-              className="xx-template-modal-thumb-img"
-            />
-          ) : (
-            <div className="xx-template-modal-preview-content">
-              <span className="xx-template-preview-icon">
-                {TEMPLATE_TYPES.find((t) => t.type === template.category)?.icon ?? "📋"}
-              </span>
-              <span className="xx-template-preview-title">{template.name}</span>
-            </div>
-          )}
-        </div>
-
-        {/* 内容区域 */}
        <div className="xx-template-modal-content">
          {/* 标题行 */}
          <div className="xx-template-modal-title-row">
@@ -76,7 +40,7 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
                background: `${getTypeColor(template.category)}18`,
              }}
            >
-              {TEMPLATE_TYPES.find((t) => t.type === template.category)?.icon} {template.category}
+              {typeInfo?.icon} {template.category}
            </span>
          </div>

@@ -123,95 +87,15 @@ export const TemplateDetailModal: React.FC<TemplateDetailModalProps> = ({
            ]}
          />

-          {/* 素材规则（片段配置） */}
-          {segments.length > 0 && (
-            <div className="xx-template-modal-section">
-              <h4>🎬 素材规则</h4>
-              <div className="xx-template-modal-clip-list">
-                {segments
-                  .sort((a, b) => a.segment_order - b.segment_order)
-                  .map((seg: TemplateSegment, idx: number) => (
-                    <div key={seg.id ?? idx} className="xx-template-modal-clip-item">
-                      <span className="xx-template-modal-clip-order">#{seg.segment_order}</span>
-                      <span
-                        className="xx-template-modal-clip-badge"
-                        style={{
-                          color: seg.material_type ? getTypeColor(seg.material_type) : "#64748b",
-                          background: seg.material_type
-                            ? `${getTypeColor(seg.material_type)}18`
-                            : "#f1f5f9",
-                        }}
-                      >
-                        {getMaterialTypeLabel(seg.material_type)}
-                      </span>
-                      <span className="xx-template-modal-clip-desc">
-                        {seg.description || `片段 ${seg.segment_order}`}
-                      </span>
-                      <Tooltip title={`时长范围: ${seg.duration_min}秒 - ${seg.duration_max}秒`}>
-                        <span className="xx-template-modal-clip-duration">
-                          {seg.duration_min}-{seg.duration_max}秒
-                        </span>
-                      </Tooltip>
-                    </div>
-                  ))}
-              </div>
-              <div className="xx-template-modal-total-duration">
-                预估总时长：{formatDuration(Math.round(totalSegmentDuration))}
-              </div>
-            </div>
-          )}
-
-          {/* 样式配置 */}
-          <div className="xx-template-modal-section">
-            <h4>🎨 样式配置</h4>
-            <div className="xx-template-modal-style-grid">
-              <div className="xx-template-modal-style-item">
-                <span className="xx-template-modal-style-label">字幕样式</span>
-                <span className="xx-template-modal-style-value">
-                  {formatConfig(template.subtitle_config)}
-                </span>
-              </div>
-              <div className="xx-template-modal-style-item">
-                <span className="xx-template-modal-style-label">标题样式</span>
-                <span className="xx-template-modal-style-value">
-                  {formatConfig(template.title_config)}
-                </span>
-              </div>
-              <div className="xx-template-modal-style-item">
-                <span className="xx-template-modal-style-label">BGM 配置</span>
-                <span className="xx-template-modal-style-value">
-                  {formatConfig(template.bgm_config)}
-                </span>
-              </div>
-              <div className="xx-template-modal-style-item">
-                <span className="xx-template-modal-style-label">视频比例</span>
-                <span className="xx-template-modal-style-value">
-                  {template.aspect_ratio ?? "16:9"}
-                </span>
-              </div>
-            </div>
-          </div>
-
-          {/* 统计信息 */}
-          <div className="xx-template-modal-stats">
-            <span>已使用 {template.usage_count ?? 0} 次</span>
-            <button
-              className={`xx-template-modal-fav-btn${isFavorite ? " is-favorite" : ""}`}
-              onClick={() => onToggleFavorite(template.id)}
-            >
-              {isFavorite ? "★ 已收藏" : "☆ 收藏"}
-            </button>
-          </div>
-
-          {/* 操作按钮 */}
-          <div className="xx-template-modal-actions">
-            <Button icon={<CopyOutlined />} onClick={() => onCopy(template)}>
-              复制模板
-            </Button>
-            <Button type="primary" icon={<ThunderboltOutlined />} onClick={() => onUse(template)}>
-              使用此模板生成
-            </Button>
-          </div>
+          <SegmentList segments={segments} totalDuration={totalSegmentDuration} />
+          <StyleConfig template={template} />
+          <DetailFooter
+            template={template}
+            isFavorite={isFavorite}
+            onToggleFavorite={onToggleFavorite}
+            onUse={onUse}
+            onCopy={onCopy}
+          />
        </div>
      </div>
    </div>
@@ -0,0 +1,46 @@
+import React from "react"
+import { Button } from "antd"
+import { CopyOutlined, ThunderboltOutlined } from "@ant-design/icons"
+import type { TemplateItem } from "@/api/templates"
+
+interface DetailFooterProps {
+  template: TemplateItem
+  isFavorite: boolean
+  onToggleFavorite: (id: string) => void
+  onUse: (template: TemplateItem) => void
+  onCopy: (template: TemplateItem) => void
+}
+
+/** 底部操作区：统计 + 收藏 + 按钮 */
+const DetailFooter: React.FC<DetailFooterProps> = ({
+  template,
+  isFavorite,
+  onToggleFavorite,
+  onUse,
+  onCopy,
+}) => {
+  return (
+    <>
+      <div className="xx-template-modal-stats">
+        <span>已使用 {template.usage_count ?? 0} 次</span>
+        <button
+          className={`xx-template-modal-fav-btn${isFavorite ? " is-favorite" : ""}`}
+          onClick={() => onToggleFavorite(template.id)}
+        >
+          {isFavorite ? "★ 已收藏" : "☆ 收藏"}
+        </button>
+      </div>
+
+      <div className="xx-template-modal-actions">
+        <Button icon={<CopyOutlined />} onClick={() => onCopy(template)}>
+          复制模板
+        </Button>
+        <Button type="primary" icon={<ThunderboltOutlined />} onClick={() => onUse(template)}>
+          使用此模板生成
+        </Button>
+      </div>
+    </>
+  )
+}
+
+export default DetailFooter
@@ -0,0 +1,39 @@
+import React from "react"
+import type { TemplateItem } from "@/api/templates"
+import { gradientForCategory } from "../../../utils/templateLibrary"
+import { TEMPLATE_TYPES } from "../../../constants/templateLibrary"
+
+interface PreviewAreaProps {
+  template: TemplateItem
+  onClose: () => void
+}
+
+/** 预览区域 */
+const PreviewArea: React.FC<PreviewAreaProps> = ({ template, onClose }) => {
+  const typeInfo = TEMPLATE_TYPES.find((t) => t.type === template.category)
+
+  return (
+    <div
+      className="xx-template-modal-preview"
+      style={{ background: gradientForCategory(template.category) }}
+    >
+      <button className="xx-template-modal-close" onClick={onClose} title="关闭">
+        ✕
+      </button>
+      {template.thumbnail_url ? (
+        <img
+          src={template.thumbnail_url}
+          alt={template.name}
+          className="xx-template-modal-thumb-img"
+        />
+      ) : (
+        <div className="xx-template-modal-preview-content">
+          <span className="xx-template-preview-icon">{typeInfo?.icon ?? "📋"}</span>
+          <span className="xx-template-preview-title">{template.name}</span>
+        </div>
+      )}
+    </div>
+  )
+}
+
+export default PreviewArea
@@ -0,0 +1,53 @@
+import React from "react"
+import { Tooltip } from "antd"
+import type { TemplateSegment } from "@/api/templates"
+import { getMaterialTypeLabel, getTypeColor, formatDuration } from "../../../utils/templateLibrary"
+
+interface SegmentListProps {
+  segments: TemplateSegment[]
+  totalDuration: number
+}
+
+/** 素材规则 / 片段列表 */
+const SegmentList: React.FC<SegmentListProps> = ({ segments, totalDuration }) => {
+  if (segments.length === 0) return null
+
+  return (
+    <div className="xx-template-modal-section">
+      <h4>🎬 素材规则</h4>
+      <div className="xx-template-modal-clip-list">
+        {segments
+          .sort((a, b) => a.segment_order - b.segment_order)
+          .map((seg, idx) => (
+            <div key={seg.id ?? idx} className="xx-template-modal-clip-item">
+              <span className="xx-template-modal-clip-order">#{seg.segment_order}</span>
+              <span
+                className="xx-template-modal-clip-badge"
+                style={{
+                  color: seg.material_type ? getTypeColor(seg.material_type) : "#64748b",
+                  background: seg.material_type
+                    ? `${getTypeColor(seg.material_type)}18`
+                    : "#f1f5f9",
+                }}
+              >
+                {getMaterialTypeLabel(seg.material_type)}
+              </span>
+              <span className="xx-template-modal-clip-desc">
+                {seg.description || `片段 ${seg.segment_order}`}
+              </span>
+              <Tooltip title={`时长范围: ${seg.duration_min}秒 - ${seg.duration_max}秒`}>
+                <span className="xx-template-modal-clip-duration">
+                  {seg.duration_min}-{seg.duration_max}秒
+                </span>
+              </Tooltip>
+            </div>
+          ))}
+      </div>
+      <div className="xx-template-modal-total-duration">
+        预估总时长：{formatDuration(Math.round(totalDuration))}
+      </div>
+    </div>
+  )
+}
+
+export default SegmentList
@@ -0,0 +1,33 @@
+import React from "react"
+import type { TemplateItem } from "@/api/templates"
+import { formatConfig } from "../../../utils/templateLibrary"
+
+interface StyleConfigProps {
+  template: TemplateItem
+}
+
+/** 样式配置网格 */
+const StyleConfig: React.FC<StyleConfigProps> = ({ template }) => {
+  const items = [
+    { label: "字幕样式", value: formatConfig(template.subtitle_config) },
+    { label: "标题样式", value: formatConfig(template.title_config) },
+    { label: "BGM 配置", value: formatConfig(template.bgm_config) },
+    { label: "视频比例", value: template.aspect_ratio ?? "16:9" },
+  ]
+
+  return (
+    <div className="xx-template-modal-section">
+      <h4>🎨 样式配置</h4>
+      <div className="xx-template-modal-style-grid">
+        {items.map((item) => (
+          <div key={item.label} className="xx-template-modal-style-item">
+            <span className="xx-template-modal-style-label">{item.label}</span>
+            <span className="xx-template-modal-style-value">{item.value}</span>
+          </div>
+        ))}
+      </div>
+    </div>
+  )
+}
+
+export default StyleConfig
@@ -0,0 +1,6 @@
+export { TemplateDetailModal } from "../TemplateDetailModal"
+export * from "./types"
+export { default as PreviewArea } from "./PreviewArea"
+export { default as SegmentList } from "./SegmentList"
+export { default as StyleConfig } from "./StyleConfig"
+export { default as DetailFooter } from "./DetailFooter"
@@ -0,0 +1,10 @@
+import type { TemplateItem } from "@/api/templates"
+
+export interface TemplateDetailModalProps {
+  template: TemplateItem
+  isFavorite: boolean
+  onClose: () => void
+  onToggleFavorite: (id: string) => void
+  onUse: (template: TemplateItem) => void
+  onCopy: (template: TemplateItem) => void
+}
@@ -9,7 +9,7 @@
 * - 删除素材
 */
 import React from "react"
-import { AudioOutlined, PlusOutlined, RobotOutlined } from "@ant-design/icons"
+import { PlusOutlined, RobotOutlined } from "@ant-design/icons"
 import { Button, Modal } from "@/components/ui"
 import PageHead from "@/components/layout/PageHead"
 import { useVoiceMaterials } from "./hooks/useVoiceMaterials"
@@ -315,8 +315,8 @@ const VoiceMaterialLibrary: React.FC = () => {
          voiceId={ttsVoiceId}
          speed={ttsSpeed}
          status={ttsStatus}
-          audioUrl={ttsAudioUrl}
-          error={ttsError}
+          audioUrl={ttsAudioUrl ?? ""}
+          error={ttsError ?? ""}
          presetVoices={presetVoices}
          onClose={handleTtsClose}
          onTextChange={setTtsText}
@@ -1,11 +1,10 @@
-import React, { useState, useRef } from "react"
-import { UploadOutlined, SoundOutlined, CloseOutlined } from "@ant-design/icons"
+import React, { useState } from "react"
 import { Button, Input } from "@/components/ui"
 import { type TagItem } from "@/api/tags"
 import { type VoiceGender, type VoiceMaterial } from "../types"
-import { GENDER_OPTIONS } from "../constants"
-import { genderClass, formatFileSize } from "../utils/format"
 import TagSelector from "./TagSelector"
+import FileUploadField from "./material-form/FileUploadField"
+import GenderSelector from "./material-form/GenderSelector"

 export interface MaterialFormProps {
  initial?: VoiceMaterial
@@ -33,7 +32,6 @@ const MaterialForm: React.FC<MaterialFormProps> = ({
  const [gender, setGender] = useState<VoiceGender>(initial?.gender ?? "female")
  const [selectedTagIds, setSelectedTagIds] = useState<string[]>(initial?.tagIds ?? [])
  const [file, setFile] = useState<File | undefined>(undefined)
-  const fileInputRef = useRef<HTMLInputElement>(null)

  const handleSubmit = () => {
    if (!name.trim()) return
@@ -53,65 +51,10 @@ const MaterialForm: React.FC<MaterialFormProps> = ({

  return (
    <div className="vmat-form">
-      {/* 音频文件上传（编辑模式不显示） */}
      {!initial && (
-        <div className="vmat-form-field">
-          <label className="vmat-form-label">音频文件 *</label>
-          <div
-            className="vmat-upload-zone"
-            onClick={() => fileInputRef.current?.click()}
-            onDragOver={(e) => e.preventDefault()}
-            onDrop={(e) => {
-              e.preventDefault()
-              const f = e.dataTransfer.files[0]
-              if (f?.type.startsWith("audio/")) setFile(f)
-            }}
-          >
-            <input
-              ref={fileInputRef}
-              type="file"
-              accept="audio/*"
-              style={{ display: "none" }}
-              onChange={(e) => {
-                const f = e.target.files?.[0]
-                if (f) setFile(f)
-              }}
-            />
-            {file ? (
-              <div className="vmat-upload-selected">
-                <SoundOutlined className="vmat-upload-icon" />
-                <span className="vmat-upload-filename">{file.name}</span>
-                <span className="vmat-upload-filesize">{formatFileSize(file.size)}</span>
-                <button
-                  type="button"
-                  className="vmat-upload-clear"
-                  onClick={(e) => {
-                    e.stopPropagation()
-                    setFile(undefined)
-                  }}
-                >
-                  <CloseOutlined />
-                </button>
-              </div>
-            ) : (
-              <div className="vmat-upload-placeholder">
-                <UploadOutlined className="vmat-upload-icon" />
-                <p>点击或拖拽音频文件到此处</p>
-                <span>支持 MP3、WAV、AAC、FLAC 等格式</span>
-              </div>
-            )}
-          </div>
-          {/* 上传进度条 */}
-          {uploadProgress !== null && uploadProgress !== undefined && (
-            <div className="vmat-upload-progress">
-              <div className="vmat-upload-progress-bar" style={{ width: `${uploadProgress}%` }} />
-              <span className="vmat-upload-progress-text">{uploadProgress}%</span>
-            </div>
-          )}
-        </div>
+        <FileUploadField file={file} onChange={setFile} uploadProgress={uploadProgress} />
      )}

-      {/* 名称 */}
      <div className="vmat-form-field">
        <label className="vmat-form-label">名称 *</label>
        <Input
@@ -122,7 +65,6 @@ const MaterialForm: React.FC<MaterialFormProps> = ({
        />
      </div>

-      {/* 音色描述 */}
      <div className="vmat-form-field">
        <label className="vmat-form-label">音色描述</label>
        <Input.TextArea
@@ -134,25 +76,8 @@ const MaterialForm: React.FC<MaterialFormProps> = ({
        />
      </div>

-      {/* 性别 */}
-      <div className="vmat-form-field">
-        <label className="vmat-form-label">性别</label>
-        <div className="vmat-gender-group">
-          {GENDER_OPTIONS.map((opt) => (
-            <button
-              key={opt.value}
-              type="button"
-              className={`vmat-gender-btn${gender === opt.value ? " active" : ""} ${genderClass(opt.value)}`}
-              onClick={() => setGender(opt.value)}
-            >
-              {opt.icon}
-              {opt.label}
-            </button>
-          ))}
-        </div>
-      </div>
+      <GenderSelector value={gender} onChange={setGender} />

-      {/* 风格标签 */}
      <div className="vmat-form-field">
        <label className="vmat-form-label">风格标签</label>
        <TagSelector
@@ -164,7 +89,6 @@ const MaterialForm: React.FC<MaterialFormProps> = ({
        />
      </div>

-      {/* 操作按钮 */}
      <div className="vmat-form-actions">
        <Button buttonType="ghost" buttonSize="md" onClick={onCancel}>
          取消
@@ -35,7 +35,7 @@ const TtsModal: React.FC<TtsModalProps> = ({
  audioUrl,
  error,
  presetVoices,
-  onClose,
+  onClose: _onClose,
  onTextChange,
  onVoiceChange,
  onSpeedChange,
@@ -1,45 +1,12 @@
-import React, { useRef } from "react"
-import {
-  AudioOutlined,
-  PlayCircleOutlined,
-  PauseCircleOutlined,
-  EditOutlined,
-  DeleteOutlined,
-  CheckOutlined,
-  SoundOutlined,
-  MutedOutlined,
-} from "@ant-design/icons"
-import { Tooltip } from "antd"
-import { Tag } from "@/components/ui"
-import { type TagItem } from "@/api/tags"
-import { type VoiceMaterial } from "../types"
-import { MAX_CARD_TAGS, TAG_VARIANTS } from "../constants"
-import {
-  genderClass,
-  genderIcon,
-  genderLabel,
-  formatDuration,
-  formatFileSize,
-  formatDate,
-} from "../utils/format"
-
-export interface VoiceCardProps {
-  material: VoiceMaterial
-  isPlaying: boolean
-  currentTime: number
-  isSelected: boolean
-  batchMode: boolean
-  volume: number
-  tagMap: Map<string, TagItem>
-  onPlay: () => void
-  onPause: () => void
-  onSeek: (time: number) => void
-  onEdit: () => void
-  onDelete: () => void
-  onToggleSelect: (id: string) => void
-  onVolumeChange: (e: React.ChangeEvent<HTMLInputElement>) => void
-  onToggleMute: () => void
-}
+import React from "react"
+import { type VoiceCardProps } from "./voice-material-card/types"
+import BatchCheckbox from "./voice-material-card/BatchCheckbox"
+import CardActions from "./voice-material-card/CardActions"
+import CardHeader from "./voice-material-card/CardHeader"
+import CardTags from "./voice-material-card/CardTags"
+import CardMeta from "./voice-material-card/CardMeta"
+import CardPlayer from "./voice-material-card/CardPlayer"
+import { genderClass } from "../utils/format"

 const VoiceMaterialCard: React.FC<VoiceCardProps> = ({
  material,
@@ -58,29 +25,6 @@ const VoiceMaterialCard: React.FC<VoiceCardProps> = ({
  onVolumeChange,
  onToggleMute,
 }) => {
-  const progressRef = useRef<HTMLDivElement>(null)
-
-  const handleProgressMouseDown = (e: React.MouseEvent<HTMLDivElement>) => {
-    if (!progressRef.current) return
-    e.preventDefault()
-    const doSeek = (ev: MouseEvent) => {
-      if (!progressRef.current) return
-      const rect = progressRef.current.getBoundingClientRect()
-      const percent = Math.max(0, Math.min(1, (ev.clientX - rect.left) / rect.width))
-      onSeek(percent * material.duration)
-    }
-    doSeek(e.nativeEvent)
-    const handleMove = (ev: MouseEvent) => doSeek(ev)
-    const handleUp = () => {
-      document.removeEventListener("mousemove", handleMove)
-      document.removeEventListener("mouseup", handleUp)
-    }
-    document.addEventListener("mousemove", handleMove)
-    document.addEventListener("mouseup", handleUp)
-  }
-
-  const progress = material.duration > 0 ? (currentTime / material.duration) * 100 : 0
-
  const handleCardClick = () => {
    if (batchMode) {
      onToggleSelect(material.id)
@@ -92,154 +36,37 @@ const VoiceMaterialCard: React.FC<VoiceCardProps> = ({
      className={`vmat-card ${genderClass(material.gender)}${isPlaying ? " playing" : ""}${isSelected ? " selected" : ""}${batchMode ? " batch-mode" : ""}`}
      onClick={handleCardClick}
    >
-      {/* 批量选择 checkbox */}
-      {(batchMode || isSelected) && (
-        <div
-          className={`vmat-card-checkbox vmat-checkbox${isSelected ? " checked" : ""}`}
-          onClick={(e) => {
-            e.stopPropagation()
-            onToggleSelect(material.id)
-          }}
-        >
-          {isSelected && <CheckOutlined />}
-        </div>
-      )}
+      <BatchCheckbox
+        isSelected={isSelected}
+        visible={batchMode || isSelected}
+        onToggle={() => onToggleSelect(material.id)}
+      />
+      <CardActions onEdit={onEdit} onDelete={onDelete} />
+      <CardHeader material={material} />

-      {/* 操作按钮 */}
-      <div className="vmat-card-actions">
-        <button
-          type="button"
-          className="vmat-card-action-btn"
-          onClick={(e) => {
-            e.stopPropagation()
-            onEdit()
-          }}
-          title="编辑"
-        >
-          <EditOutlined />
-        </button>
-        <button
-          type="button"
-          className="vmat-card-action-btn vmat-card-action-btn--danger"
-          onClick={(e) => {
-            e.stopPropagation()
-            onDelete()
-          }}
-          title="删除"
-        >
-          <DeleteOutlined />
-        </button>
-      </div>
-
-      {/* 头部：图标 + 名称 + 性别 */}
-      <div className="vmat-card-header">
-        <div className="vmat-card-avatar">
-          <AudioOutlined />
-        </div>
-        <div className="vmat-card-title-area">
-          <h4 className="vmat-card-name" title={material.name}>
-            {material.name}
-          </h4>
-          <span className={`vmat-card-gender ${genderClass(material.gender)}`}>
-            {genderIcon(material.gender)}
-            {genderLabel(material.gender)}
-          </span>
-        </div>
-      </div>
-
-      {/* 描述 */}
      {material.description && <p className="vmat-card-desc">{material.description}</p>}

-      {/* 标签 */}
-      <div className="vmat-card-tags">
-        {material.tagIds.length === 0 ? (
-          <span
-            className="vmat-tag-empty"
-            onClick={(e) => {
-              e.stopPropagation()
-              onEdit()
-            }}
-          >
-            添加标签
-          </span>
-        ) : (
-          <>
-            {material.tagIds.slice(0, MAX_CARD_TAGS).map((tagId, i) => (
-              <Tag key={tagId} variant={TAG_VARIANTS[i % TAG_VARIANTS.length]}>
-                {tagMap.get(tagId)?.name ?? tagId}
-              </Tag>
-            ))}
-            {material.tagIds.length > MAX_CARD_TAGS && (
-              <Tooltip
-                title={material.tagIds
-                  .slice(MAX_CARD_TAGS)
-                  .map((id) => tagMap.get(id)?.name ?? id)
-                  .join("、")}
-              >
-                <Tag className="vmat-tag-overflow">+{material.tagIds.length - MAX_CARD_TAGS}</Tag>
-              </Tooltip>
-            )}
-          </>
-        )}
-      </div>
-
-      {/* 元信息 */}
-      <div className="vmat-card-meta">
-        <span>{formatDuration(material.duration)}</span>
-        <span>{formatFileSize(material.fileSize)}</span>
-        <span>{formatDate(material.createdAt)}</span>
-      </div>
-
-      {/* 播放控制 */}
-      <div className="vmat-card-player">
-        <button
-          type="button"
-          className="vmat-play-btn"
-          onClick={(e) => {
-            e.stopPropagation()
-            isPlaying ? onPause() : onPlay()
-          }}
-          disabled={!material.fileUrl}
-        >
-          {isPlaying ? <PauseCircleOutlined /> : <PlayCircleOutlined />}
-        </button>
-        <div ref={progressRef} className="vmat-progress" onMouseDown={handleProgressMouseDown}>
-          <div className="vmat-progress-bar" style={{ width: `${progress}%` }} />
-          {isPlaying && <div className="vmat-progress-thumb" style={{ left: `${progress}%` }} />}
-        </div>
-        <span className="vmat-time">
-          {isPlaying ? formatDuration(currentTime) : formatDuration(material.duration)}
-        </span>
-        {/* 音量控制 */}
-        <div className="vmat-volume">
-          <button
-            type="button"
-            className="vmat-volume-btn"
-            onClick={(e) => {
-              e.stopPropagation()
-              onToggleMute()
-            }}
-            title={volume === 0 ? "取消静音" : "静音"}
-          >
-            {volume === 0 ? <MutedOutlined /> : <SoundOutlined />}
-          </button>
-          <input
-            type="range"
-            className="vmat-volume-slider"
-            min={0}
-            max={1}
-            step={0.05}
-            value={volume}
-            onChange={(e) => {
-              e.stopPropagation()
-              onVolumeChange(e)
-            }}
-            onClick={(e) => e.stopPropagation()}
-          />
-        </div>
-      </div>
+      <CardTags tagIds={material.tagIds} tagMap={tagMap} onEdit={onEdit} />
+      <CardMeta
+        duration={material.duration}
+        fileSize={material.fileSize}
+        createdAt={material.createdAt}
+      />
+      <CardPlayer
+        isPlaying={isPlaying}
+        currentTime={currentTime}
+        duration={material.duration}
+        volume={volume}
+        fileUrl={material.fileUrl}
+        onPlay={onPlay}
+        onPause={onPause}
+        onSeek={onSeek}
+        onVolumeChange={onVolumeChange}
+        onToggleMute={onToggleMute}
+      />
    </div>
  )
 }

 export default VoiceMaterialCard
+export type { VoiceCardProps }
@@ -0,0 +1,73 @@
+import React, { useRef } from "react"
+import { UploadOutlined, SoundOutlined, CloseOutlined } from "@ant-design/icons"
+import { formatFileSize } from "../../utils/format"
+
+interface FileUploadFieldProps {
+  file: File | undefined
+  onChange: (file: File | undefined) => void
+  uploadProgress?: number | null
+}
+
+const FileUploadField: React.FC<FileUploadFieldProps> = ({ file, onChange, uploadProgress }) => {
+  const fileInputRef = useRef<HTMLInputElement>(null)
+
+  const handleDrop = (e: React.DragEvent) => {
+    e.preventDefault()
+    const f = e.dataTransfer.files[0]
+    if (f?.type.startsWith("audio/")) onChange(f)
+  }
+
+  return (
+    <div className="vmat-form-field">
+      <label className="vmat-form-label">音频文件 *</label>
+      <div
+        className="vmat-upload-zone"
+        onClick={() => fileInputRef.current?.click()}
+        onDragOver={(e) => e.preventDefault()}
+        onDrop={handleDrop}
+      >
+        <input
+          ref={fileInputRef}
+          type="file"
+          accept="audio/*"
+          style={{ display: "none" }}
+          onChange={(e) => {
+            const f = e.target.files?.[0]
+            if (f) onChange(f)
+          }}
+        />
+        {file ? (
+          <div className="vmat-upload-selected">
+            <SoundOutlined className="vmat-upload-icon" />
+            <span className="vmat-upload-filename">{file.name}</span>
+            <span className="vmat-upload-filesize">{formatFileSize(file.size)}</span>
+            <button
+              type="button"
+              className="vmat-upload-clear"
+              onClick={(e) => {
+                e.stopPropagation()
+                onChange(undefined)
+              }}
+            >
+              <CloseOutlined />
+            </button>
+          </div>
+        ) : (
+          <div className="vmat-upload-placeholder">
+            <UploadOutlined className="vmat-upload-icon" />
+            <p>点击或拖拽音频文件到此处</p>
+            <span>支持 MP3、WAV、AAC、FLAC 等格式</span>
+          </div>
+        )}
+      </div>
+      {uploadProgress !== null && uploadProgress !== undefined && (
+        <div className="vmat-upload-progress">
+          <div className="vmat-upload-progress-bar" style={{ width: `${uploadProgress}%` }} />
+          <span className="vmat-upload-progress-text">{uploadProgress}%</span>
+        </div>
+      )}
+    </div>
+  )
+}
+
+export default FileUploadField
@@ -0,0 +1,32 @@
+import React from "react"
+import type { VoiceGender } from "../../types"
+import { GENDER_OPTIONS } from "../../constants"
+import { genderClass } from "../../utils/format"
+
+interface GenderSelectorProps {
+  value: VoiceGender
+  onChange: (value: VoiceGender) => void
+}
+
+const GenderSelector: React.FC<GenderSelectorProps> = ({ value, onChange }) => {
+  return (
+    <div className="vmat-form-field">
+      <label className="vmat-form-label">性别</label>
+      <div className="vmat-gender-group">
+        {GENDER_OPTIONS.map((opt) => (
+          <button
+            key={opt.value}
+            type="button"
+            className={`vmat-gender-btn${value === opt.value ? " active" : ""} ${genderClass(opt.value)}`}
+            onClick={() => onChange(opt.value)}
+          >
+            {opt.icon}
+            {opt.label}
+          </button>
+        ))}
+      </div>
+    </div>
+  )
+}
+
+export default GenderSelector
@@ -0,0 +1,26 @@
+import React from "react"
+import { CheckOutlined } from "@ant-design/icons"
+
+interface BatchCheckboxProps {
+  isSelected: boolean
+  visible: boolean
+  onToggle: () => void
+}
+
+/** 批量选择 checkbox */
+const BatchCheckbox: React.FC<BatchCheckboxProps> = ({ isSelected, visible, onToggle }) => {
+  if (!visible) return null
+  return (
+    <div
+      className={`vmat-card-checkbox vmat-checkbox${isSelected ? " checked" : ""}`}
+      onClick={(e) => {
+        e.stopPropagation()
+        onToggle()
+      }}
+    >
+      {isSelected && <CheckOutlined />}
+    </div>
+  )
+}
+
+export default BatchCheckbox
@@ -0,0 +1,39 @@
+import React from "react"
+import { EditOutlined, DeleteOutlined } from "@ant-design/icons"
+
+interface CardActionsProps {
+  onEdit: () => void
+  onDelete: () => void
+}
+
+/** 卡片操作按钮：编辑 / 删除 */
+const CardActions: React.FC<CardActionsProps> = ({ onEdit, onDelete }) => {
+  return (
+    <div className="vmat-card-actions">
+      <button
+        type="button"
+        className="vmat-card-action-btn"
+        onClick={(e) => {
+          e.stopPropagation()
+          onEdit()
+        }}
+        title="编辑"
+      >
+        <EditOutlined />
+      </button>
+      <button
+        type="button"
+        className="vmat-card-action-btn vmat-card-action-btn--danger"
+        onClick={(e) => {
+          e.stopPropagation()
+          onDelete()
+        }}
+        title="删除"
+      >
+        <DeleteOutlined />
+      </button>
+    </div>
+  )
+}
+
+export default CardActions
@@ -0,0 +1,30 @@
+import React from "react"
+import { AudioOutlined } from "@ant-design/icons"
+import { type VoiceMaterial } from "../../types"
+import { genderClass, genderIcon, genderLabel } from "../../utils/format"
+
+interface CardHeaderProps {
+  material: VoiceMaterial
+}
+
+/** 卡片头部：头像 + 名称 + 性别标签 */
+const CardHeader: React.FC<CardHeaderProps> = ({ material }) => {
+  return (
+    <div className="vmat-card-header">
+      <div className="vmat-card-avatar">
+        <AudioOutlined />
+      </div>
+      <div className="vmat-card-title-area">
+        <h4 className="vmat-card-name" title={material.name}>
+          {material.name}
+        </h4>
+        <span className={`vmat-card-gender ${genderClass(material.gender)}`}>
+          {genderIcon(material.gender)}
+          {genderLabel(material.gender)}
+        </span>
+      </div>
+    </div>
+  )
+}
+
+export default CardHeader
@@ -0,0 +1,21 @@
+import React from "react"
+import { formatDuration, formatFileSize, formatDate } from "../../utils/format"
+
+interface CardMetaProps {
+  duration: number
+  fileSize: number
+  createdAt: string
+}
+
+/** 元信息：时长 / 文件大小 / 创建日期 */
+const CardMeta: React.FC<CardMetaProps> = ({ duration, fileSize, createdAt }) => {
+  return (
+    <div className="vmat-card-meta">
+      <span>{formatDuration(duration)}</span>
+      <span>{formatFileSize(fileSize)}</span>
+      <span>{formatDate(createdAt)}</span>
+    </div>
+  )
+}
+
+export default CardMeta
@@ -0,0 +1,110 @@
+import React, { useRef } from "react"
+import {
+  PlayCircleOutlined,
+  PauseCircleOutlined,
+  SoundOutlined,
+  MutedOutlined,
+} from "@ant-design/icons"
+import { formatDuration } from "../../utils/format"
+
+interface CardPlayerProps {
+  isPlaying: boolean
+  currentTime: number
+  duration: number
+  volume: number
+  fileUrl?: string
+  onPlay: () => void
+  onPause: () => void
+  onSeek: (time: number) => void
+  onVolumeChange: (e: React.ChangeEvent<HTMLInputElement>) => void
+  onToggleMute: () => void
+}
+
+/** 播放控制区：播放按钮 + 进度条 + 时间 + 音量 */
+const CardPlayer: React.FC<CardPlayerProps> = ({
+  isPlaying,
+  currentTime,
+  duration,
+  volume,
+  fileUrl,
+  onPlay,
+  onPause,
+  onSeek,
+  onVolumeChange,
+  onToggleMute,
+}) => {
+  const progressRef = useRef<HTMLDivElement>(null)
+
+  const handleProgressMouseDown = (e: React.MouseEvent<HTMLDivElement>) => {
+    if (!progressRef.current) return
+    e.preventDefault()
+    const doSeek = (ev: MouseEvent) => {
+      if (!progressRef.current) return
+      const rect = progressRef.current.getBoundingClientRect()
+      const percent = Math.max(0, Math.min(1, (ev.clientX - rect.left) / rect.width))
+      onSeek(percent * duration)
+    }
+    doSeek(e.nativeEvent)
+    const handleMove = (ev: MouseEvent) => doSeek(ev)
+    const handleUp = () => {
+      document.removeEventListener("mousemove", handleMove)
+      document.removeEventListener("mouseup", handleUp)
+    }
+    document.addEventListener("mousemove", handleMove)
+    document.addEventListener("mouseup", handleUp)
+  }
+
+  const progress = duration > 0 ? (currentTime / duration) * 100 : 0
+
+  return (
+    <div className="vmat-card-player">
+      <button
+        type="button"
+        className="vmat-play-btn"
+        onClick={(e) => {
+          e.stopPropagation()
+          isPlaying ? onPause() : onPlay()
+        }}
+        disabled={!fileUrl}
+      >
+        {isPlaying ? <PauseCircleOutlined /> : <PlayCircleOutlined />}
+      </button>
+      <div ref={progressRef} className="vmat-progress" onMouseDown={handleProgressMouseDown}>
+        <div className="vmat-progress-bar" style={{ width: `${progress}%` }} />
+        {isPlaying && <div className="vmat-progress-thumb" style={{ left: `${progress}%` }} />}
+      </div>
+      <span className="vmat-time">
+        {isPlaying ? formatDuration(currentTime) : formatDuration(duration)}
+      </span>
+      {/* 音量控制 */}
+      <div className="vmat-volume">
+        <button
+          type="button"
+          className="vmat-volume-btn"
+          onClick={(e) => {
+            e.stopPropagation()
+            onToggleMute()
+          }}
+          title={volume === 0 ? "取消静音" : "静音"}
+        >
+          {volume === 0 ? <MutedOutlined /> : <SoundOutlined />}
+        </button>
+        <input
+          type="range"
+          className="vmat-volume-slider"
+          min={0}
+          max={1}
+          step={0.05}
+          value={volume}
+          onChange={(e) => {
+            e.stopPropagation()
+            onVolumeChange(e)
+          }}
+          onClick={(e) => e.stopPropagation()}
+        />
+      </div>
+    </div>
+  )
+}
+
+export default CardPlayer
@@ -0,0 +1,52 @@
+import React from "react"
+import { Tooltip } from "antd"
+import { Tag } from "@/components/ui"
+import { type TagItem } from "@/api/tags"
+import { MAX_CARD_TAGS, TAG_VARIANTS } from "../../constants"
+
+interface CardTagsProps {
+  tagIds: string[]
+  tagMap: Map<string, TagItem>
+  onEdit: () => void
+}
+
+/** 标签展示区 */
+const CardTags: React.FC<CardTagsProps> = ({ tagIds, tagMap, onEdit }) => {
+  if (tagIds.length === 0) {
+    return (
+      <div className="vmat-card-tags">
+        <span
+          className="vmat-tag-empty"
+          onClick={(e) => {
+            e.stopPropagation()
+            onEdit()
+          }}
+        >
+          添加标签
+        </span>
+      </div>
+    )
+  }
+
+  return (
+    <div className="vmat-card-tags">
+      {tagIds.slice(0, MAX_CARD_TAGS).map((tagId, i) => (
+        <Tag key={tagId} variant={TAG_VARIANTS[i % TAG_VARIANTS.length]}>
+          {tagMap.get(tagId)?.name ?? tagId}
+        </Tag>
+      ))}
+      {tagIds.length > MAX_CARD_TAGS && (
+        <Tooltip
+          title={tagIds
+            .slice(MAX_CARD_TAGS)
+            .map((id) => tagMap.get(id)?.name ?? id)
+            .join("、")}
+        >
+          <Tag className="vmat-tag-overflow">+{tagIds.length - MAX_CARD_TAGS}</Tag>
+        </Tooltip>
+      )}
+    </div>
+  )
+}
+
+export default CardTags
@@ -0,0 +1,8 @@
+export { default } from "../VoiceMaterialCard"
+export * from "./types"
+export { default as CardHeader } from "./CardHeader"
+export { default as CardTags } from "./CardTags"
+export { default as CardMeta } from "./CardMeta"
+export { default as CardPlayer } from "./CardPlayer"
+export { default as CardActions } from "./CardActions"
+export { default as BatchCheckbox } from "./BatchCheckbox"
@@ -0,0 +1,21 @@
+import React from "react"
+import { type VoiceMaterial } from "../../types"
+import { type TagItem } from "@/api/tags"
+
+export interface VoiceCardProps {
+  material: VoiceMaterial
+  isPlaying: boolean
+  currentTime: number
+  isSelected: boolean
+  batchMode: boolean
+  volume: number
+  tagMap: Map<string, TagItem>
+  onPlay: () => void
+  onPause: () => void
+  onSeek: (time: number) => void
+  onEdit: () => void
+  onDelete: () => void
+  onToggleSelect: (id: string) => void
+  onVolumeChange: (e: React.ChangeEvent<HTMLInputElement>) => void
+  onToggleMute: () => void
+}
@@ -0,0 +1,38 @@
+import { useCallback } from "react"
+import { useMutation, useQueryClient } from "@tanstack/react-query"
+import { deleteAsset } from "@/api/assets"
+import { type VoiceMaterial } from "../../../types"
+
+interface UseVoiceDeleteOptions {
+  materials: VoiceMaterial[]
+}
+
+/**
+ * 配音素材删除 Hook
+ */
+export function useVoiceDelete({ materials }: UseVoiceDeleteOptions) {
+  const queryClient = useQueryClient()
+
+  const deleteMutation = useMutation({
+    mutationFn: (assetId: string) => deleteAsset(assetId),
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["assets", "voice"] })
+    },
+  })
+
+  const handleDelete = useCallback(
+    (id: string, onBeforeDelete?: () => void) => {
+      const material = materials.find((m) => m.id === id)
+      if (!material) return
+      if (onBeforeDelete) onBeforeDelete()
+      deleteMutation.mutate(id)
+    },
+    [materials, deleteMutation],
+  )
+
+  return {
+    isDeleting: deleteMutation.isPending,
+    deleteMutation,
+    handleDelete,
+  }
+}
@@ -0,0 +1,78 @@
+import { useCallback } from "react"
+import { useMutation, useQueryClient } from "@tanstack/react-query"
+import { updateAsset } from "@/api/assets"
+import { tagAsset, untagAsset } from "@/api/tags"
+import { type VoiceGender, type VoiceMaterial, buildMetadata } from "../../../types"
+
+interface UseVoiceEditOptions {
+  materials: VoiceMaterial[]
+}
+
+/**
+ * 配音素材编辑 Hook
+ * 封装编辑流程：更新基础信息 + 同步标签差异
+ */
+export function useVoiceEdit({ materials }: UseVoiceEditOptions) {
+  const queryClient = useQueryClient()
+
+  const editMutation = useMutation({
+    mutationFn: async (data: {
+      id: string
+      name: string
+      gender: VoiceGender
+      description: string
+      tagIds: string[]
+    }) => {
+      // 1. 更新基础信息
+      await updateAsset(data.id, {
+        name: data.name,
+        metadata: buildMetadata({
+          gender: data.gender,
+          description: data.description,
+        }),
+      })
+
+      // 2. 对比标签差异，调用 tag/untag API
+      const currentAsset = materials.find((m) => m.id === data.id)
+      const oldTagIds = currentAsset?.tagIds ?? []
+      const newTagIds = data.tagIds
+
+      const toAdd = newTagIds.filter((id) => !oldTagIds.includes(id))
+      const toRemove = oldTagIds.filter((id) => !newTagIds.includes(id))
+
+      if (toAdd.length > 0) {
+        await tagAsset(data.id, toAdd)
+      }
+      for (const tagId of toRemove) {
+        await untagAsset(data.id, tagId)
+      }
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["assets", "voice"] })
+      queryClient.invalidateQueries({ queryKey: ["tags"] })
+    },
+  })
+
+  const handleEdit = useCallback(
+    (
+      editingMaterial: VoiceMaterial | null,
+      data: Omit<VoiceMaterial, "id" | "createdAt"> & { file?: File },
+    ) => {
+      if (!editingMaterial) return
+      editMutation.mutate({
+        id: editingMaterial.id,
+        name: data.name,
+        gender: data.gender,
+        description: data.description,
+        tagIds: data.tagIds,
+      })
+    },
+    [editMutation],
+  )
+
+  return {
+    isEditing: editMutation.isPending,
+    editMutation,
+    handleEdit,
+  }
+}
@@ -0,0 +1,111 @@
+import { useState, useCallback } from "react"
+import { useMutation, useQueryClient } from "@tanstack/react-query"
+import { message } from "antd"
+import {
+  createAsset,
+  uploadAssetDirect,
+  getAssetLibraries,
+  type AssetLibraryItem,
+} from "@/api/assets"
+import { tagAsset } from "@/api/tags"
+import { type VoiceGender, type VoiceMaterial, buildMetadata } from "../../../types"
+import { getAudioDuration } from "../../../utils/audio"
+
+interface UseVoiceUploadOptions {
+  voiceLibrary?: { id: string; kind: string }
+  createLibMutation: { mutateAsync: () => Promise<AssetLibraryItem>; isPending: boolean }
+}
+
+/**
+ * 配音素材上传 Hook
+ * 封装上传流程：获取库 → 上传文件 → 获取时长 → 创建记录 → 打标签
+ */
+export function useVoiceUpload({ voiceLibrary, createLibMutation }: UseVoiceUploadOptions) {
+  const queryClient = useQueryClient()
+  const [uploadProgress, setUploadProgress] = useState<number | null>(null)
+
+  const uploadMutation = useMutation({
+    mutationFn: async (data: {
+      file: File
+      name: string
+      gender: VoiceGender
+      description: string
+      tagIds: string[]
+    }) => {
+      setUploadProgress(0)
+      try {
+        // 1. 获取或等待 voice library
+        let lib = voiceLibrary
+        if (!lib) {
+          if (createLibMutation.isPending) {
+            await createLibMutation.mutateAsync()
+          }
+          const libs = await queryClient.fetchQuery({
+            queryKey: ["asset-libraries"],
+            queryFn: getAssetLibraries,
+          })
+          lib = libs.find((l: AssetLibraryItem) => l.kind === "voice")
+          if (!lib) throw new Error("无法创建配音库")
+        }
+
+        // 2. 上传文件（带进度）
+        const { storage_key } = await uploadAssetDirect({
+          file: data.file,
+          library_id: lib.id,
+          onProgress: (p) => setUploadProgress(p),
+        })
+
+        // 3. 获取音频时长
+        const duration = await getAudioDuration(data.file)
+
+        // 4. 创建素材记录
+        const asset = await createAsset({
+          library_id: lib.id,
+          name: data.name,
+          storage_key,
+          mime_type: data.file.type || "audio/mpeg",
+          metadata: buildMetadata({
+            gender: data.gender,
+            description: data.description,
+            duration,
+          }),
+        })
+
+        // 5. 打标签（标签走独立 API）
+        if (data.tagIds.length > 0) {
+          await tagAsset(asset.id, data.tagIds)
+        }
+      } finally {
+        setUploadProgress(null)
+      }
+    },
+    onSuccess: () => {
+      queryClient.invalidateQueries({ queryKey: ["assets", "voice"] })
+      queryClient.invalidateQueries({ queryKey: ["tags"] })
+    },
+    onError: (err: Error) => {
+      message.error(err.message || "上传失败，请重试")
+    },
+  })
+
+  const handleUpload = useCallback(
+    (data: Omit<VoiceMaterial, "id" | "createdAt"> & { file?: File }) => {
+      if (!data.file) return
+      uploadMutation.mutate({
+        file: data.file,
+        name: data.name,
+        gender: data.gender,
+        description: data.description,
+        tagIds: data.tagIds,
+      })
+    },
+    [uploadMutation],
+  )
+
+  return {
+    uploadProgress,
+    isUploading: uploadMutation.isPending,
+    uploadMutation,
+    handleUpload,
+  }
+}
@@ -1,17 +1,9 @@
-import { useState, useCallback } from "react"
-import { useMutation, useQueryClient } from "@tanstack/react-query"
-import { message } from "antd"
-import {
-  createAsset,
-  updateAsset,
-  deleteAsset,
-  uploadAssetDirect,
-  getAssetLibraries,
-  type AssetLibraryItem,
-} from "@/api/assets"
-import { tagAsset, untagAsset } from "@/api/tags"
-import { type VoiceGender, type VoiceMaterial, buildMetadata } from "../../types"
-import { getAudioDuration } from "../../utils/audio"
+import { useState } from "react"
+import { type VoiceMaterial } from "../../types"
+import { type AssetLibraryItem } from "@/api/assets"
+import { useVoiceUpload } from "./actions/useVoiceUpload"
+import { useVoiceEdit } from "./actions/useVoiceEdit"
+import { useVoiceDelete } from "./actions/useVoiceDelete"

 interface UseVoiceMaterialActionsOptions {
  voiceLibrary?: { id: string; kind: string }
@@ -21,184 +13,56 @@ interface UseVoiceMaterialActionsOptions {

 /**
 * 配音素材操作 Hook
- * 封装上传、编辑、删除等变更操作及相关 UI 状态
+ * 组合上传、编辑、删除三个子 Hook，统一管理弹窗状态
 */
 export function useVoiceMaterialActions({
  voiceLibrary,
  materials,
  createLibMutation,
 }: UseVoiceMaterialActionsOptions) {
-  const queryClient = useQueryClient()
-
-  // ── 弹窗状态 ──────────────────────────────────────────────
+  // ── 弹窗状态 ──
  const [uploadOpen, setUploadOpen] = useState(false)
  const [editingMaterial, setEditingMaterial] = useState<VoiceMaterial | null>(null)

-  // ── 上传进度 ──────────────────────────────────────────────
-  const [uploadProgress, setUploadProgress] = useState<number | null>(null)
+  // ── 子领域 Hooks ──
+  const { uploadProgress, uploadMutation } = useVoiceUpload({ voiceLibrary, createLibMutation })
+  const { editMutation } = useVoiceEdit({ materials })
+  const { handleDelete } = useVoiceDelete({ materials })

-  // ── 上传 mutation ─────────────────────────────────────────
-  const uploadMutation = useMutation({
-    mutationFn: async (data: {
-      file: File
-      name: string
-      gender: VoiceGender
-      description: string
-      tagIds: string[]
-    }) => {
-      setUploadProgress(0)
-      try {
-        // 1. 获取或等待 voice library
-        let lib = voiceLibrary
-        if (!lib) {
-          if (createLibMutation.isPending) {
-            await createLibMutation.mutateAsync()
-          }
-          const libs = await queryClient.fetchQuery({
-            queryKey: ["asset-libraries"],
-            queryFn: getAssetLibraries,
-          })
-          lib = libs.find((l: AssetLibraryItem) => l.kind === "voice")
-          if (!lib) throw new Error("无法创建配音库")
-        }
+  /* ── 操作 handlers（关联弹窗状态） ── */

-        // 2. 上传文件（带进度）
-        const { storage_key } = await uploadAssetDirect({
-          file: data.file,
-          library_id: lib.id,
-          onProgress: (p) => setUploadProgress(p),
-        })
-
-        // 3. 获取音频时长
-        const duration = await getAudioDuration(data.file)
-
-        // 4. 创建素材记录
-        const asset = await createAsset({
-          library_id: lib.id,
-          name: data.name,
-          storage_key,
-          mime_type: data.file.type || "audio/mpeg",
-          metadata: buildMetadata({
-            gender: data.gender,
-            description: data.description,
-            duration,
-          }),
-        })
-
-        // 5. 打标签（标签走独立 API）
-        if (data.tagIds.length > 0) {
-          await tagAsset(asset.id, data.tagIds)
-        }
-      } finally {
-        setUploadProgress(null)
-      }
-    },
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["assets", "voice"] })
-      queryClient.invalidateQueries({ queryKey: ["tags"] })
-    },
-    onError: (err: Error) => {
-      message.error(err.message || "上传失败，请重试")
-    },
-  })
-
-  // ── 编辑 mutation ─────────────────────────────────────────
-  const editMutation = useMutation({
-    mutationFn: async (data: {
-      id: string
-      name: string
-      gender: VoiceGender
-      description: string
-      tagIds: string[]
-    }) => {
-      // 1. 更新基础信息
-      await updateAsset(data.id, {
-        name: data.name,
-        metadata: buildMetadata({
-          gender: data.gender,
-          description: data.description,
-        }),
-      })
-
-      // 2. 对比标签差异，调用 tag/untag API
-      const currentAsset = materials.find((m) => m.id === data.id)
-      const oldTagIds = currentAsset?.tagIds ?? []
-      const newTagIds = data.tagIds
-
-      const toAdd = newTagIds.filter((id) => !oldTagIds.includes(id))
-      const toRemove = oldTagIds.filter((id) => !newTagIds.includes(id))
-
-      if (toAdd.length > 0) {
-        await tagAsset(data.id, toAdd)
-      }
-      for (const tagId of toRemove) {
-        await untagAsset(data.id, tagId)
-      }
-    },
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["assets", "voice"] })
-      queryClient.invalidateQueries({ queryKey: ["tags"] })
-    },
-  })
-
-  // ── 删除 mutation ─────────────────────────────────────────
-  const deleteMutation = useMutation({
-    mutationFn: (assetId: string) => deleteAsset(assetId),
-    onSuccess: () => {
-      queryClient.invalidateQueries({ queryKey: ["assets", "voice"] })
-    },
-  })
-
-  /* ── 数据操作 handlers ──────────────────────────────────── */
-
-  const handleUpload = useCallback(
-    (data: Omit<VoiceMaterial, "id" | "createdAt"> & { file?: File }) => {
-      if (!data.file) return
-      uploadMutation.mutate(
-        {
-          file: data.file,
-          name: data.name,
-          gender: data.gender,
-          description: data.description,
-          tagIds: data.tagIds,
-        },
-        {
-          onSuccess: () => {
-            setUploadOpen(false)
-          },
-        },
-      )
-    },
-    [uploadMutation],
-  )
-
-  const handleEdit = useCallback(
-    (data: Omit<VoiceMaterial, "id" | "createdAt"> & { file?: File }) => {
-      if (!editingMaterial) return
-      editMutation.mutate({
-        id: editingMaterial.id,
+  const handleUpload = (data: Omit<VoiceMaterial, "id" | "createdAt"> & { file?: File }) => {
+    if (!data.file) return
+    uploadMutation.mutate(
+      {
+        file: data.file,
        name: data.name,
        gender: data.gender,
        description: data.description,
        tagIds: data.tagIds,
-      })
-      setEditingMaterial(null)
-    },
-    [editingMaterial, editMutation],
-  )
+      },
+      {
+        onSuccess: () => {
+          setUploadOpen(false)
+        },
+      },
+    )
+  }

-  const handleDelete = useCallback(
-    (id: string, onBeforeDelete?: () => void) => {
-      const material = materials.find((m) => m.id === id)
-      if (!material) return
-      if (onBeforeDelete) onBeforeDelete()
-      deleteMutation.mutate(id)
-    },
-    [materials, deleteMutation],
-  )
+  const handleEdit = (data: Omit<VoiceMaterial, "id" | "createdAt"> & { file?: File }) => {
+    if (!editingMaterial) return
+    editMutation.mutate({
+      id: editingMaterial.id,
+      name: data.name,
+      gender: data.gender,
+      description: data.description,
+      tagIds: data.tagIds,
+    })
+    setEditingMaterial(null)
+  }

  return {
-    // 上传 & 编辑状态
+    // 上传 & 编辑 loading 状态
    uploadProgress,
    isUploading: uploadMutation.isPending,
    isEditing: editMutation.isPending,
@@ -1,27 +1,12 @@
 import React from "react"
-import { RobotOutlined } from "@ant-design/icons"
-import { Modal, message } from "antd"
-import { type PresetVoiceDisplay } from "@/pages/voices/types"
-import { genderLabel } from "@/pages/voices/utils/format"
-
-export type TtsStatus = "idle" | "synthesizing" | "done" | "error"
-
-export interface TtsModalProps {
-  open: boolean
-  ttsText: string
-  ttsVoiceId: string
-  ttsSpeed: number
-  ttsStatus: TtsStatus
-  ttsAudioUrl: string | null
-  ttsError: string | null
-  presetVoices: PresetVoiceDisplay[]
-  onClose: () => void
-  onTextChange: (text: string) => void
-  onVoiceChange: (voiceId: string) => void
-  onSpeedChange: (speed: number) => void
-  onSynthesize: () => void
-  onSave: () => void
-}
+import { Modal } from "antd"
+import { type TtsModalProps, type TtsStatus } from "./tts-modal/types"
+import TextInputSection from "./tts-modal/TextInputSection"
+import VoiceSelector from "./tts-modal/VoiceSelector"
+import SpeedControl from "./tts-modal/SpeedControl"
+import SynthesizeButton from "./tts-modal/SynthesizeButton"
+import ErrorAlert from "./tts-modal/ErrorAlert"
+import ResultPanel from "./tts-modal/ResultPanel"

 /** AI 配音弹窗 */
 const TtsModal: React.FC<TtsModalProps> = ({
@@ -50,205 +35,13 @@ const TtsModal: React.FC<TtsModalProps> = ({
          padding: "8px 0",
        }}
      >
-        {/* 文本输入 */}
-        <div>
-          <div
-            style={{
-              fontSize: 13,
-              color: "var(--text-secondary)",
-              marginBottom: 6,
-            }}
-          >
-            输入文本
-          </div>
-          <textarea
-            value={ttsText}
-            onChange={(e) => onTextChange(e.target.value)}
-            placeholder="输入要配音的文本内容..."
-            maxLength={2000}
-            rows={4}
-            style={{
-              width: "100%",
-              padding: "10px 12px",
-              border: "1px solid var(--border-color)",
-              borderRadius: 8,
-              fontSize: 13,
-              background: "var(--bg-primary)",
-              color: "var(--text-primary)",
-              outline: "none",
-              resize: "vertical",
-              fontFamily: "inherit",
-              lineHeight: 1.6,
-            }}
-          />
-          <div
-            style={{
-              fontSize: 11,
-              color: "var(--text-tertiary)",
-              textAlign: "right",
-              marginTop: 4,
-            }}
-          >
-            {ttsText.length}/2000
-          </div>
-        </div>
-
-        {/* 音色选择 */}
-        <div>
-          <div
-            style={{
-              fontSize: 13,
-              color: "var(--text-secondary)",
-              marginBottom: 6,
-            }}
-          >
-            选择音色
-          </div>
-          <select
-            value={ttsVoiceId}
-            onChange={(e) => onVoiceChange(e.target.value)}
-            style={{
-              width: "100%",
-              padding: "8px 12px",
-              border: "1px solid var(--border-color)",
-              borderRadius: 8,
-              fontSize: 13,
-              background: "var(--bg-primary)",
-              color: "var(--text-primary)",
-              outline: "none",
-            }}
-          >
-            <option value="">默认音色</option>
-            {presetVoices.map((v) => (
-              <option key={v.id} value={v.id}>
-                {v.name} — {genderLabel(v.gender)}
-              </option>
-            ))}
-          </select>
-        </div>
-
-        {/* 语速 */}
-        <div>
-          <div
-            style={{
-              fontSize: 13,
-              color: "var(--text-secondary)",
-              marginBottom: 6,
-            }}
-          >
-            语速：{ttsSpeed.toFixed(1)}x
-          </div>
-          <input
-            type="range"
-            min={0.5}
-            max={2.0}
-            step={0.1}
-            value={ttsSpeed}
-            onChange={(e) => onSpeedChange(parseFloat(e.target.value))}
-            style={{ width: "100%", accentColor: "var(--primary-color)" }}
-          />
-          <div
-            style={{
-              display: "flex",
-              justifyContent: "space-between",
-              fontSize: 11,
-              color: "var(--text-tertiary)",
-            }}
-          >
-            <span>0.5x</span>
-            <span>1.0x</span>
-            <span>2.0x</span>
-          </div>
-        </div>
-
-        {/* 合成按钮 */}
-        <button
-          type="button"
-          onClick={() => {
-            if (!ttsText.trim()) {
-              message.warning("请输入要合成的文本")
-              return
-            }
-            onSynthesize()
-          }}
-          disabled={ttsStatus === "synthesizing" || !ttsText.trim()}
-          style={{
-            width: "100%",
-            padding: "10px 0",
-            borderRadius: 8,
-            border: "none",
-            background:
-              ttsStatus === "synthesizing" || !ttsText.trim()
-                ? "var(--text-tertiary)"
-                : "var(--primary-color)",
-            color: "#fff",
-            fontSize: 14,
-            fontWeight: 600,
-            cursor: ttsStatus === "synthesizing" || !ttsText.trim() ? "not-allowed" : "pointer",
-            display: "flex",
-            alignItems: "center",
-            justifyContent: "center",
-            gap: 8,
-          }}
-        >
-          <RobotOutlined />
-          {ttsStatus === "synthesizing" ? "合成中..." : "开始合成"}
-        </button>
-
-        {/* 错误提示 */}
-        {ttsError && (
-          <div
-            style={{
-              padding: "10px 12px",
-              background: "var(--error-soft, #fff2f0)",
-              borderRadius: 8,
-              color: "var(--error-color, #ff4d4f)",
-              fontSize: 13,
-            }}
-          >
-            {ttsError}
-          </div>
-        )}
-
-        {/* 合成结果 */}
+        <TextInputSection value={ttsText} onChange={onTextChange} />
+        <VoiceSelector value={ttsVoiceId} onChange={onVoiceChange} presetVoices={presetVoices} />
+        <SpeedControl speed={ttsSpeed} onChange={onSpeedChange} />
+        <SynthesizeButton status={ttsStatus} text={ttsText} onClick={onSynthesize} />
+        {ttsError && <ErrorAlert error={ttsError} />}
        {ttsStatus === "done" && ttsAudioUrl && (
-          <div
-            style={{
-              padding: 12,
-              background: "var(--bg-secondary)",
-              borderRadius: 8,
-              display: "flex",
-              flexDirection: "column",
-              gap: 10,
-            }}
-          >
-            <div
-              style={{
-                fontSize: 13,
-                fontWeight: 500,
-                color: "var(--success-color, #52c41a)",
-              }}
-            >
-              ✅ 合成完成
-            </div>
-            <audio controls src={ttsAudioUrl} style={{ width: "100%" }} />
-            <button
-              type="button"
-              onClick={onSave}
-              style={{
-                padding: "8px 0",
-                borderRadius: 8,
-                border: "1px solid var(--primary-color)",
-                background: "var(--primary-soft)",
-                color: "var(--primary-color)",
-                fontSize: 13,
-                fontWeight: 600,
-                cursor: "pointer",
-              }}
-            >
-              保存到配音库
-            </button>
-          </div>
+          <ResultPanel audioUrl={ttsAudioUrl} onSave={onSave} />
        )}
      </div>
    </Modal>
@@ -256,3 +49,5 @@ const TtsModal: React.FC<TtsModalProps> = ({
 }

 export default TtsModal
+
+export type { TtsModalProps, TtsStatus }
@@ -1,24 +1,13 @@
 import React from "react"
-import { UploadOutlined, SoundOutlined } from "@ant-design/icons"
-import { Modal, Upload, message } from "antd"
-import { type VoiceGender } from "@/pages/voices/types"
-import { formatFileSize } from "@/pages/voices/utils/format"
-
-export interface UploadVoiceModalProps {
-  open: boolean
-  uploadFile: File | null
-  uploadName: string
-  uploadGender: VoiceGender
-  uploadDesc: string
-  uploadProgress: number | null
-  onClose: () => void
-  onFileSelect: (file: File) => void
-  onFileRemove: () => void
-  onNameChange: (name: string) => void
-  onGenderChange: (gender: VoiceGender) => void
-  onDescChange: (desc: string) => void
-  onUpload: () => void
-}
+import { Modal } from "antd"
+import {
+  FileUploadZone,
+  FileInfoCard,
+  UploadProgress,
+  FormFields,
+  ActionButtons,
+} from "./upload-voice-modal"
+import type { UploadVoiceModalProps } from "./upload-voice-modal"

 /** 上传音频弹窗 */
 const UploadVoiceModal: React.FC<UploadVoiceModalProps> = ({
@@ -36,17 +25,20 @@ const UploadVoiceModal: React.FC<UploadVoiceModalProps> = ({
  onDescChange,
  onUpload,
 }) => {
+  const uploading = uploadProgress !== null
+  const canUpload = !!uploadFile && !!uploadName.trim()
+
  return (
    <Modal
      title="上传音频"
      open={open}
      onCancel={() => {
-        if (uploadProgress !== null) return // 上传中不可关闭
+        if (uploading) return // 上传中不可关闭
        onClose()
      }}
      footer={null}
      width={520}
-      maskClosable={uploadProgress === null}
+      maskClosable={!uploading}
    >
      <div
        style={{
@@ -57,270 +49,36 @@ const UploadVoiceModal: React.FC<UploadVoiceModalProps> = ({
        }}
      >
        {/* 拖拽上传区 */}
-        <Upload.Dragger
-          accept="audio/*"
-          maxCount={1}
-          beforeUpload={(file) => {
-            onFileSelect(file)
-            return false
-          }}
-          onRemove={() => {
-            onFileRemove()
-          }}
-          showUploadList={false}
-          disabled={uploadProgress !== null}
-        >
-          <p
-            style={{
-              fontSize: 32,
-              color: "var(--primary-color)",
-              marginBottom: 8,
-            }}
-          >
-            <UploadOutlined />
-          </p>
-          <p style={{ fontSize: 14, fontWeight: 500, margin: "0 0 4px" }}>
-            点击或拖拽音频文件到此处
-          </p>
-          <p
-            style={{
-              fontSize: 12,
-              color: "var(--text-secondary)",
-              margin: 0,
-            }}
-          >
-            支持 MP3、WAV、AAC、FLAC 等格式，最大 200MB
-          </p>
-        </Upload.Dragger>
+        <FileUploadZone
+          disabled={uploading}
+          onFileSelect={onFileSelect}
+          onFileRemove={onFileRemove}
+        />

        {/* 已选文件信息 */}
-        {uploadFile && (
-          <div
-            style={{
-              padding: "10px 12px",
-              background: "var(--bg-secondary)",
-              borderRadius: 8,
-              display: "flex",
-              alignItems: "center",
-              gap: 10,
-            }}
-          >
-            <SoundOutlined style={{ fontSize: 18, color: "var(--primary-color)" }} />
-            <div style={{ flex: 1, minWidth: 0 }}>
-              <div
-                style={{
-                  fontSize: 13,
-                  fontWeight: 500,
-                  overflow: "hidden",
-                  textOverflow: "ellipsis",
-                  whiteSpace: "nowrap",
-                }}
-              >
-                {uploadFile.name}
-              </div>
-              <div style={{ fontSize: 11, color: "var(--text-secondary)" }}>
-                {formatFileSize(uploadFile.size)}
-              </div>
-            </div>
-          </div>
-        )}
+        {uploadFile && <FileInfoCard file={uploadFile} />}

        {/* 上传进度 */}
-        {uploadProgress !== null && (
-          <div style={{ textAlign: "center", padding: "8px 0" }}>
-            <div
-              style={{
-                fontSize: 22,
-                fontWeight: 700,
-                color: "var(--primary-color)",
-              }}
-            >
-              {uploadProgress}%
-            </div>
-            <div style={{ fontSize: 12, color: "var(--text-secondary)" }}>
-              {uploadProgress < 100 ? "上传中..." : "处理中..."}
-            </div>
-            <div
-              style={{
-                height: 4,
-                background: "var(--bg-tertiary)",
-                borderRadius: 2,
-                marginTop: 8,
-                overflow: "hidden",
-              }}
-            >
-              <div
-                style={{
-                  height: "100%",
-                  width: `${uploadProgress}%`,
-                  background: "var(--primary-color)",
-                  borderRadius: 2,
-                  transition: "width 0.3s ease",
-                }}
-              />
-            </div>
-          </div>
-        )}
+        {uploadProgress !== null && <UploadProgress progress={uploadProgress} />}

-        {/* 名称 */}
-        <div>
-          <div
-            style={{
-              fontSize: 13,
-              color: "var(--text-secondary)",
-              marginBottom: 6,
-            }}
-          >
-            素材名称
-          </div>
-          <input
-            value={uploadName}
-            onChange={(e) => onNameChange(e.target.value)}
-            placeholder="输入素材名称"
-            maxLength={100}
-            disabled={uploadProgress !== null}
-            style={{
-              width: "100%",
-              padding: "8px 12px",
-              border: "1px solid var(--border-color)",
-              borderRadius: 8,
-              fontSize: 13,
-              background: "var(--bg-primary)",
-              color: "var(--text-primary)",
-              outline: "none",
-            }}
-          />
-        </div>
-
-        {/* 性别选择 */}
-        <div>
-          <div
-            style={{
-              fontSize: 13,
-              color: "var(--text-secondary)",
-              marginBottom: 6,
-            }}
-          >
-            音色性别
-          </div>
-          <div style={{ display: "flex", gap: 8 }}>
-            {(["female", "male", "child"] as VoiceGender[]).map((g) => (
-              <button
-                key={g}
-                type="button"
-                onClick={() => onGenderChange(g)}
-                disabled={uploadProgress !== null}
-                style={{
-                  flex: 1,
-                  padding: "6px 0",
-                  borderRadius: 8,
-                  border: `1px solid ${uploadGender === g ? "var(--primary-color)" : "var(--border-color)"}`,
-                  background: uploadGender === g ? "var(--primary-soft)" : "transparent",
-                  color: uploadGender === g ? "var(--primary-color)" : "var(--text-secondary)",
-                  fontSize: 13,
-                  fontWeight: uploadGender === g ? 600 : 400,
-                  cursor: uploadProgress !== null ? "not-allowed" : "pointer",
-                  transition: "all 0.2s",
-                }}
-              >
-                {g === "female" ? "女声" : g === "male" ? "男声" : "童声"}
-              </button>
-            ))}
-          </div>
-        </div>
-
-        {/* 描述 */}
-        <div>
-          <div
-            style={{
-              fontSize: 13,
-              color: "var(--text-secondary)",
-              marginBottom: 6,
-            }}
-          >
-            音色描述（可选）
-          </div>
-          <textarea
-            value={uploadDesc}
-            onChange={(e) => onDescChange(e.target.value)}
-            placeholder="描述这个音色的特点..."
-            maxLength={500}
-            rows={2}
-            disabled={uploadProgress !== null}
-            style={{
-              width: "100%",
-              padding: "8px 12px",
-              border: "1px solid var(--border-color)",
-              borderRadius: 8,
-              fontSize: 13,
-              background: "var(--bg-primary)",
-              color: "var(--text-primary)",
-              outline: "none",
-              resize: "vertical",
-              fontFamily: "inherit",
-            }}
-          />
-        </div>
+        {/* 表单字段 */}
+        <FormFields
+          name={uploadName}
+          gender={uploadGender}
+          desc={uploadDesc}
+          disabled={uploading}
+          onNameChange={onNameChange}
+          onGenderChange={onGenderChange}
+          onDescChange={onDescChange}
+        />

        {/* 操作按钮 */}
-        <div
-          style={{
-            display: "flex",
-            justifyContent: "flex-end",
-            gap: 10,
-            paddingTop: 4,
-          }}
-        >
-          <button
-            type="button"
-            onClick={onClose}
-            disabled={uploadProgress !== null}
-            style={{
-              padding: "8px 20px",
-              borderRadius: 8,
-              border: "1px solid var(--border-color)",
-              background: "transparent",
-              fontSize: 13,
-              cursor: uploadProgress !== null ? "not-allowed" : "pointer",
-              color: "var(--text-secondary)",
-            }}
-          >
-            取消
-          </button>
-          <button
-            type="button"
-            onClick={() => {
-              if (!uploadFile) {
-                message.warning("请先选择音频文件")
-                return
-              }
-              if (!uploadName.trim()) {
-                message.warning("请输入素材名称")
-                return
-              }
-              onUpload()
-            }}
-            disabled={!uploadFile || !uploadName.trim() || uploadProgress !== null}
-            style={{
-              padding: "8px 20px",
-              borderRadius: 8,
-              border: "none",
-              background:
-                !uploadFile || !uploadName.trim() || uploadProgress !== null
-                  ? "var(--text-tertiary)"
-                  : "var(--primary-color)",
-              color: "#fff",
-              fontSize: 13,
-              fontWeight: 600,
-              cursor:
-                !uploadFile || !uploadName.trim() || uploadProgress !== null
-                  ? "not-allowed"
-                  : "pointer",
-            }}
-          >
-            {uploadProgress !== null ? "上传中..." : "开始上传"}
-          </button>
-        </div>
+        <ActionButtons
+          uploading={uploading}
+          canUpload={canUpload}
+          onCancel={onClose}
+          onUpload={onUpload}
+        />
      </div>
    </Modal>
  )
@@ -0,0 +1,24 @@
+import React from "react"
+
+interface ErrorAlertProps {
+  error: string
+}
+
+/** 错误提示 */
+const ErrorAlert: React.FC<ErrorAlertProps> = ({ error }) => {
+  return (
+    <div
+      style={{
+        padding: "10px 12px",
+        background: "var(--error-soft, #fff2f0)",
+        borderRadius: 8,
+        color: "var(--error-color, #ff4d4f)",
+        fontSize: 13,
+      }}
+    >
+      {error}
+    </div>
+  )
+}
+
+export default ErrorAlert
@@ -0,0 +1,51 @@
+import React from "react"
+
+interface ResultPanelProps {
+  audioUrl: string
+  onSave: () => void
+}
+
+/** 合成结果展示 */
+const ResultPanel: React.FC<ResultPanelProps> = ({ audioUrl, onSave }) => {
+  return (
+    <div
+      style={{
+        padding: 12,
+        background: "var(--bg-secondary)",
+        borderRadius: 8,
+        display: "flex",
+        flexDirection: "column",
+        gap: 10,
+      }}
+    >
+      <div
+        style={{
+          fontSize: 13,
+          fontWeight: 500,
+          color: "var(--success-color, #52c41a)",
+        }}
+      >
+        ✅ 合成完成
+      </div>
+      <audio controls src={audioUrl} style={{ width: "100%" }} />
+      <button
+        type="button"
+        onClick={onSave}
+        style={{
+          padding: "8px 0",
+          borderRadius: 8,
+          border: "1px solid var(--primary-color)",
+          background: "var(--primary-soft)",
+          color: "var(--primary-color)",
+          fontSize: 13,
+          fontWeight: 600,
+          cursor: "pointer",
+        }}
+      >
+        保存到配音库
+      </button>
+    </div>
+  )
+}
+
+export default ResultPanel
@@ -0,0 +1,47 @@
+import React from "react"
+import { TTS_CONFIG } from "./types"
+
+interface SpeedControlProps {
+  speed: number
+  onChange: (speed: number) => void
+}
+
+/** 语速调节滑块 */
+const SpeedControl: React.FC<SpeedControlProps> = ({ speed, onChange }) => {
+  return (
+    <div>
+      <div
+        style={{
+          fontSize: 13,
+          color: "var(--text-secondary)",
+          marginBottom: 6,
+        }}
+      >
+        语速：{speed.toFixed(1)}x
+      </div>
+      <input
+        type="range"
+        min={TTS_CONFIG.MIN_SPEED}
+        max={TTS_CONFIG.MAX_SPEED}
+        step={TTS_CONFIG.SPEED_STEP}
+        value={speed}
+        onChange={(e) => onChange(parseFloat(e.target.value))}
+        style={{ width: "100%", accentColor: "var(--primary-color)" }}
+      />
+      <div
+        style={{
+          display: "flex",
+          justifyContent: "space-between",
+          fontSize: 11,
+          color: "var(--text-tertiary)",
+        }}
+      >
+        <span>{TTS_CONFIG.MIN_SPEED}x</span>
+        <span>{TTS_CONFIG.DEFAULT_SPEED}x</span>
+        <span>{TTS_CONFIG.MAX_SPEED}x</span>
+      </div>
+    </div>
+  )
+}
+
+export default SpeedControl
@@ -0,0 +1,51 @@
+import React from "react"
+import { RobotOutlined } from "@ant-design/icons"
+import { message } from "antd"
+import { type TtsStatus } from "./types"
+
+interface SynthesizeButtonProps {
+  status: TtsStatus
+  text: string
+  onClick: () => void
+}
+
+/** 合成按钮 */
+const SynthesizeButton: React.FC<SynthesizeButtonProps> = ({ status, text, onClick }) => {
+  const disabled = status === "synthesizing" || !text.trim()
+
+  const handleClick = () => {
+    if (!text.trim()) {
+      message.warning("请输入要合成的文本")
+      return
+    }
+    onClick()
+  }
+
+  return (
+    <button
+      type="button"
+      onClick={handleClick}
+      disabled={disabled}
+      style={{
+        width: "100%",
+        padding: "10px 0",
+        borderRadius: 8,
+        border: "none",
+        background: disabled ? "var(--text-tertiary)" : "var(--primary-color)",
+        color: "#fff",
+        fontSize: 14,
+        fontWeight: 600,
+        cursor: disabled ? "not-allowed" : "pointer",
+        display: "flex",
+        alignItems: "center",
+        justifyContent: "center",
+        gap: 8,
+      }}
+    >
+      <RobotOutlined />
+      {status === "synthesizing" ? "合成中..." : "开始合成"}
+    </button>
+  )
+}
+
+export default SynthesizeButton
@@ -0,0 +1,56 @@
+import React from "react"
+import { TTS_CONFIG } from "./types"
+
+interface TextInputSectionProps {
+  value: string
+  onChange: (text: string) => void
+}
+
+/** 文本输入区 */
+const TextInputSection: React.FC<TextInputSectionProps> = ({ value, onChange }) => {
+  return (
+    <div>
+      <div
+        style={{
+          fontSize: 13,
+          color: "var(--text-secondary)",
+          marginBottom: 6,
+        }}
+      >
+        输入文本
+      </div>
+      <textarea
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        placeholder="输入要配音的文本内容..."
+        maxLength={TTS_CONFIG.MAX_TEXT_LENGTH}
+        rows={4}
+        style={{
+          width: "100%",
+          padding: "10px 12px",
+          border: "1px solid var(--border-color)",
+          borderRadius: 8,
+          fontSize: 13,
+          background: "var(--bg-primary)",
+          color: "var(--text-primary)",
+          outline: "none",
+          resize: "vertical",
+          fontFamily: "inherit",
+          lineHeight: 1.6,
+        }}
+      />
+      <div
+        style={{
+          fontSize: 11,
+          color: "var(--text-tertiary)",
+          textAlign: "right",
+          marginTop: 4,
+        }}
+      >
+        {value.length}/{TTS_CONFIG.MAX_TEXT_LENGTH}
+      </div>
+    </div>
+  )
+}
+
+export default TextInputSection
@@ -0,0 +1,49 @@
+import React from "react"
+import { type PresetVoiceDisplay } from "@/pages/voices/types"
+import { genderLabel } from "@/pages/voices/utils/format"
+
+interface VoiceSelectorProps {
+  value: string
+  onChange: (voiceId: string) => void
+  presetVoices: PresetVoiceDisplay[]
+}
+
+/** 音色选择下拉 */
+const VoiceSelector: React.FC<VoiceSelectorProps> = ({ value, onChange, presetVoices }) => {
+  return (
+    <div>
+      <div
+        style={{
+          fontSize: 13,
+          color: "var(--text-secondary)",
+          marginBottom: 6,
+        }}
+      >
+        选择音色
+      </div>
+      <select
+        value={value}
+        onChange={(e) => onChange(e.target.value)}
+        style={{
+          width: "100%",
+          padding: "8px 12px",
+          border: "1px solid var(--border-color)",
+          borderRadius: 8,
+          fontSize: 13,
+          background: "var(--bg-primary)",
+          color: "var(--text-primary)",
+          outline: "none",
+        }}
+      >
+        <option value="">默认音色</option>
+        {presetVoices.map((v) => (
+          <option key={v.id} value={v.id}>
+            {v.name} — {genderLabel(v.gender)}
+          </option>
+        ))}
+      </select>
+    </div>
+  )
+}
+
+export default VoiceSelector
@@ -0,0 +1,8 @@
+export { default } from "../TtsModal"
+export * from "./types"
+export { default as TextInputSection } from "./TextInputSection"
+export { default as VoiceSelector } from "./VoiceSelector"
+export { default as SpeedControl } from "./SpeedControl"
+export { default as SynthesizeButton } from "./SynthesizeButton"
+export { default as ErrorAlert } from "./ErrorAlert"
+export { default as ResultPanel } from "./ResultPanel"
@@ -0,0 +1,29 @@
+import { type PresetVoiceDisplay } from "@/pages/voices/types"
+
+export type TtsStatus = "idle" | "synthesizing" | "done" | "error"
+
+export interface TtsModalProps {
+  open: boolean
+  ttsText: string
+  ttsVoiceId: string
+  ttsSpeed: number
+  ttsStatus: TtsStatus
+  ttsAudioUrl: string | null
+  ttsError: string | null
+  presetVoices: PresetVoiceDisplay[]
+  onClose: () => void
+  onTextChange: (text: string) => void
+  onVoiceChange: (voiceId: string) => void
+  onSpeedChange: (speed: number) => void
+  onSynthesize: () => void
+  onSave: () => void
+}
+
+/** TTS 常量配置 */
+export const TTS_CONFIG = {
+  MAX_TEXT_LENGTH: 2000,
+  DEFAULT_SPEED: 1.0,
+  MIN_SPEED: 0.5,
+  MAX_SPEED: 2.0,
+  SPEED_STEP: 0.1,
+} as const
@@ -0,0 +1,68 @@
+import React from "react"
+
+interface ActionButtonsProps {
+  uploading: boolean
+  canUpload: boolean
+  onCancel: () => void
+  onUpload: () => void
+}
+
+const ActionButtons: React.FC<ActionButtonsProps> = ({
+  uploading,
+  canUpload,
+  onCancel,
+  onUpload,
+}) => {
+  const disabled = uploading || !canUpload
+
+  const handleUpload = () => {
+    onUpload()
+  }
+
+  return (
+    <div
+      style={{
+        display: "flex",
+        justifyContent: "flex-end",
+        gap: 10,
+        paddingTop: 4,
+      }}
+    >
+      <button
+        type="button"
+        onClick={onCancel}
+        disabled={uploading}
+        style={{
+          padding: "8px 20px",
+          borderRadius: 8,
+          border: "1px solid var(--border-color)",
+          background: "transparent",
+          fontSize: 13,
+          cursor: uploading ? "not-allowed" : "pointer",
+          color: "var(--text-secondary)",
+        }}
+      >
+        取消
+      </button>
+      <button
+        type="button"
+        onClick={handleUpload}
+        disabled={disabled}
+        style={{
+          padding: "8px 20px",
+          borderRadius: 8,
+          border: "none",
+          background: disabled ? "var(--text-tertiary)" : "var(--primary-color)",
+          color: "#fff",
+          fontSize: 13,
+          fontWeight: 600,
+          cursor: disabled ? "not-allowed" : "pointer",
+        }}
+      >
+        {uploading ? "上传中..." : "开始上传"}
+      </button>
+    </div>
+  )
+}
+
+export default ActionButtons
@@ -0,0 +1,42 @@
+import React from "react"
+import { SoundOutlined } from "@ant-design/icons"
+import { formatFileSize } from "@/pages/voices/utils/format"
+
+interface FileInfoCardProps {
+  file: File
+}
+
+const FileInfoCard: React.FC<FileInfoCardProps> = ({ file }) => {
+  return (
+    <div
+      style={{
+        padding: "10px 12px",
+        background: "var(--bg-secondary)",
+        borderRadius: 8,
+        display: "flex",
+        alignItems: "center",
+        gap: 10,
+      }}
+    >
+      <SoundOutlined style={{ fontSize: 18, color: "var(--primary-color)" }} />
+      <div style={{ flex: 1, minWidth: 0 }}>
+        <div
+          style={{
+            fontSize: 13,
+            fontWeight: 500,
+            overflow: "hidden",
+            textOverflow: "ellipsis",
+            whiteSpace: "nowrap",
+          }}
+        >
+          {file.name}
+        </div>
+        <div style={{ fontSize: 11, color: "var(--text-secondary)" }}>
+          {formatFileSize(file.size)}
+        </div>
+      </div>
+    </div>
+  )
+}
+
+export default FileInfoCard
@@ -0,0 +1,54 @@
+import React from "react"
+import { UploadOutlined } from "@ant-design/icons"
+import { Upload } from "antd"
+import { UPLOAD_CONFIG } from "./types"
+
+interface FileUploadZoneProps {
+  disabled: boolean
+  onFileSelect: (file: File) => void
+  onFileRemove: () => void
+}
+
+const FileUploadZone: React.FC<FileUploadZoneProps> = ({
+  disabled,
+  onFileSelect,
+  onFileRemove,
+}) => {
+  return (
+    <Upload.Dragger
+      accept={UPLOAD_CONFIG.accept}
+      maxCount={1}
+      beforeUpload={(file) => {
+        onFileSelect(file)
+        return false
+      }}
+      onRemove={() => {
+        onFileRemove()
+      }}
+      showUploadList={false}
+      disabled={disabled}
+    >
+      <p
+        style={{
+          fontSize: 32,
+          color: "var(--primary-color)",
+          marginBottom: 8,
+        }}
+      >
+        <UploadOutlined />
+      </p>
+      <p style={{ fontSize: 14, fontWeight: 500, margin: "0 0 4px" }}>点击或拖拽音频文件到此处</p>
+      <p
+        style={{
+          fontSize: 12,
+          color: "var(--text-secondary)",
+          margin: 0,
+        }}
+      >
+        支持 MP3、WAV、AAC、FLAC 等格式，最大 {UPLOAD_CONFIG.maxSizeMB}MB
+      </p>
+    </Upload.Dragger>
+  )
+}
+
+export default FileUploadZone
@@ -0,0 +1,106 @@
+import React from "react"
+import type { VoiceGender } from "@/pages/voices/types"
+import { GENDER_OPTIONS, UPLOAD_CONFIG } from "./types"
+
+interface FormFieldsProps {
+  name: string
+  gender: VoiceGender
+  desc: string
+  disabled: boolean
+  onNameChange: (name: string) => void
+  onGenderChange: (gender: VoiceGender) => void
+  onDescChange: (desc: string) => void
+}
+
+const labelStyle: React.CSSProperties = {
+  fontSize: 13,
+  color: "var(--text-secondary)",
+  marginBottom: 6,
+}
+
+const inputStyle: React.CSSProperties = {
+  width: "100%",
+  padding: "8px 12px",
+  border: "1px solid var(--border-color)",
+  borderRadius: 8,
+  fontSize: 13,
+  background: "var(--bg-primary)",
+  color: "var(--text-primary)",
+  outline: "none",
+}
+
+const FormFields: React.FC<FormFieldsProps> = ({
+  name,
+  gender,
+  desc,
+  disabled,
+  onNameChange,
+  onGenderChange,
+  onDescChange,
+}) => {
+  return (
+    <>
+      {/* 名称 */}
+      <div>
+        <div style={labelStyle}>素材名称</div>
+        <input
+          value={name}
+          onChange={(e) => onNameChange(e.target.value)}
+          placeholder="输入素材名称"
+          maxLength={UPLOAD_CONFIG.maxNameLength}
+          disabled={disabled}
+          style={inputStyle}
+        />
+      </div>
+
+      {/* 性别选择 */}
+      <div>
+        <div style={labelStyle}>音色性别</div>
+        <div style={{ display: "flex", gap: 8 }}>
+          {GENDER_OPTIONS.map((opt) => (
+            <button
+              key={opt.value}
+              type="button"
+              onClick={() => onGenderChange(opt.value)}
+              disabled={disabled}
+              style={{
+                flex: 1,
+                padding: "6px 0",
+                borderRadius: 8,
+                border: `1px solid ${gender === opt.value ? "var(--primary-color)" : "var(--border-color)"}`,
+                background: gender === opt.value ? "var(--primary-soft)" : "transparent",
+                color: gender === opt.value ? "var(--primary-color)" : "var(--text-secondary)",
+                fontSize: 13,
+                fontWeight: gender === opt.value ? 600 : 400,
+                cursor: disabled ? "not-allowed" : "pointer",
+                transition: "all 0.2s",
+              }}
+            >
+              {opt.label}
+            </button>
+          ))}
+        </div>
+      </div>
+
+      {/* 描述 */}
+      <div>
+        <div style={labelStyle}>音色描述（可选）</div>
+        <textarea
+          value={desc}
+          onChange={(e) => onDescChange(e.target.value)}
+          placeholder="描述这个音色的特点..."
+          maxLength={UPLOAD_CONFIG.maxDescLength}
+          rows={2}
+          disabled={disabled}
+          style={{
+            ...inputStyle,
+            resize: "vertical",
+            fontFamily: "inherit",
+          }}
+        />
+      </div>
+    </>
+  )
+}
+
+export default FormFields
@@ -0,0 +1,45 @@
+import React from "react"
+
+interface UploadProgressProps {
+  progress: number
+}
+
+const UploadProgress: React.FC<UploadProgressProps> = ({ progress }) => {
+  return (
+    <div style={{ textAlign: "center", padding: "8px 0" }}>
+      <div
+        style={{
+          fontSize: 22,
+          fontWeight: 700,
+          color: "var(--primary-color)",
+        }}
+      >
+        {progress}%
+      </div>
+      <div style={{ fontSize: 12, color: "var(--text-secondary)" }}>
+        {progress < 100 ? "上传中..." : "处理中..."}
+      </div>
+      <div
+        style={{
+          height: 4,
+          background: "var(--bg-tertiary)",
+          borderRadius: 2,
+          marginTop: 8,
+          overflow: "hidden",
+        }}
+      >
+        <div
+          style={{
+            height: "100%",
+            width: `${progress}%`,
+            background: "var(--primary-color)",
+            borderRadius: 2,
+            transition: "width 0.3s ease",
+          }}
+        />
+      </div>
+    </div>
+  )
+}
+
+export default UploadProgress
@@ -0,0 +1,6 @@
+export { default as FileUploadZone } from "./FileUploadZone"
+export { default as FileInfoCard } from "./FileInfoCard"
+export { default as UploadProgress } from "./UploadProgress"
+export { default as FormFields } from "./FormFields"
+export { default as ActionButtons } from "./ActionButtons"
+export * from "./types"
@@ -0,0 +1,30 @@
+import type { VoiceGender } from "@/pages/voices/types"
+
+export interface UploadVoiceModalProps {
+  open: boolean
+  uploadFile: File | null
+  uploadName: string
+  uploadGender: VoiceGender
+  uploadDesc: string
+  uploadProgress: number | null
+  onClose: () => void
+  onFileSelect: (file: File) => void
+  onFileRemove: () => void
+  onNameChange: (name: string) => void
+  onGenderChange: (gender: VoiceGender) => void
+  onDescChange: (desc: string) => void
+  onUpload: () => void
+}
+
+export const GENDER_OPTIONS: { value: VoiceGender; label: string }[] = [
+  { value: "female", label: "女声" },
+  { value: "male", label: "男声" },
+  { value: "child", label: "童声" },
+]
+
+export const UPLOAD_CONFIG = {
+  maxSizeMB: 200,
+  maxNameLength: 100,
+  maxDescLength: 500,
+  accept: "audio/*",
+} as const
@@ -1,3 +1,4 @@
+// 重构：DuplicationUpload 页面已拆分为子组件（UploadZone/InfoSidebar/UploadProgress等）
 import { describe, expect, it, vi, beforeEach } from "vitest"
 import {
  uploadForDuplication,
@@ -1,4 +1,5 @@
 import React from "react"
+// 重构：useCloneModal Hook 已拆分为 useCloneFormState + useCloneSubmit 子 Hook
 import { describe, expect, it, vi } from "vitest"
 import { render } from "@testing-library/react"
 import CloneModal from "@/components/voice/CloneModal"
@@ -122,6 +122,11 @@ import "@/pages/templates/hooks/useTemplateLibrary"
 import "@/pages/templates/hooks/useTemplateDetail"
 import "@/pages/templates/components/template-library/TemplateCard"
 import "@/pages/templates/components/template-library/TemplateDetailModal"
+import "@/pages/templates/components/template-library/template-detail-modal/PreviewArea"
+import "@/pages/templates/components/template-library/template-detail-modal/SegmentList"
+import "@/pages/templates/components/template-library/template-detail-modal/StyleConfig"
+import "@/pages/templates/components/template-library/template-detail-modal/DetailFooter"
+import "@/pages/templates/components/template-library/template-detail-modal/types"
 import "@/pages/templates/components/template-library/TemplateHeader"
 import "@/pages/templates/components/template-library/TemplateToolbar"
 import "@/pages/templates/components/template-library/TemplateGrid"
@@ -2,6 +2,9 @@
 * GeneratePage 模块 smoke test
 * 建立完整依赖链，确保 vitest related 模式能匹配到
 * generate 目录下所有文件的改动（包括 Phase 3 子组件）
+ *
+ * 重构记录：
+ * - useStep2Materials 拆分为 useMaterialLibrary + useSmartMatch 子 Hook
 */
 import { describe, it, expect } from "vitest"

@@ -12,6 +12,13 @@ import "@/pages/voice-materials/VoiceMaterialLibrary"
 import "@/pages/voice-materials/components/TagSelector"
 import "@/pages/voice-materials/components/MaterialForm"
 import "@/pages/voice-materials/components/VoiceMaterialCard"
+import "@/pages/voice-materials/components/voice-material-card/CardHeader"
+import "@/pages/voice-materials/components/voice-material-card/CardTags"
+import "@/pages/voice-materials/components/voice-material-card/CardMeta"
+import "@/pages/voice-materials/components/voice-material-card/CardPlayer"
+import "@/pages/voice-materials/components/voice-material-card/CardActions"
+import "@/pages/voice-materials/components/voice-material-card/BatchCheckbox"
+import "@/pages/voice-materials/components/voice-material-card/types"
 import "@/pages/voice-materials/components/VoiceMaterialRow"
 import "@/pages/voice-materials/components/Toolbar"
 import "@/pages/voice-materials/components/TagFilterBar"
@@ -33,6 +40,9 @@ describe("VoiceMaterialLibrary module smoke test", () => {
 // Hooks
 import "@/pages/voice-materials/hooks/useVoiceMaterials"
 import "@/pages/voice-materials/hooks/useVoiceMaterials/useVoiceMaterialActions"
+import "@/pages/voice-materials/hooks/useVoiceMaterials/actions/useVoiceUpload"
+import "@/pages/voice-materials/hooks/useVoiceMaterials/actions/useVoiceEdit"
+import "@/pages/voice-materials/hooks/useVoiceMaterials/actions/useVoiceDelete"
 import "@/pages/voice-materials/hooks/useTtsSynthesize"
 import "@/pages/voice-materials/hooks/useAudioPlayer"
 import "@/pages/voice-materials/hooks/useBatchOperations"
@@ -14,7 +14,20 @@ import "@/pages/voices/components/CloneVoiceCard"
 import "@/pages/voices/components/CloneDetailModal"
 import "@/pages/voices/components/CloneCardSkeleton"
 import "@/pages/voices/components/UploadVoiceModal"
+import "@/pages/voices/components/upload-voice-modal/FileUploadZone"
+import "@/pages/voices/components/upload-voice-modal/FileInfoCard"
+import "@/pages/voices/components/upload-voice-modal/UploadProgress"
+import "@/pages/voices/components/upload-voice-modal/FormFields"
+import "@/pages/voices/components/upload-voice-modal/ActionButtons"
+import "@/pages/voices/components/upload-voice-modal/types"
 import "@/pages/voices/components/TtsModal"
+import "@/pages/voices/components/tts-modal/TextInputSection"
+import "@/pages/voices/components/tts-modal/VoiceSelector"
+import "@/pages/voices/components/tts-modal/SpeedControl"
+import "@/pages/voices/components/tts-modal/SynthesizeButton"
+import "@/pages/voices/components/tts-modal/ErrorAlert"
+import "@/pages/voices/components/tts-modal/ResultPanel"
+import "@/pages/voices/components/tts-modal/types"
 import "@/pages/voices/components/VoiceFilterBar"
 import "@/pages/voices/components/MaterialVoiceCard"

@@ -0,0 +1,351 @@
+"""BGM 混音纯逻辑模块.
+
+所有函数均为纯函数，不调用 FFmpeg、不操作文件。
+便于单元测试，也方便被其他模块复用。
+"""
+
+from __future__ import annotations
+
+from dataclasses import dataclass
+from typing import Optional
+
+
+@dataclass
+class BGMPureConfig:
+    """BGM 混音配置（纯数据类）."""
+
+    volume: float = 0.3
+    fade_in: float = 0.0
+    fade_out: float = 0.0
+    loop_enabled: bool = True
+    sidechain_enabled: bool = False
+    sidechain_ratio: float = 0.3
+    sidechain_attack: float = 0.02
+    sidechain_release: float = 0.5
+    sidechain_threshold: float = -25.0
+
+
+# ── 循环判断与计算 ─────────────────────────────────────────────────────────────
+
+
+def should_loop_bgm(
+    bgm_duration: float,
+    target_duration: float,
+    loop_enabled: bool = True,
+) -> bool:
+    """判断是否需要循环 BGM.
+
+    当 BGM 时长小于目标时长的 90% 时才循环，
+    避免 BGM 只差一点点就铺满还要循环一次的情况。
+
+    Args:
+        bgm_duration: BGM 原始时长（秒）
+        target_duration: 目标时长（秒）
+        loop_enabled: 是否允许循环
+
+    Returns:
+        是否需要循环
+    """
+    if not loop_enabled:
+        return False
+    if bgm_duration <= 0:
+        return False
+    if target_duration <= 0:
+        return False
+    return bgm_duration < target_duration * 0.9
+
+
+def calculate_loop_count(bgm_duration: float, target_duration: float) -> int:
+    """计算需要循环的次数.
+
+    多算 2 次作为余量，避免末尾因为精度问题不够长。
+
+    Args:
+        bgm_duration: BGM 原始时长（秒）
+        target_duration: 目标时长（秒）
+
+    Returns:
+        循环次数，至少 1
+    """
+    if bgm_duration <= 0:
+        return 1
+    if target_duration <= 0:
+        return 1
+    if bgm_duration >= target_duration:
+        return 1
+    return max(1, int(target_duration / bgm_duration) + 2)
+
+
+# ── BGM 预处理滤镜链构建 ──────────────────────────────────────────────────────
+
+
+def build_bgm_filter_chain(
+    bgm_duration: float,
+    target_duration: float,
+    volume: float = 0.3,
+    fade_in: float = 0.0,
+    fade_out: float = 0.0,
+    loop_enabled: bool = True,
+) -> str:
+    """构建 BGM 预处理滤镜链.
+
+    处理顺序：循环 → 音量 → 淡入 → 淡出 → 截断 → 重置时间戳
+
+    Args:
+        bgm_duration: BGM 原始时长（秒）
+        target_duration: 目标时长（秒）
+        volume: 音量 0.0~1.0
+        fade_in: 淡入时长（秒）
+        fade_out: 淡出时长（秒）
+        loop_enabled: 是否允许循环
+
+    Returns:
+        FFmpeg filter_complex 字符串（逗号分隔）
+    """
+    # 兜底：目标时长不能为 0 或负数
+    safe_target = max(5.0, target_duration) if target_duration <= 0 else target_duration
+
+    filter_parts: list[str] = []
+
+    # 1. 循环
+    needs_loop = should_loop_bgm(bgm_duration, safe_target, loop_enabled)
+    if needs_loop:
+        loop_count = calculate_loop_count(bgm_duration, safe_target)
+        filter_parts.append(f"aloop=loop={loop_count}:size=0")
+
+    # 2. 音量调节（钳制到 0~1）
+    safe_volume = max(0.0, min(1.0, volume))
+    if abs(safe_volume - 1.0) > 0.001:
+        filter_parts.append(f"volume={safe_volume:.3f}")
+
+    # 3. 淡入
+    if fade_in > 0:
+        filter_parts.append(f"afade=t=in:st=0:d={fade_in:.3f}")
+
+    # 4. 淡出（从 target_duration - fade_out 开始）
+    if fade_out > 0 and safe_target > fade_out:
+        fade_start = safe_target - fade_out
+        filter_parts.append(f"afade=t=out:st={fade_start:.3f}:d={fade_out:.3f}")
+
+    # 5. 截断到目标时长
+    filter_parts.append(f"atrim=0:{safe_target:.3f}")
+
+    # 6. 重置时间戳
+    filter_parts.append("asetpts=N/SR/TB")
+
+    return ",".join(filter_parts)
+
+
+# ── 混音滤镜构建 ──────────────────────────────────────────────────────────────
+
+
+def calculate_sidechain_ratio(sidechain_ratio: float) -> float:
+    """计算 sidechain 压缩比.
+
+    sidechain_ratio 表示闪避时 BGM 音量降低比例（0~1），
+    映射到 FFmpeg sidechaincompress 的 ratio 参数（2:1 ~ 10:1）。
+
+    ratio = 1 / (1 - sidechain_ratio)
+
+    Args:
+        sidechain_ratio: 闪避比例 0.0~1.0
+
+    Returns:
+        FFmpeg ratio 值（2.0 ~ 10.0）
+    """
+    if sidechain_ratio <= 0:
+        return 2.0
+    if sidechain_ratio >= 1.0:
+        return 10.0
+    raw_ratio = 1.0 / (1.0 - sidechain_ratio)
+    return max(2.0, min(10.0, raw_ratio))
+
+
+def build_simple_mix_filter() -> str:
+    """构建普通 amix 混音滤镜.
+
+    两路输入：[0:a] 主音频，[1:a] BGM
+    主音频权重 1.0，BGM 已在预处理阶段调好音量。
+    amix 会自动归一化，用 volume=2 补偿衰减。
+
+    Returns:
+        filter_complex 字符串
+    """
+    return "[0:a][1:a]amix=inputs=2:duration=first:dropout_transition=0[outa];" "[outa]volume=2[final]"
+
+
+def build_sidechain_mix_filter(
+    threshold: float = -25.0,
+    ratio: float = 0.3,
+    attack: float = 0.02,
+    release: float = 0.5,
+) -> str:
+    """构建 sidechain 人声闪避混音滤镜.
+
+    流程：
+    1. BGM[1:a] 经过 sidechaincompress，用主音频[0:a]做触发
+    2. 主音频 + 压缩后的 BGM amix 混音
+    3. volume=1.5 轻微补偿
+
+    Args:
+        threshold: 触发阈值（dB）
+        ratio: 闪避比例 0.0~1.0（会被转换为 FFmpeg ratio）
+        attack: 攻击时间（秒）
+        release: 释放时间（秒）
+
+    Returns:
+        filter_complex 字符串
+    """
+    ffmpeg_ratio = calculate_sidechain_ratio(ratio)
+
+    return (
+        f"[1:a][0:a]sidechaincompress="
+        f"threshold={threshold}dB:"
+        f"ratio={ffmpeg_ratio:.1f}:"
+        f"attack={attack:.3f}:"
+        f"release={release:.3f}:"
+        f"knee=6[bgm_comp];"
+        f"[0:a][bgm_comp]amix=inputs=2:duration=first:dropout_transition=0[outa];"
+        f"[outa]volume=1.5[final]"
+    )
+
+
+# ── 配置验证与规范化 ──────────────────────────────────────────────────────────
+
+
+def normalize_bgm_config(config: dict) -> dict:
+    """规范化 BGM 配置字典.
+
+    将各种类型的输入值转换为正确的类型，
+    并进行边界钳制。
+
+    Args:
+        config: 原始配置字典
+
+    Returns:
+        规范化后的配置字典
+    """
+    result: dict = {}
+
+    # volume: 0.0 ~ 1.0
+    result["volume"] = max(0.0, min(1.0, float(config.get("volume", 0.3))))
+
+    # fade_in: >= 0
+    result["fade_in"] = max(0.0, float(config.get("fade_in", 0.0)))
+
+    # fade_out: >= 0
+    result["fade_out"] = max(0.0, float(config.get("fade_out", 0.0)))
+
+    # loop_enabled: bool
+    result["loop_enabled"] = bool(config.get("loop_enabled", True))
+
+    # sidechain_enabled: bool
+    result["sidechain_enabled"] = bool(config.get("sidechain_enabled", False))
+
+    # sidechain_ratio: 0.0 ~ 1.0
+    result["sidechain_ratio"] = max(0.0, min(1.0, float(config.get("sidechain_ratio", 0.3))))
+
+    # sidechain_attack: > 0
+    result["sidechain_attack"] = max(0.001, float(config.get("sidechain_attack", 0.02)))
+
+    # sidechain_release: > 0
+    result["sidechain_release"] = max(0.01, float(config.get("sidechain_release", 0.5)))
+
+    # sidechain_threshold: dB
+    result["sidechain_threshold"] = float(config.get("sidechain_threshold", -25.0))
+
+    return result
+
+
+def validate_bgm_config(config: dict) -> tuple[bool, list[str]]:
+    """验证 BGM 配置是否合法.
+
+    Args:
+        config: 配置字典
+
+    Returns:
+        (是否合法, 错误信息列表)
+    """
+    errors: list[str] = []
+
+    volume = config.get("volume", 0.3)
+    if not isinstance(volume, (int, float)):
+        errors.append("volume 必须是数字")
+    elif volume < 0 or volume > 1:
+        errors.append("volume 必须在 0~1 之间")
+
+    fade_in = config.get("fade_in", 0)
+    if not isinstance(fade_in, (int, float)):
+        errors.append("fade_in 必须是数字")
+    elif fade_in < 0:
+        errors.append("fade_in 不能为负数")
+
+    fade_out = config.get("fade_out", 0)
+    if not isinstance(fade_out, (int, float)):
+        errors.append("fade_out 必须是数字")
+    elif fade_out < 0:
+        errors.append("fade_out 不能为负数")
+
+    sidechain_ratio = config.get("sidechain_ratio", 0.3)
+    if not isinstance(sidechain_ratio, (int, float)):
+        errors.append("sidechain_ratio 必须是数字")
+    elif sidechain_ratio < 0 or sidechain_ratio > 1:
+        errors.append("sidechain_ratio 必须在 0~1 之间")
+
+    return (len(errors) == 0, errors)
+
+
+# ── 时长相关工具 ──────────────────────────────────────────────────────────────
+
+
+def calculate_fade_out_start(
+    target_duration: float,
+    fade_out: float,
+) -> Optional[float]:
+    """计算淡出开始时间.
+
+    如果淡出时长大于等于目标时长，返回 None（不做淡出）。
+
+    Args:
+        target_duration: 目标时长（秒）
+        fade_out: 淡出时长（秒）
+
+    Returns:
+        淡出开始时间（秒），如果不需要淡出返回 None
+    """
+    if fade_out <= 0:
+        return None
+    if target_duration <= 0:
+        return None
+    if fade_out >= target_duration:
+        return None
+    return target_duration - fade_out
+
+
+def estimate_bgm_processing_duration(
+    bgm_duration: float,
+    target_duration: float,
+    loop_enabled: bool = True,
+) -> float:
+    """估算 BGM 预处理后的实际输出时长.
+
+    正常情况下应该等于 target_duration，
+    但在某些边界情况下可能不同。
+
+    Args:
+        bgm_duration: BGM 原始时长
+        target_duration: 目标时长
+        loop_enabled: 是否允许循环
+
+    Returns:
+        预估输出时长（秒）
+    """
+    if target_duration <= 0:
+        return 5.0  # 兜底时长
+
+    # 不需要循环的情况：如果 BGM 够长，截断到 target_duration
+    if not loop_enabled and bgm_duration >= target_duration:
+        return target_duration
+
+    # 需要循环或 BGM 太短：截断到 target_duration
+    return target_duration
@@ -0,0 +1,493 @@
+"""视频拼接引擎纯逻辑模块.
+
+所有函数均为纯函数，不调用 FFmpeg、不操作文件。
+便于单元测试，也方便被其他模块复用。
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+from typing import Any, Optional
+
+# ── 帧率解析 ──────────────────────────────────────────────────────────────────
+
+
+def parse_fps(fps_value: Any) -> float:
+    """解析帧率字符串/数值.
+
+    支持格式：
+    - 数字: 30 → 30.0
+    - 分数: "30/1" → 30.0, "24000/1001" → 23.976...
+    - 字符串数字: "30" → 30.0
+
+    Args:
+        fps_value: 帧率值（字符串、数字等）
+
+    Returns:
+        帧率（fps），失败返回 30.0
+    """
+    if fps_value is None:
+        return 30.0
+
+    try:
+        fps_str = str(fps_value).strip()
+        if not fps_str:
+            return 30.0
+
+        if "/" in fps_str:
+            num_str, den_str = fps_str.split("/", 1)
+            num = float(num_str)
+            den = float(den_str)
+            if den == 0:
+                return 30.0
+            return num / den
+
+        return float(fps_str)
+    except (ValueError, TypeError, ZeroDivisionError):
+        return 30.0
+
+
+def format_fps_filter(fps: float) -> str:
+    """格式化 fps 滤镜参数.
+
+    Args:
+        fps: 帧率
+
+    Returns:
+        fps 滤镜字符串
+    """
+    # 接近整数时用整数形式
+    if abs(fps - round(fps)) < 0.001:
+        return f"fps={int(fps)}"
+    return f"fps={fps:.3f}"
+
+
+# ── 输出参数计算 ──────────────────────────────────────────────────────────────
+
+
+def resolve_output_params(
+    config_width: int,
+    config_height: int,
+    config_fps: float,
+    first_video_info: Optional[dict] = None,
+    default_width: int = 1080,
+    default_height: int = 1920,
+    default_fps: float = 30.0,
+) -> tuple[int, int, float]:
+    """计算输出视频参数.
+
+    优先级：
+    1. config 中显式指定的（非 0 值）
+    2. 第一段视频的探测参数
+    3. 默认值
+
+    Args:
+        config_width: 配置的宽度（0 表示未指定）
+        config_height: 配置的高度（0 表示未指定）
+        config_fps: 配置的帧率（0 表示未指定）
+        first_video_info: 第一段视频的探测信息字典
+        default_width: 默认宽度
+        default_height: 默认高度
+        default_fps: 默认帧率
+
+    Returns:
+        (宽度, 高度, 帧率)
+    """
+    width = config_width
+    height = config_height
+    fps = config_fps
+
+    info = first_video_info or {}
+
+    # 宽度：用配置 → 探测 → 默认
+    if width == 0:
+        width = int(info.get("width", default_width))
+
+    # 高度
+    if height == 0:
+        height = int(info.get("height", default_height))
+
+    # 帧率
+    if fps == 0:
+        fps_str = info.get("r_frame_rate", f"{int(default_fps)}/1")
+        fps = parse_fps(fps_str)
+
+    # 确保都是有效值
+    width = max(1, width)
+    height = max(1, height)
+    fps = max(1.0, fps)
+
+    return width, height, fps
+
+
+def calculate_scaled_size(
+    src_w: int,
+    src_h: int,
+    target_w: int,
+    target_h: int,
+) -> tuple[int, int, int, int]:
+    """计算等比缩放后的尺寸和填充偏移.
+
+    保持宽高比，不足的部分用黑边填充。
+
+    Args:
+        src_w: 原始宽度
+        src_h: 原始高度
+        target_w: 目标宽度
+        target_h: 目标高度
+
+    Returns:
+        (缩放后宽度, 缩放后高度, X偏移, Y偏移)
+    """
+    if src_w <= 0 or src_h <= 0:
+        return (target_w, target_h, 0, 0)
+
+    src_ratio = src_w / src_h
+    target_ratio = target_w / target_h
+
+    if abs(src_ratio - target_ratio) < 0.001:
+        # 比例相同，直接缩放
+        return (target_w, target_h, 0, 0)
+    elif src_ratio > target_ratio:
+        # 源更宽，以宽度为准，上下填充
+        scaled_w = target_w
+        scaled_h = int(target_w / src_ratio)
+        offset_x = 0
+        offset_y = (target_h - scaled_h) // 2
+        return (scaled_w, scaled_h, offset_x, offset_y)
+    else:
+        # 源更高，以高度为准，左右填充
+        scaled_h = target_h
+        scaled_w = int(target_h * src_ratio)
+        offset_x = (target_w - scaled_w) // 2
+        offset_y = 0
+        return (scaled_w, scaled_h, offset_x, offset_y)
+
+
+# ── stream copy 判断 ─────────────────────────────────────────────────────────
+
+
+def can_use_stream_copy(
+    segments: list[dict],
+    target_width: int,
+    target_height: int,
+    target_fps: float,
+    force_reencode: bool = False,
+) -> bool:
+    """判断是否可以使用 stream copy（无损拼接）.
+
+    stream copy 条件：
+    1. force_reencode 为 False
+    2. 所有视频段的编码格式、分辨率、帧率均相同
+    3. 目标参数与源参数一致（不需要转码）
+
+    Args:
+        segments: 视频段列表，每个元素包含 codec_name/width/height/fps
+        target_width: 目标宽度
+        target_height: 目标高度
+        target_fps: 目标帧率
+        force_reencode: 是否强制重编码
+
+    Returns:
+        是否可以用 stream copy
+    """
+    if force_reencode:
+        return False
+
+    if not segments:
+        return False
+
+    # 用第一段作为基准
+    first = segments[0]
+    base_codec = first.get("codec_name", "")
+    base_width = int(first.get("width", 0))
+    base_height = int(first.get("height", 0))
+    base_fps = parse_fps(first.get("r_frame_rate", "30/1"))
+
+    # 目标参数必须与基准一致
+    if target_width != base_width or target_height != base_height:
+        return False
+
+    if abs(target_fps - base_fps) > 0.01:
+        return False
+
+    # 所有段必须参数一致
+    for seg in segments[1:]:
+        if seg.get("codec_name", "") != base_codec:
+            return False
+        if int(seg.get("width", 0)) != base_width:
+            return False
+        if int(seg.get("height", 0)) != base_height:
+            return False
+        seg_fps = parse_fps(seg.get("r_frame_rate", "30/1"))
+        if abs(seg_fps - base_fps) > 0.01:
+            return False
+
+    return True
+
+
+# ── 文件列表生成（demuxer 模式） ───────────────────────────────────────────────
+
+
+def generate_concat_file_list(
+    video_paths: list[str],
+) -> str:
+    """生成 concat demuxer 模式的文件列表内容.
+
+    格式：
+        file '/path/to/video1.mp4'
+        file '/path/to/video2.mp4'
+
+    Args:
+        video_paths: 视频文件路径列表
+
+    Returns:
+        文件列表文本内容
+    """
+    lines = []
+    for path in video_paths:
+        # 转义单引号
+        escaped = path.replace("'", "'\\''")
+        lines.append(f"file '{escaped}'")
+    return "\n".join(lines) + "\n"
+
+
+# ── 滤镜链构建 ────────────────────────────────────────────────────────────────
+
+
+def build_scale_pad_filter(
+    target_w: int,
+    target_h: int,
+    src_w: int = 0,
+    src_h: int = 0,
+) -> str:
+    """构建 scale + pad 滤镜（等比缩放+黑边填充）.
+
+    Args:
+        target_w: 目标宽度
+        target_h: 目标高度
+        src_w: 源宽度（0 表示未知，用 iw/ih）
+        src_h: 源高度（0 表示未知）
+
+    Returns:
+        滤镜字符串
+    """
+    # 使用 FFmpeg 表达式，动态计算
+    return (
+        f"scale={target_w}:{target_h}:force_original_aspect_ratio=decrease,"
+        f"pad={target_w}:{target_h}:(ow-iw)/2:(oh-ih)/2:black"
+    )
+
+
+def build_fps_filter(fps: float) -> str:
+    """构建 fps 滤镜.
+
+    Args:
+        fps: 目标帧率
+
+    Returns:
+        fps 滤镜字符串
+    """
+    return format_fps_filter(fps)
+
+
+def build_setpts_filter() -> str:
+    """构建 setpts 滤镜（重置时间戳）.
+
+    Returns:
+        setpts 滤镜字符串
+    """
+    return "setpts=PTS-STARTPTS"
+
+
+def build_concat_filter(
+    num_inputs: int,
+    has_audio: bool = True,
+) -> str:
+    """构建 concat 滤镜.
+
+    Args:
+        num_inputs: 输入数量
+        has_audio: 是否包含音频轨
+
+    Returns:
+        concat 滤镜字符串（包含输入标签）
+    """
+    if num_inputs <= 0:
+        return ""
+
+    n = num_inputs
+    v = 1  # 视频轨数
+    a = 1 if has_audio else 0  # 音频轨数
+
+    # 构建输入标签
+    input_labels = "".join(f"[{i}:v][{i}:a]" if has_audio else f"[{i}:v]" for i in range(n))
+
+    output_label = "[concat_v]" + ("[concat_a]" if has_audio else "")
+
+    return f"{input_labels}concat=n={n}:v={v}:a={a}{output_label}"
+
+
+def build_single_segment_filter_chain(
+    target_width: int,
+    target_height: int,
+    target_fps: float,
+    segment_index: int,
+    has_audio: bool = True,
+) -> str:
+    """构建单段视频的预处理滤镜链.
+
+    每段视频需要：缩放填充 → 帧率统一 → 重置时间戳
+
+    Args:
+        target_width: 目标宽度
+        target_height: 目标高度
+        target_fps: 目标帧率
+        segment_index: 段索引（用于生成标签）
+        has_audio: 是否包含音频
+
+    Returns:
+        滤镜字符串
+    """
+    scale_pad = build_scale_pad_filter(target_width, target_height)
+    fps = build_fps_filter(target_fps)
+    setpts = build_setpts_filter()
+
+    input_v = f"[{segment_index}:v]"
+    output_v = f"[v{segment_index}]"
+
+    video_chain = f"{input_v}{scale_pad},{fps},{setpts}{output_v}"
+
+    if has_audio:
+        input_a = f"[{segment_index}:a]"
+        output_a = f"[a{segment_index}]"
+        # 音频也需要重置时间戳
+        audio_chain = f"{input_a}asetpts=PTS-STARTPTS{output_a}"
+        return f"{video_chain};{audio_chain}"
+
+    return video_chain
+
+
+# ── 配置验证 ──────────────────────────────────────────────────────────────────
+
+
+def validate_concat_config(config: dict) -> tuple[bool, list[str]]:
+    """验证拼接配置.
+
+    Args:
+        config: 配置字典
+
+    Returns:
+        (是否合法, 错误信息列表)
+    """
+    errors: list[str] = []
+
+    segments = config.get("segments", [])
+    if not segments:
+        errors.append("至少需要一个视频段")
+        return (False, errors)
+
+    if len(segments) < 1:
+        errors.append("视频段数量不能少于 1")
+
+    # 检查每个段
+    for i, seg in enumerate(segments):
+        video_path = seg.get("video_path", "")
+        if not video_path:
+            errors.append(f"第 {i+1} 段缺少 video_path")
+
+    # 输出参数
+    output_width = config.get("output_width", 0)
+    output_height = config.get("output_height", 0)
+    if output_width < 0:
+        errors.append("output_width 不能为负数")
+    if output_height < 0:
+        errors.append("output_height 不能为负数")
+
+    output_fps = config.get("output_fps", 0)
+    if output_fps < 0:
+        errors.append("output_fps 不能为负数")
+
+    return (len(errors) == 0, errors)
+
+
+# ── 路径验证 ──────────────────────────────────────────────────────────────────
+
+
+def validate_video_path(video_path: str, work_dir: str | Path) -> tuple[bool, str]:
+    """验证视频路径是否安全.
+
+    检查：
+    1. 路径不为空
+    2. 路径不包含 .. 回溯
+    3. 路径在 work_dir 内（安全边界）
+
+    Args:
+        video_path: 视频文件路径
+        work_dir: 工作目录
+
+    Returns:
+        (是否合法, 错误信息)
+    """
+    if not video_path:
+        return (False, "视频路径不能为空")
+
+    path_str = str(video_path)
+    work_str = str(work_dir)
+
+    # 检查路径遍历
+    if ".." in Path(path_str).parts:
+        return (False, "视频路径不能包含 .. 回溯")
+
+    # 绝对路径才做边界检查；相对路径默认相对于 work_dir
+    if not Path(path_str).is_absolute():
+        return (True, "")
+
+    # 绝对路径检查是否在工作目录内
+    try:
+        video_abs = Path(path_str).resolve()
+        work_abs = Path(work_str).resolve()
+        if work_abs.is_absolute() and not str(video_abs).startswith(str(work_abs)):
+            return (False, "视频路径必须在工作目录内")
+    except (OSError, ValueError):
+        pass  # 解析失败时跳过边界检查
+
+    return (True, "")
+
+
+# ── 工具函数 ──────────────────────────────────────────────────────────────────
+
+
+def estimate_total_duration(segments: list[dict]) -> float:
+    """估算总时长.
+
+    Args:
+        segments: 视频段列表，每个元素包含 duration 字段
+
+    Returns:
+        总时长（秒）
+    """
+    total = 0.0
+    for seg in segments:
+        dur = seg.get("duration", 0)
+        try:
+            total += float(dur)
+        except (ValueError, TypeError):
+            pass
+    return total
+
+
+def count_valid_segments(segments: list[dict]) -> int:
+    """统计有效视频段数量（有 video_path 的）.
+
+    Args:
+        segments: 视频段列表
+
+    Returns:
+        有效段数量
+    """
+    count = 0
+    for seg in segments:
+        if seg.get("video_path"):
+            count += 1
+    return count
@@ -0,0 +1,466 @@
+"""多轨混音纯逻辑模块.
+
+所有函数均为纯函数，不调用 FFmpeg、不操作文件。
+便于单元测试，也方便被其他模块复用。
+"""
+
+from __future__ import annotations
+
+from typing import Any, Optional
+
+# ── 单轨时间计算 ──────────────────────────────────────────────────────────────
+
+
+def calculate_effective_range(
+    track_start: float,
+    track_duration: float,
+    audio_duration: float,
+    target_duration: float,
+) -> tuple[float, float, float]:
+    """计算轨道的有效时间范围.
+
+    处理：
+    - 轨道时长为 0 或负时用音频完整时长
+    - 轨道开始在目标时长外时跳过
+    - 轨道开始为负时截断开头
+
+    Args:
+        track_start: 轨道开始时间（秒），可为负
+        track_duration: 轨道持续时长（秒），<=0 表示用音频全长
+        audio_duration: 音频文件实际时长（秒）
+        target_duration: 目标总时长（秒）
+
+    Returns:
+        (effective_start, need_duration, trim_start)
+        - effective_start: 在目标时间轴上的开始位置（>=0）
+        - need_duration: 需要截取的音频长度
+        - trim_start: 从源音频的哪个位置开始截取
+    """
+    if audio_duration <= 0:
+        return (0.0, 0.0, 0.0)
+
+    # 有效时长（轨道声明的时长，未被截断的）
+    if track_duration > 0:
+        effective_dur = min(track_duration, audio_duration)
+    else:
+        effective_dur = audio_duration
+
+    effective_start = track_start
+    trim_start = 0.0
+
+    # 负的开始时间：从源音频中间开始取，轨道前段被截掉
+    if effective_start < 0:
+        trim_start = -effective_start
+        # 可用时长 = 总时长 - 被截掉的前段
+        effective_dur = max(0.0, effective_dur - trim_start)
+        effective_start = 0.0
+
+    # 轨道完全在目标时长之外
+    if effective_start >= target_duration:
+        return (0.0, 0.0, 0.0)
+
+    # 轨道完全在 0 之前
+    if effective_start + effective_dur <= 0:
+        return (0.0, 0.0, 0.0)
+
+    # 实际需要的源时长
+    need_dur = min(effective_dur, target_duration - effective_start)
+    if need_dur <= 0:
+        return (0.0, 0.0, 0.0)
+
+    # 调整 trim_start 不能超过音频长度
+    if trim_start >= audio_duration:
+        return (0.0, 0.0, 0.0)
+
+    return (effective_start, need_dur, trim_start)
+
+
+def is_track_visible(
+    track_start: float,
+    track_duration: float,
+    audio_duration: float,
+    target_duration: float,
+) -> bool:
+    """判断轨道是否在目标时长范围内可见（有声音）.
+
+    Args:
+        track_start: 轨道开始时间
+        track_duration: 轨道持续时长
+        audio_duration: 音频时长
+        target_duration: 目标总时长
+
+    Returns:
+        是否可见
+    """
+    _, need_dur, _ = calculate_effective_range(track_start, track_duration, audio_duration, target_duration)
+    return need_dur > 0
+
+
+# ── 单轨滤镜链构建 ────────────────────────────────────────────────────────────
+
+
+def build_track_filter_chain(
+    volume: float,
+    fade_in: float,
+    fade_out: float,
+    effective_start: float,
+    need_duration: float,
+    trim_start: float,
+    target_duration: float,
+) -> str:
+    """构建单轨道预处理滤镜链.
+
+    处理顺序：截断 → 重置时间戳 → 音量 → 淡入 → 淡出 → 延迟 → 最终截断 → 重置时间戳
+
+    Args:
+        volume: 音量 0.0~1.0
+        fade_in: 淡入时长（秒）
+        fade_out: 淡出时长（秒）
+        effective_start: 在目标轴上的开始时间
+        need_duration: 需要截取的时长
+        trim_start: 从源音频的哪个位置开始
+        target_duration: 目标总时长
+
+    Returns:
+        逗号分隔的滤镜字符串
+    """
+    filter_parts: list[str] = []
+
+    # 1. 截断到有效范围
+    filter_parts.append(f"atrim={trim_start:.3f}:{trim_start + need_duration:.3f}")
+    filter_parts.append("asetpts=N/SR/TB")
+
+    # 2. 音量调节
+    safe_volume = max(0.0, min(2.0, volume))
+    if abs(safe_volume - 1.0) > 0.001:
+        filter_parts.append(f"volume={safe_volume:.3f}")
+
+    # 3. 淡入（必须小于总时长才有效）
+    if fade_in > 0 and fade_in < need_duration:
+        filter_parts.append(f"afade=t=in:st=0:d={fade_in:.3f}")
+
+    # 4. 淡出
+    if fade_out > 0 and fade_out < need_duration:
+        fade_start = need_duration - fade_out
+        if fade_start > 0:
+            filter_parts.append(f"afade=t=out:st={fade_start:.3f}:d={fade_out:.3f}")
+
+    # 5. 时间偏移（开头静音填充）
+    if effective_start > 0.01:
+        delay_ms = int(effective_start * 1000)
+        filter_parts.append(f"adelay={delay_ms}|{delay_ms}")
+
+    # 6. 最终截断到目标总时长
+    filter_parts.append(f"atrim=0:{target_duration:.3f}")
+    filter_parts.append("asetpts=N/SR/TB")
+
+    return ",".join(filter_parts)
+
+
+# ── amix 混音滤镜构建 ────────────────────────────────────────────────────────
+
+
+def build_amix_filter(num_inputs: int, duration_mode: str = "longest") -> str:
+    """构建 amix 混音滤镜.
+
+    Args:
+        num_inputs: 输入轨道数量
+        duration_mode: 时长模式：longest / shortest / first
+
+    Returns:
+        amix 滤镜字符串
+    """
+    if num_inputs <= 0:
+        return ""
+
+    # 校验 duration_mode
+    if duration_mode not in ("longest", "shortest", "first"):
+        duration_mode = "longest"
+
+    return f"amix=inputs={num_inputs}:duration={duration_mode}:dropout_transition=0"
+
+
+def calculate_amix_volume_compensation(num_inputs: int) -> float:
+    """计算 amix 后的音量补偿系数.
+
+    amix 会将 N 路输入每路乘以 1/N 来归一化，
+    所以需要乘以 N 来补偿（简单粗暴但有效）。
+
+    Args:
+        num_inputs: 输入轨道数量
+
+    Returns:
+        补偿系数
+    """
+    if num_inputs <= 1:
+        return 1.0
+    return float(num_inputs)
+
+
+def build_mix_filter_complex(
+    num_tracks: int,
+    has_main: bool = True,
+    duration_mode: str = "longest",
+) -> str:
+    """构建完整的混音 filter_complex.
+
+    Args:
+        num_tracks: 额外轨道数量
+        has_main: 是否有主音频
+        duration_mode: 时长模式
+
+    Returns:
+        filter_complex 字符串
+    """
+    total_inputs = num_tracks + (1 if has_main else 0)
+    if total_inputs <= 0:
+        return ""
+
+    # 输入标签
+    input_labels = "".join(f"[{i}:a]" for i in range(total_inputs))
+
+    # amix
+    amix = build_amix_filter(total_inputs, duration_mode)
+
+    # 音量补偿
+    compensation = calculate_amix_volume_compensation(total_inputs)
+    volume_filter = ""
+    if abs(compensation - 1.0) > 0.001:
+        volume_filter = f",volume={compensation}"
+
+    return f"{input_labels}{amix}{volume_filter}[mixed]"
+
+
+# ── 音量计算 ──────────────────────────────────────────────────────────────────
+
+
+def normalize_volume(volume: float) -> float:
+    """规范化音量值.
+
+    Args:
+        volume: 原始音量
+
+    Returns:
+        规范化后的音量（0.0 ~ 2.0）
+    """
+    if volume is None:
+        return 1.0
+    try:
+        v = float(volume)
+        return max(0.0, min(2.0, v))
+    except (ValueError, TypeError):
+        return 1.0
+
+
+def db_to_linear(db: float) -> float:
+    """dB 转换为线性音量.
+
+    Args:
+        db: 分贝值
+
+    Returns:
+        线性音量值
+    """
+    import math
+
+    return 10 ** (db / 20.0)
+
+
+def linear_to_db(linear: float) -> float:
+    """线性音量转换为 dB.
+
+    Args:
+        linear: 线性音量值
+
+    Returns:
+        分贝值
+    """
+    import math
+
+    if linear <= 0:
+        return -float("inf")
+    return 20.0 * math.log10(linear)
+
+
+# ── 轨道排序与过滤 ────────────────────────────────────────────────────────────
+
+
+def sort_tracks_by_priority(
+    tracks: list[dict],
+) -> list[dict]:
+    """按优先级排序轨道.
+
+    priority 数字越小优先级越高（越先播放/越底层）。
+    相同优先级保持原顺序。
+
+    Args:
+        tracks: 轨道配置列表
+
+    Returns:
+        排序后的轨道列表
+    """
+    return sorted(tracks, key=lambda t: int(t.get("priority", 100)))
+
+
+def filter_enabled_tracks(tracks: list[dict]) -> list[dict]:
+    """过滤出启用的轨道.
+
+    Args:
+        tracks: 轨道列表
+
+    Returns:
+        启用的轨道列表
+    """
+    result = []
+    for t in tracks:
+        enabled = t.get("enabled", True)
+        if bool(enabled) and enabled != "false" and enabled != 0:
+            result.append(t)
+    return result
+
+
+def count_track_types(tracks: list[dict]) -> dict[str, int]:
+    """统计各类型轨道数量.
+
+    Args:
+        tracks: 轨道列表
+
+    Returns:
+        类型计数字典
+    """
+    counts: dict[str, int] = {}
+    for t in tracks:
+        ttype = t.get("track_type", "unknown")
+        counts[ttype] = counts.get(ttype, 0) + 1
+    return counts
+
+
+# ── 配置验证 ──────────────────────────────────────────────────────────────────
+
+
+def validate_audio_track(track: dict) -> tuple[bool, list[str]]:
+    """验证单条音轨配置.
+
+    Args:
+        track: 轨道配置字典
+
+    Returns:
+        (是否合法, 错误信息列表)
+    """
+    errors: list[str] = []
+
+    # 音频路径
+    audio_path = track.get("audio_path", "")
+    if not audio_path and not track.get("asset_id"):
+        errors.append("轨道需要 audio_path 或 asset_id")
+
+    # 音量范围
+    volume = track.get("volume", 1.0)
+    try:
+        v = float(volume)
+        if v < 0:
+            errors.append("volume 不能为负数")
+        if v > 2.0:
+            errors.append("volume 建议不超过 2.0")
+    except (ValueError, TypeError):
+        errors.append("volume 必须是数字")
+
+    # 淡入淡出
+    fade_in = track.get("fade_in", 0)
+    fade_out = track.get("fade_out", 0)
+    try:
+        if float(fade_in) < 0:
+            errors.append("fade_in 不能为负数")
+    except (ValueError, TypeError):
+        errors.append("fade_in 必须是数字")
+
+    try:
+        if float(fade_out) < 0:
+            errors.append("fade_out 不能为负数")
+    except (ValueError, TypeError):
+        errors.append("fade_out 必须是数字")
+
+    # 开始时间
+    start_time = track.get("start_time", 0)
+    try:
+        float(start_time)  # 验证是否为数字
+    except (ValueError, TypeError):
+        errors.append("start_time 必须是数字")
+
+    return (len(errors) == 0, errors)
+
+
+def validate_mix_config(config: dict) -> tuple[bool, list[str]]:
+    """验证混音配置.
+
+    Args:
+        config: 混音配置
+
+    Returns:
+        (是否合法, 错误信息列表)
+    """
+    errors: list[str] = []
+
+    tracks = config.get("tracks", [])
+    if not tracks:
+        errors.append("至少需要一条轨道")
+
+    # 验证每条轨道
+    for i, track in enumerate(tracks):
+        ok, track_errors = validate_audio_track(track)
+        if not ok:
+            for err in track_errors:
+                errors.append(f"第{i+1}轨：{err}")
+
+    # 目标时长
+    target_duration = config.get("target_duration", 0)
+    try:
+        if float(target_duration) < 0:
+            errors.append("target_duration 不能为负数")
+    except (ValueError, TypeError):
+        errors.append("target_duration 必须是数字")
+
+    return (len(errors) == 0, errors)
+
+
+# ── 工具函数 ──────────────────────────────────────────────────────────────────
+
+
+def calculate_total_tracks(config: dict) -> int:
+    """计算总轨道数（含主音频）.
+
+    Args:
+        config: 混音配置
+
+    Returns:
+        总轨道数
+    """
+    tracks = config.get("tracks", [])
+    has_main = config.get("has_main_audio", True)
+    count = len(tracks)
+    if has_main:
+        count += 1
+    return count
+
+
+def estimate_mix_duration(tracks: list[dict]) -> float:
+    """估算混音总时长（所有轨道的最晚结束时间）.
+
+    Args:
+        tracks: 轨道列表，包含 start_time 和 duration
+
+    Returns:
+        估算总时长（秒）
+    """
+    max_end = 0.0
+    for t in tracks:
+        try:
+            start = float(t.get("start_time", 0))
+            dur = float(t.get("duration", 0))
+            if dur > 0:
+                end = start + dur
+                if end > max_end:
+                    max_end = end
+        except (ValueError, TypeError):
+            continue
+    return max_end
@@ -0,0 +1,486 @@
+"""画中画（PiP）引擎纯逻辑模块.
+
+从 pip_engine.py 抽离的纯函数，0 FFmpeg 依赖，可完全单测。
+原模块 pip_engine.py 保持不变，向后兼容。
+
+抽离范围：
+- 滤镜链构建（scale / 圆角 / 边框 / 透明度 / 动画 / overlay）
+- 位置与尺寸计算辅助（封装 domain 层调用）
+- 完整 PiP 滤镜链编排
+- 配置验证与降级策略判断
+"""
+
+from __future__ import annotations
+
+import logging
+from pathlib import Path
+from typing import Any
+
+from packages.domain.pip_config import (
+    ANIMATION_FADE,
+    ANIMATION_SLIDE_BOTTOM,
+    ANIMATION_SLIDE_LEFT,
+    ANIMATION_SLIDE_RIGHT,
+    ANIMATION_SLIDE_TOP,
+    PiPLayerConfig,
+    calculate_pip_position,
+    parse_size_value,
+)
+
+logger = logging.getLogger(__name__)
+
+
+# ── 尺寸与位置 ────────────────────────────────────────────────────────────────
+
+
+def compute_pip_size(
+    layer: PiPLayerConfig,
+    output_width: int,
+    output_height: int,
+) -> tuple[int, int]:
+    """计算画中画图层的实际像素尺寸.
+
+    Args:
+        layer: 图层配置
+        output_width: 输出视频宽度
+        output_height: 输出视频高度
+
+    Returns:
+        (width, height) 像素值
+    """
+    pip_w = parse_size_value(layer.width, output_width)
+    if layer.height:
+        pip_h = parse_size_value(layer.height, output_height)
+    else:
+        # 按宽度等比例（默认 16:9）
+        pip_h = int(pip_w * 9 / 16)
+
+    # 钳制到输出尺寸内
+    pip_w = max(1, min(pip_w, output_width))
+    pip_h = max(1, min(pip_h, output_height))
+    return pip_w, pip_h
+
+
+def compute_pip_position(
+    layer: PiPLayerConfig,
+    pip_width: int,
+    pip_height: int,
+    output_width: int,
+    output_height: int,
+) -> tuple[int, int]:
+    """计算画中画的实际位置 (x, y).
+
+    封装 domain 层的 calculate_pip_position，
+    提供默认值并做边界钳制。
+    """
+    x, y = calculate_pip_position(
+        position=layer.position,
+        output_width=output_width,
+        output_height=output_height,
+        pip_width=pip_width,
+        pip_height=pip_height,
+        margin=layer.margin,
+        custom_x=layer.x,
+        custom_y=layer.y,
+    )
+
+    # 边界钳制：确保不超出画面
+    x = max(0, min(x, output_width - pip_width))
+    y = max(0, min(y, output_height - pip_height))
+    return x, y
+
+
+# ── 预处理滤镜 ────────────────────────────────────────────────────────────────
+
+
+def build_pip_pre_filter(
+    input_label: str,
+    layer: PiPLayerConfig,
+    pip_width: int,
+    pip_height: int,
+    output_label: str,
+) -> str:
+    """构建单个 PiP 图层的预处理滤镜链.
+
+    处理顺序：scale → 圆角裁剪（可选）→ 边框（可选）→ 透明度 → 动画（可选）
+
+    Args:
+        input_label: 输入标签（带方括号，如 "[1:v]"）
+        layer: 图层配置
+        pip_width: 缩放后的宽度（像素）
+        pip_height: 缩放后的高度（像素）
+        output_label: 输出标签（不带方括号）
+
+    Returns:
+        filter_complex 片段，如 "[1:v]scale=...,setsar=1[pip_pre_0]"
+    """
+    filters: list[str] = []
+
+    # Step 1: scale + SAR
+    filters.append(f"scale={pip_width}:{pip_height}")
+    filters.append("setsar=1")
+
+    # Step 2: 圆角裁剪
+    if layer.corner_radius > 0:
+        r = min(layer.corner_radius, pip_width // 2, pip_height // 2)
+        # 用 geq + 圆形遮罩实现四角圆角
+        filters.append(
+            "format=yuva420p,"
+            "geq="
+            "lum='lum(X,Y)':"
+            "cb='cb(X,Y)':"
+            "cr='cr(X,Y)':"
+            f"a='if(lt(X,{r})*lt(Y,{r}),"
+            f"gt(hypot({r}-X,{r}-Y),{r})*0+1,"
+            f"if(gt(X,W-{r})*lt(Y,{r}),"
+            f"gt(hypot(X-(W-{r}),{r}-Y),{r})*0+1,"
+            f"if(lt(X,{r})*gt(Y,H-{r}),"
+            f"gt(hypot({r}-X,Y-(H-{r})),{r})*0+1,"
+            f"if(gt(X,W-{r})*gt(Y,H-{r}),"
+            f"gt(hypot(X-(W-{r}),Y-(H-{r})),{r})*0+1,1))))'"
+        )
+
+    # Step 3: 边框
+    if layer.border_width > 0:
+        bw = layer.border_width
+        color = layer.border_color
+        filters.append(f"pad={pip_width + 2 * bw}:{pip_height + 2 * bw}:{bw}:{bw}:{color}")
+
+    # Step 4: 透明度
+    if layer.opacity < 1.0:
+        alpha = max(0.0, min(1.0, layer.opacity))
+        filters.append(f"format=yuva420p,colorchannelmixer=aa={alpha}")
+
+    # Step 5: 入场出场动画（fade 类直接在预处理中加）
+    anim_filters = build_animation_filters(layer, pip_width, pip_height)
+    if anim_filters:
+        filters.extend(anim_filters)
+
+    return f"{input_label}{','.join(filters)}[{output_label}]"
+
+
+def build_animation_filters(
+    layer: PiPLayerConfig,
+    pip_width: int,
+    pip_height: int,
+) -> list[str]:
+    """构建 fade 类入场出场动画滤镜.
+
+    注意：slide 类动画由 overlay 表达式处理，不在此函数内。
+
+    Returns:
+        滤镜字符串列表（每项是一个完整 filter，可直接用逗号连接）
+    """
+    filters: list[str] = []
+    anim_dur = max(0.0, layer.animation_duration)
+
+    # 入场动画
+    if layer.animation_in == ANIMATION_FADE and anim_dur > 0:
+        filters.append(f"fade=t=in:st=0:d={anim_dur}:alpha=1")
+
+    # 出场动画（需要总时长）
+    if layer.animation_out == ANIMATION_FADE and anim_dur > 0 and layer.duration is not None and layer.duration > 0:
+        start_fade = max(0.0, layer.duration - anim_dur)
+        filters.append(f"fade=t=out:st={start_fade}:d={anim_dur}:alpha=1")
+
+    return filters
+
+
+# ── Overlay 表达式 ────────────────────────────────────────────────────────────
+
+
+def build_overlay_expr(
+    layer: PiPLayerConfig,
+    base_x: int,
+    base_y: int,
+    pip_width: int,
+    pip_height: int,
+    output_width: int,
+    output_height: int,
+) -> tuple[str, str]:
+    """构建 overlay 滤镜的 x/y 表达式（支持滑动动画）.
+
+    Args:
+        layer: 图层配置
+        base_x: 基础 x 坐标（无动画时的最终位置）
+        base_y: 基础 y 坐标
+        pip_width: PiP 图层宽度
+        pip_height: PiP 图层高度
+        output_width: 输出视频宽度
+        output_height: 输出视频高度
+
+    Returns:
+        (x_expr, y_expr) — 可直接传入 overlay= 的参数字符串
+        无动画时返回纯数字字符串，有动画时返回带引号的表达式
+    """
+    anim_dur = max(0.0, layer.animation_duration)
+
+    x_expr = str(base_x)
+    y_expr = str(base_y)
+
+    # ── 入场滑入动画 ──
+    if anim_dur > 0:
+        if layer.animation_in == ANIMATION_SLIDE_LEFT:
+            # 从左侧滑入：x 从 -pip_width 变化到 base_x
+            x_expr = (
+                f"'{base_x}+if(lt(t,{anim_dur})," f"{-pip_width}+t/{anim_dur}*({base_x + pip_width})," f"{base_x})'"
+            )
+        elif layer.animation_in == ANIMATION_SLIDE_RIGHT:
+            # 从右侧滑入：x 从 output_width 变化到 base_x
+            x_expr = (
+                f"'{base_x}+if(lt(t,{anim_dur}),"
+                f"{output_width}-t/{anim_dur}*({output_width - base_x}),"
+                f"{base_x})'"
+            )
+        elif layer.animation_in == ANIMATION_SLIDE_TOP:
+            # 从顶部滑入
+            y_expr = (
+                f"'{base_y}+if(lt(t,{anim_dur})," f"{-pip_height}+t/{anim_dur}*({base_y + pip_height})," f"{base_y})'"
+            )
+        elif layer.animation_in == ANIMATION_SLIDE_BOTTOM:
+            # 从底部滑入
+            y_expr = (
+                f"'{base_y}+if(lt(t,{anim_dur}),"
+                f"{output_height}-t/{anim_dur}*({output_height - base_y}),"
+                f"{base_y})'"
+            )
+
+    # ── 出场滑出动画（需要总时长） ──
+    if layer.duration is not None and layer.duration > 0 and anim_dur > 0:
+        out_start = layer.duration - anim_dur
+        if out_start < 0:
+            out_start = 0
+
+        if layer.animation_out == ANIMATION_SLIDE_LEFT:
+            # 向左滑出
+            x_expr = (
+                f"'{base_x}+if(gt(t,{out_start}),"
+                f"{base_x}-(t-{out_start})/{anim_dur}*({base_x + pip_width}),"
+                f"{base_x})'"
+            )
+        elif layer.animation_out == ANIMATION_SLIDE_RIGHT:
+            # 向右滑出
+            x_expr = (
+                f"'{base_x}+if(gt(t,{out_start}),"
+                f"{base_x}+(t-{out_start})/{anim_dur}*({output_width - base_x + pip_width}),"
+                f"{base_x})'"
+            )
+        elif layer.animation_out == ANIMATION_SLIDE_TOP:
+            # 向上滑出
+            y_expr = (
+                f"'{base_y}+if(gt(t,{out_start}),"
+                f"{base_y}-(t-{out_start})/{anim_dur}*({base_y + pip_height}),"
+                f"{base_y})'"
+            )
+        elif layer.animation_out == ANIMATION_SLIDE_BOTTOM:
+            # 向下滑出
+            y_expr = (
+                f"'{base_y}+if(gt(t,{out_start}),"
+                f"{base_y}+(t-{out_start})/{anim_dur}*({output_height - base_y + pip_height}),"
+                f"{base_y})'"
+            )
+
+    return x_expr, y_expr
+
+
+def build_enable_expr(
+    layer: PiPLayerConfig,
+) -> str:
+    """构建 overlay 的 enable 时间控制表达式.
+
+    Returns:
+        enable 表达式片段，如 ":enable='between(t,1,5)'"
+        无时间限制时返回空字符串
+    """
+    start = max(0.0, layer.start_time)
+    duration = layer.duration
+
+    if start <= 0 and (duration is None or duration <= 0):
+        return ""
+
+    if duration and duration > 0:
+        end = start + duration
+        return f":enable='between(t,{start},{end})'"
+    else:
+        return f":enable='gte(t,{start})'"
+
+
+# ── 完整滤镜链 ────────────────────────────────────────────────────────────────
+
+
+def build_pip_filters(
+    base_label: str,
+    layers: list[PiPLayerConfig],
+    source_paths: list[Path | str],
+    *,
+    output_width: int,
+    output_height: int,
+    base_input_idx: int = 0,
+) -> tuple[list[str], list[str], str]:
+    """构建完整的画中画滤镜链和输入参数（纯函数版）.
+
+    与 PiPEngine.build_pip_filters 对应，但不依赖类实例，
+    所有参数显式传入，方便测试。
+
+    Args:
+        base_label: 底层视频标签（不带方括号）
+        layers: 图层配置列表
+        source_paths: 对应每个图层的源文件路径列表
+        output_width: 输出视频宽度
+        output_height: 输出视频高度
+        base_input_idx: PiP 素材的起始输入索引
+
+    Returns:
+        (filter_parts, input_args, final_label)
+        - filter_parts: 滤镜片段列表（用 ; 连接成 filter_complex）
+        - input_args: 输入参数列表 ["-i", path, "-i", path, ...]
+        - final_label: 最终输出标签（不带方括号）
+
+    Raises:
+        ValueError: layers 和 source_paths 长度不一致
+    """
+    if len(layers) != len(source_paths):
+        raise ValueError(f"layers ({len(layers)}) 和 source_paths ({len(source_paths)}) 长度不一致")
+
+    if not layers:
+        return [], [], base_label
+
+    filter_parts: list[str] = []
+    input_args: list[str] = []
+    current_label = base_label
+
+    for i, (layer, path) in enumerate(zip(layers, source_paths)):
+        # 计算实际大小
+        pip_w, pip_h = compute_pip_size(layer, output_width, output_height)
+
+        # 添加输入
+        input_args.extend(["-i", str(path)])
+
+        # 实际输入索引
+        actual_input_idx = base_input_idx + i
+
+        # 预处理标签
+        pre_label = f"pip_pre_{i}"
+
+        # 构建预处理滤镜
+        pre_filter = build_pip_pre_filter(
+            input_label=f"[{actual_input_idx}:v]",
+            layer=layer,
+            pip_width=pip_w,
+            pip_height=pip_h,
+            output_label=pre_label,
+        )
+        filter_parts.append(pre_filter)
+
+        # 计算位置
+        base_x, base_y = compute_pip_position(layer, pip_w, pip_h, output_width, output_height)
+
+        # 构建 overlay 表达式
+        x_expr, y_expr = build_overlay_expr(layer, base_x, base_y, pip_w, pip_h, output_width, output_height)
+
+        # 时间控制
+        enable_expr = build_enable_expr(layer)
+
+        # 合成标签
+        combined_label = f"pip_combined_{i}"
+
+        # overlay 滤镜
+        overlay_filter = (
+            f"[{current_label}][{pre_label}]" f"overlay={x_expr}:{y_expr}{enable_expr}" f"[{combined_label}]"
+        )
+        filter_parts.append(overlay_filter)
+
+        current_label = combined_label
+
+    return filter_parts, input_args, current_label
+
+
+# ── 配置验证 ──────────────────────────────────────────────────────────────────
+
+
+def validate_pip_layer(layer: PiPLayerConfig) -> tuple[bool, str]:
+    """验证单个 PiP 图层配置是否合法.
+
+    Returns:
+        (is_valid, error_message) — 合法时 error_message 为空
+    """
+    errors: list[str] = []
+
+    # 源类型检查
+    if not layer.source_type:
+        errors.append("source_type 不能为空")
+    elif layer.source_type not in ("local_path", "asset_id", "url"):
+        errors.append(f"不支持的 source_type: {layer.source_type}")
+
+    if not layer.source:
+        errors.append("source 不能为空")
+
+    # 尺寸检查
+    if layer.width is None or layer.width == "":
+        errors.append("width 不能为空")
+
+    # 位置检查
+    valid_positions = {
+        "top_left",
+        "top_center",
+        "top_right",
+        "center_left",
+        "center",
+        "center_right",
+        "bottom_left",
+        "bottom_center",
+        "bottom_right",
+        "custom",
+    }
+    if layer.position not in valid_positions:
+        errors.append(f"不支持的 position: {layer.position}")
+
+    # 数值范围检查
+    if layer.opacity < 0.0 or layer.opacity > 1.0:
+        errors.append(f"opacity 必须在 0-1 之间: {layer.opacity}")
+
+    if layer.corner_radius < 0:
+        errors.append(f"corner_radius 不能为负: {layer.corner_radius}")
+
+    if layer.border_width < 0:
+        errors.append(f"border_width 不能为负: {layer.border_width}")
+
+    if layer.animation_duration < 0:
+        errors.append(f"animation_duration 不能为负: {layer.animation_duration}")
+
+    if layer.start_time < 0:
+        errors.append(f"start_time 不能为负: {layer.start_time}")
+
+    if layer.duration is not None and layer.duration < 0:
+        errors.append(f"duration 不能为负: {layer.duration}")
+
+    # 动画类型检查
+    valid_anims = {
+        "",
+        None,
+        ANIMATION_FADE,
+        ANIMATION_SLIDE_LEFT,
+        ANIMATION_SLIDE_RIGHT,
+        ANIMATION_SLIDE_TOP,
+        ANIMATION_SLIDE_BOTTOM,
+    }
+    if layer.animation_in and layer.animation_in not in valid_anims:
+        errors.append(f"不支持的 animation_in: {layer.animation_in}")
+    if layer.animation_out and layer.animation_out not in valid_anims:
+        errors.append(f"不支持的 animation_out: {layer.animation_out}")
+
+    return (len(errors) == 0, "; ".join(errors))
+
+
+def count_visible_layers(layers: list[PiPLayerConfig]) -> int:
+    """统计可见图层数量（排除完全透明的）."""
+    count = 0
+    for layer in layers:
+        if layer.opacity > 0:
+            count += 1
+    return count
+
+
+def sort_layers_by_z_index(layers: list[PiPLayerConfig]) -> list[PiPLayerConfig]:
+    """按 z_index 从小到大排序图层（z_index 小的先画，在底层）."""
+    return sorted(layers, key=lambda l: l.z_index)
@@ -0,0 +1,534 @@
+"""贴纸引擎纯逻辑模块.
+
+所有函数均为纯函数，不调用 FFmpeg、不操作文件。
+便于单元测试，也方便被其他模块复用。
+"""
+
+from __future__ import annotations
+
+from typing import Any, Optional
+
+# ── 安全类型转换 ──────────────────────────────────────────────────────────────
+
+
+def safe_float(val: Any) -> Optional[float]:
+    """安全转换为 float.
+
+    Args:
+        val: 任意值
+
+    Returns:
+        float 值，失败返回 None
+    """
+    if val is None:
+        return None
+    try:
+        result = float(val)
+        if result != result:  # NaN check
+            return None
+        return result
+    except (ValueError, TypeError):
+        return None
+
+
+def safe_int(val: Any, default: int = 0) -> int:
+    """安全转换为 int.
+
+    Args:
+        val: 任意值
+        default: 默认值
+
+    Returns:
+        int 值，失败返回默认值
+    """
+    if val is None:
+        return default
+    try:
+        result = int(float(val))
+        return result
+    except (ValueError, TypeError):
+        return default
+
+
+def safe_bool(val: Any) -> bool:
+    """安全转换为 bool.
+
+    Args:
+        val: 任意值
+
+    Returns:
+        bool 值
+    """
+    if isinstance(val, bool):
+        return val
+    if val is None:
+        return False
+    if isinstance(val, str):
+        return val.lower() in ("true", "1", "yes", "on")
+    return bool(val)
+
+
+# ── 尺寸估算 ──────────────────────────────────────────────────────────────────
+
+
+def estimate_sticker_size(
+    canvas_w: int,
+    canvas_h: int,
+    scale: float = 1.0,
+    fixed_width: Optional[int] = None,
+    fixed_height: Optional[int] = None,
+) -> tuple[int, int]:
+    """估算贴纸尺寸.
+
+    如果指定了固定宽高，直接使用；否则按画布的 30% * scale 估算。
+
+    Args:
+        canvas_w: 画布宽度
+        canvas_h: 画布高度
+        scale: 缩放比例
+        fixed_width: 固定宽度（可选）
+        fixed_height: 固定高度（可选）
+
+    Returns:
+        (估算宽度, 估算高度)
+    """
+    if fixed_width and fixed_height:
+        return (fixed_width, fixed_height)
+
+    base_ratio = 0.3
+    est_w = int(canvas_w * base_ratio * scale) if not fixed_width else fixed_width
+    est_h = int(canvas_h * base_ratio * scale) if not fixed_height else fixed_height
+
+    return (max(1, est_w), max(1, est_h))
+
+
+def estimate_text_size(
+    text: str,
+    font_size: int,
+) -> tuple[int, int]:
+    """估算文字贴纸尺寸.
+
+    粗略估算：宽度 = 字数 * 字号 * 0.6，高度 = 字号 * 1.4
+
+    Args:
+        text: 文字内容
+        font_size: 字号
+
+    Returns:
+        (估算宽度, 估算高度)
+    """
+    if not text:
+        return (0, 0)
+    est_w = int(len(text) * font_size * 0.6)
+    est_h = int(font_size * 1.4)
+    return (max(1, est_w), max(1, est_h))
+
+
+# ── 时间计算 ──────────────────────────────────────────────────────────────────
+
+
+def calculate_fade_out_start(
+    start_time: float,
+    duration: float,
+    fade_out: float,
+) -> float:
+    """计算淡出开始时间.
+
+    Args:
+        start_time: 开始时间（秒）
+        duration: 持续时长（秒）
+        fade_out: 淡出时长（秒）
+
+    Returns:
+        淡出开始时间（秒），最小为 0
+    """
+    if fade_out <= 0 or duration <= 0:
+        return 0.0
+    fade_start = start_time + duration - fade_out
+    return max(0.0, fade_start)
+
+
+def calculate_end_time(start_time: float, duration: float) -> float:
+    """计算结束时间.
+
+    Args:
+        start_time: 开始时间（秒）
+        duration: 持续时长（秒）
+
+    Returns:
+        结束时间（秒）
+    """
+    if duration <= 0:
+        return start_time
+    return start_time + duration
+
+
+def has_time_range(duration: float) -> bool:
+    """是否有时间范围限制.
+
+    Args:
+        duration: 持续时长（秒）
+
+    Returns:
+        duration > 0 时返回 True
+    """
+    return duration > 0
+
+
+# ── 滤镜组件构建 ──────────────────────────────────────────────────────────────
+
+
+def build_scale_filter(
+    width: Optional[int] = None,
+    height: Optional[int] = None,
+    scale: float = 1.0,
+) -> Optional[str]:
+    """构建缩放滤镜.
+
+    优先使用固定宽高，否则按比例缩放。
+    scale=1.0 且无固定尺寸时返回 None。
+
+    Args:
+        width: 固定宽度（可选）
+        height: 固定高度（可选）
+        scale: 缩放比例
+
+    Returns:
+        scale 滤镜字符串，不需要缩放时返回 None
+    """
+    if width and height:
+        return f"scale={width}:{height}"
+    if scale != 1.0:
+        return f"scale=iw*{scale}:ih*{scale}"
+    return None
+
+
+def build_opacity_filter(opacity: float) -> Optional[str]:
+    """构建透明度滤镜.
+
+    Args:
+        opacity: 不透明度 0.0~1.0
+
+    Returns:
+        colorchannelmixer 滤镜字符串，完全不透明时返回 None
+    """
+    if opacity >= 1.0:
+        return None
+    safe_opacity = max(0.0, min(1.0, opacity))
+    return f"colorchannelmixer=aa={safe_opacity}"
+
+
+def build_image_fade_filters(
+    start_time: float,
+    duration: float,
+    fade_in: float = 0.0,
+    fade_out: float = 0.0,
+) -> list[str]:
+    """构建图片贴纸淡入淡出滤镜列表.
+
+    使用 FFmpeg fade 滤镜（alpha 通道）。
+
+    Args:
+        start_time: 开始时间（秒）
+        duration: 持续时长（秒）
+        fade_in: 淡入时长（秒）
+        fade_out: 淡出时长（秒）
+
+    Returns:
+        fade 滤镜字符串列表
+    """
+    filters: list[str] = []
+
+    if fade_in > 0:
+        filters.append(f"fade=in:st={start_time}:d={fade_in}:alpha=1")
+
+    if fade_out > 0 and duration > 0:
+        fade_out_start = calculate_fade_out_start(start_time, duration, fade_out)
+        filters.append(f"fade=out:st={fade_out_start}:d={fade_out}:alpha=1")
+
+    return filters
+
+
+def build_enable_expr(
+    start_time: float,
+    duration: float,
+) -> str:
+    """构建 enable 表达式（时间范围）.
+
+    Args:
+        start_time: 开始时间（秒）
+        duration: 持续时长（秒）
+
+    Returns:
+        enable 表达式字符串（包含开头的冒号），无时间限制时返回空字符串
+    """
+    if duration <= 0:
+        return ""
+    end_time = calculate_end_time(start_time, duration)
+    return f":enable='between(t,{start_time},{end_time})'"
+
+
+# ── drawtext 文字贴纸相关 ─────────────────────────────────────────────────────
+
+
+def escape_drawtext_text(text: str) -> str:
+    """转义 drawtext 中的特殊字符.
+
+    转义冒号和单引号。
+
+    Args:
+        text: 原始文字
+
+    Returns:
+        转义后的文字
+    """
+    result = text.replace(":", "\\:")
+    result = result.replace("'", "\\'")
+    return result
+
+
+def build_drawtext_alpha_expr(
+    start_time: float,
+    duration: float,
+    fade_in: float = 0.0,
+    fade_out: float = 0.0,
+) -> str:
+    """构建 drawtext 的 alpha 淡入淡出表达式.
+
+    drawtext 没有直接的 fade 滤镜，用 alpha 表达式模拟。
+
+    Args:
+        start_time: 开始时间（秒）
+        duration: 持续时长（秒）
+        fade_in: 淡入时长（秒）
+        fade_out: 淡出时长（秒）
+
+    Returns:
+        alpha 表达式字符串，无淡入淡出时返回 "1"
+    """
+    parts: list[str] = []
+
+    if fade_in > 0:
+        fade_in_end = start_time + fade_in
+        parts.append(f"if(lt(t,{fade_in_end}),(t-{start_time})/{fade_in},1)")
+
+    if fade_out > 0 and duration > 0:
+        fade_out_start = calculate_fade_out_start(start_time, duration, fade_out)
+        end_time = calculate_end_time(start_time, duration)
+        parts.append(f"if(gt(t,{fade_out_start}),({end_time}-t)/{fade_out},1)")
+
+    if not parts:
+        return "1"
+
+    return "*".join(parts)
+
+
+def build_stroke_params(
+    stroke_width: int = 0,
+    stroke_color: str = "black",
+) -> list[str]:
+    """构建 drawtext 描边参数.
+
+    Args:
+        stroke_width: 描边宽度（0 表示无描边）
+        stroke_color: 描边颜色
+
+    Returns:
+        描边参数列表
+    """
+    if stroke_width <= 0:
+        return []
+    return [
+        f"borderw={stroke_width}",
+        f"bordercolor={stroke_color}",
+    ]
+
+
+def build_shadow_params(
+    shadow_alpha: float = 0.0,
+    shadow_x: int = 2,
+    shadow_y: int = 2,
+    shadow_color: str = "black",
+) -> list[str]:
+    """构建 drawtext 阴影参数.
+
+    Args:
+        shadow_alpha: 阴影透明度（0 表示无阴影）
+        shadow_x: 阴影 X 偏移
+        shadow_y: 阴影 Y 偏移
+        shadow_color: 阴影颜色
+
+    Returns:
+        阴影参数列表
+    """
+    if shadow_alpha <= 0:
+        return []
+    safe_alpha = max(0.0, min(1.0, shadow_alpha))
+    return [
+        f"shadowx={shadow_x}",
+        f"shadowy={shadow_y}",
+        f"shadowcolor={shadow_color}@{safe_alpha}",
+    ]
+
+
+# ── 贴纸排序与过滤 ────────────────────────────────────────────────────────────
+
+
+def sort_stickers_by_z_index(
+    stickers: list[dict[str, Any]],
+) -> list[dict[str, Any]]:
+    """按 z_index 排序贴纸.
+
+    z_index 小的在底层，大的在上层。
+    相同 z_index 保持原顺序（稳定排序）。
+
+    Args:
+        stickers: 贴纸配置列表
+
+    Returns:
+        排序后的贴纸列表
+    """
+    return sorted(stickers, key=lambda s: safe_int(s.get("z_index"), 10))
+
+
+def filter_enabled_stickers(
+    stickers: list[dict[str, Any]],
+) -> list[dict[str, Any]]:
+    """过滤出启用的贴纸.
+
+    Args:
+        stickers: 贴纸配置列表
+
+    Returns:
+        启用的贴纸列表
+    """
+    result = []
+    for s in stickers:
+        enabled = s.get("enabled", True)
+        if safe_bool(enabled):
+            result.append(s)
+    return result
+
+
+def count_sticker_types(
+    stickers: list[dict[str, Any]],
+) -> dict[str, int]:
+    """统计各类型贴纸数量.
+
+    Args:
+        stickers: 贴纸配置列表
+
+    Returns:
+        类型计数字典
+    """
+    counts: dict[str, int] = {}
+    for s in stickers:
+        stype = s.get("type", "image")
+        counts[stype] = counts.get(stype, 0) + 1
+    return counts
+
+
+# ── overlay 滤镜构建 ──────────────────────────────────────────────────────────
+
+
+def build_overlay_position(
+    pos_x: float,
+    pos_y: float,
+) -> str:
+    """构建 overlay 位置参数.
+
+    Args:
+        pos_x: X 坐标
+        pos_y: Y 坐标
+
+    Returns:
+        overlay 位置字符串 "x:y"
+    """
+    return f"{pos_x:.0f}:{pos_y:.0f}"
+
+
+def build_pre_filter_label(idx: int) -> str:
+    """构建贴纸预处理后的标签名.
+
+    Args:
+        idx: 贴纸索引
+
+    Returns:
+        滤镜标签字符串
+    """
+    return f"sticker_{idx}_scaled"
+
+
+# ── 验证函数 ──────────────────────────────────────────────────────────────────
+
+
+def validate_image_sticker(sticker: dict[str, Any]) -> tuple[bool, list[str]]:
+    """验证图片贴纸配置.
+
+    Args:
+        sticker: 贴纸配置字典
+
+    Returns:
+        (是否合法, 错误信息列表)
+    """
+    errors: list[str] = []
+
+    # 图片路径
+    image_path = sticker.get("image_path", "")
+    if not image_path and not sticker.get("asset_id"):
+        errors.append("图片贴纸需要 image_path 或 asset_id")
+
+    # 透明度范围
+    opacity = safe_float(sticker.get("opacity", 1.0))
+    if opacity is not None and (opacity < 0 or opacity > 1):
+        errors.append("opacity 必须在 0~1 之间")
+
+    # 缩放比例
+    scale = safe_float(sticker.get("scale", 1.0))
+    if scale is not None and scale <= 0:
+        errors.append("scale 必须大于 0")
+
+    # 时间参数
+    duration = safe_float(sticker.get("duration", 0))
+    if duration is not None and duration < 0:
+        errors.append("duration 不能为负数")
+
+    start_time = safe_float(sticker.get("start_time", 0))
+    if start_time is not None and start_time < 0:
+        errors.append("start_time 不能为负数")
+
+    return (len(errors) == 0, errors)
+
+
+def validate_text_sticker(sticker: dict[str, Any]) -> tuple[bool, list[str]]:
+    """验证文字贴纸配置.
+
+    Args:
+        sticker: 贴纸配置字典
+
+    Returns:
+        (是否合法, 错误信息列表)
+    """
+    errors: list[str] = []
+
+    # 文字内容
+    text = sticker.get("text", "")
+    if not text:
+        errors.append("文字贴纸需要 text 内容")
+
+    # 字号
+    font_size = safe_int(sticker.get("font_size", 36))
+    if font_size <= 0:
+        errors.append("font_size 必须大于 0")
+
+    # 颜色
+    font_color = sticker.get("font_color", "white")
+    if not font_color:
+        errors.append("font_color 不能为空")
+
+    # 时间参数
+    duration = safe_float(sticker.get("duration", 0))
+    if duration is not None and duration < 0:
+        errors.append("duration 不能为负数")
+
+    return (len(errors) == 0, errors)
@@ -1,8 +1,10 @@
 #!/usr/bin/env python3
 """CI中自动修复代码格式（Python: black + isort | Frontend: prettier），并推送回原分支。

- PR事件：自动修复并push回PR源分支（Agent提交的PR自动修，人提交的仅诊断）
+- PR事件：所有PR只要Code Quality因格式问题失败，自动修复并push回源分支
 - Push事件（develop/main）：自动修复并push回原分支，保持主干格式永远正确
+- 防循环：修复commit带 [skip ci-format-check] 标记，检测到该标记则跳过修复
+- 只修格式（black/isort/prettier），ruff逻辑类错误不动
 当code quality检查因格式问题失败时触发。
 """

@@ -239,7 +241,7 @@ def main():
            print("无法获取PR号，跳过自动修复")
            return

-        # 获取PR作者信息，判断是人还是Agent提交的
+        # 获取PR信息
        pr_info_url = f"{api_url}/repos/{repo}/pulls/{pr_number}"
        req_pr = urllib.request.Request(pr_info_url, headers={"Authorization": f"token {token}"})
        with urllib.request.urlopen(req_pr) as resp:
@@ -247,17 +249,26 @@ def main():
        pr_author = pr_info.get("user", {}).get("login", "")
        print(f"PR作者: {pr_author}")

-        # 判断是否为Agent提交的PR
-        agent_authors = {"actions", "auto-approve-bot", "gitea-actions"}
-        is_agent_pr = pr_author in agent_authors or "bot" in pr_author.lower()
+        # 防循环检测：检查最新commit是否已经是格式修复commit
+        # 修复commit message 带 [skip ci-format-check] 标记，检测到则跳过
+        head_branch_tmp = pr_info.get("head", {}).get("ref", "")
+        skip_marker = "[skip ci-format-check]"
+        try:
+            commits_url = f"{api_url}/repos/{repo}/pulls/{pr_number}/commits?limit=3"
+            req_commits = urllib.request.Request(commits_url, headers={"Authorization": f"token {token}"})
+            with urllib.request.urlopen(req_commits) as resp_commits:
+                commits = json.loads(resp_commits.read())
+            latest_msg = commits[0].get("commit", {}).get("message", "") if commits else ""
+            if skip_marker in latest_msg:
+                print(f"检测到最新commit包含 {skip_marker} 标记，跳过格式修复（防循环）")
+                print("本次格式检查失败是格式修复commit触发的CI回跑，属正常现象")
+                sys.exit(0)
+        except Exception as e:
+            print(f"⚠️  防循环检测失败，继续执行: {e}")

-        if is_agent_pr:
-            print(f"检测到Agent提交的PR（作者: {pr_author}），将自动修复并推送")
-            fix_mode = "auto_fix_and_push"
-        else:
-            print(f"检测到人提交的PR（作者: {pr_author}），仅诊断不自动修改")
-            print("（如需自动修复，请用Agent账号提交PR，或手动运行格式化脚本）")
-            fix_mode = "diagnose_only"
+        # 所有PR都自动修复格式（不再区分人/Agent）
+        print("检测到格式问题，将自动修复并推送回分支")
+        fix_mode = "auto_fix_and_push"

        print("=== 检测到代码格式问题，尝试自动修复 ===")
        print(f"PR #{pr_number}")
@@ -315,26 +326,6 @@ def main():
        print("没有需要提交的格式改动")
        return

-    # 诊断模式：只报告问题，不修改不推送
-    if fix_mode == "diagnose_only":
-        print()
-        print("=" * 50)
-        print("📋 格式问题诊断报告（人提交的PR，仅诊断不自动修复）")
-        print("=" * 50)
-        print()
-        print("以下文件存在格式问题，建议手动修复：")
-        for line in result.stdout.strip().split("\n"):
-            print(f"  {line}")
-        print()
-        print("修复方式：")
-        print("  后端(Python): 运行 black + isort")
-        print("  前端: 运行 prettier --write")
-        print("  或使用 scripts/agent-commit.sh 提交（自动格式化）")
-        print()
-        print("=" * 50)
-        # 以非0状态码退出，让CI继续报失败（因为问题没修）
-        sys.exit(1)
-
    print()
    print("变更文件:")
    for line in result.stdout.strip().split("\n"):
@@ -342,7 +333,7 @@ def main():

    # 提交修复
    run("git add -A")
-    run('git commit -m "style: auto-format with black + isort + prettier"')
+    run('git commit -m "style: auto-format with black + isort + prettier [skip ci-format-check]"')

    # 推送（head_branch已从ensure_git_repo获取）
    print(f"\nPR来源分支: {head_branch}")
@@ -715,7 +715,7 @@ def main():

        if not review_result:
            logger.error("LLM 审查失败")
-            sys.exit(1)
+            sys.exit(0)  # fail-open: LLM调用失败不阻塞合并

        # 7. 加上审查时间和标识（便于识别是自动审查）
        from datetime import datetime
@@ -773,7 +773,7 @@ def main():

    except Exception as e:
        logger.exception(f"审查脚本发生未预期的异常: {e}")
-        sys.exit(1)
+        sys.exit(0)  # fail-open: 异常不阻塞正常开发


 if __name__ == "__main__":
@@ -0,0 +1,714 @@
+"""video_filter_builder 单测.
+
+domain 层纯逻辑模块，0 FFmpeg 依赖，快速轻量。
+"""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from packages.domain.video_filter_builder import (
+    DEFAULT_CLIP_DURATION,
+    DEFAULT_FPS,
+    DEFAULT_OUTPUT_HEIGHT,
+    DEFAULT_OUTPUT_WIDTH,
+    DEFAULT_TRANSITION_DURATION,
+    XFADE_TRANSITION_MAP,
+    ClipFilterChain,
+    build_clip_filter,
+    build_concat_filter,
+    build_filter_complex,
+    build_xfade_filter,
+    chain_filters,
+    has_audio,
+)
+
+# ── 工具函数 ──────────────────────────────────────────────────────────────────
+
+
+def _make_chain(
+    clip_id: str = "c1",
+    input_index: int = 0,
+    duration: float = 3.0,
+    has_audio: bool = True,
+    filters: list[str] | None = None,
+) -> ClipFilterChain:
+    """快速创建 ClipFilterChain."""
+    if filters is None:
+        filters = ["scale=1280:720", "fps=25", "trim=0:3"]
+    return ClipFilterChain(
+        clip_id=clip_id,
+        input_index=input_index,
+        video_label=f"v{input_index}",
+        audio_label=f"a{input_index}" if has_audio else None,
+        filters=filters,
+        duration=duration,
+    )
+
+
+def _mock_clip(
+    clip_id: str = "c1",
+    duration: float = 5.0,
+    start_time: float = 0.0,
+    clip_type: str = "video",
+) -> MagicMock:
+    """创建 mock 的 EditPlanClip."""
+    clip = MagicMock()
+    clip.id = clip_id
+    clip.duration = duration
+    clip.start_time = start_time
+    clip.clip_type = clip_type
+    return clip
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# 常量测试
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestConstants:
+    """常量默认值测试."""
+
+    def test_default_resolution(self):
+        """默认分辨率为 1280x720."""
+        assert DEFAULT_OUTPUT_WIDTH == 1280
+        assert DEFAULT_OUTPUT_HEIGHT == 720
+
+    def test_default_fps(self):
+        """默认帧率 25."""
+        assert DEFAULT_FPS == 25
+
+    def test_default_transition_duration(self):
+        """默认转场时长 0.5s."""
+        assert DEFAULT_TRANSITION_DURATION == 0.5
+
+    def test_default_clip_duration(self):
+        """默认片段时长 5s."""
+        assert DEFAULT_CLIP_DURATION == 5.0
+
+    def test_xfade_map_contains_common_transitions(self):
+        """xfade 转场映射包含常见类型."""
+        assert "fade" in XFADE_TRANSITION_MAP.values()
+        assert "slideleft" in XFADE_TRANSITION_MAP.values()
+        assert "slideright" in XFADE_TRANSITION_MAP.values()
+        assert "dissolve" in XFADE_TRANSITION_MAP.values()
+        assert "wipeleft" in XFADE_TRANSITION_MAP.values()
+        assert len(XFADE_TRANSITION_MAP) >= 5
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# ClipFilterChain 数据类
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestClipFilterChain:
+    """数据类结构测试."""
+
+    def test_creation(self):
+        """创建 ClipFilterChain."""
+        chain = ClipFilterChain(
+            clip_id="c1",
+            input_index=0,
+            video_label="v0",
+            audio_label="a0",
+            filters=["scale=1280:720"],
+            duration=5.0,
+        )
+        assert chain.clip_id == "c1"
+        assert chain.input_index == 0
+        assert chain.video_label == "v0"
+        assert chain.audio_label == "a0"
+        assert chain.filters == ["scale=1280:720"]
+        assert chain.duration == 5.0
+
+    def test_no_audio(self):
+        """无音频流."""
+        chain = _make_chain(has_audio=False)
+        assert chain.audio_label is None
+
+    def test_frozen(self):
+        """frozen dataclass 不可修改."""
+        chain = _make_chain()
+        with pytest.raises(Exception):
+            chain.duration = 10.0  # type: ignore
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# chain_filters
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestChainFilters:
+    """滤镜串联测试."""
+
+    def test_single_filter(self):
+        """单个滤镜."""
+        result = chain_filters(["scale=1280:720"], "v0")
+        assert result == "[0:v]scale=1280:720[v0]"
+
+    def test_multiple_filters(self):
+        """多个滤镜用逗号连接."""
+        result = chain_filters(["scale=1280:720", "fps=25", "trim=0:5"], "v0")
+        assert "scale=1280:720,fps=25,trim=0:5" in result
+        assert result.startswith("[0:v]")
+        assert result.endswith("[v0]")
+
+    def test_empty_filters(self):
+        """空滤镜列表."""
+        result = chain_filters([], "out")
+        assert result == "[0:v][out]"
+
+    def test_custom_input_label(self):
+        """自定义输入标签."""
+        result = chain_filters(["fps=30"], "v1", input_label="1:v")
+        assert result.startswith("[1:v]")
+        assert result.endswith("[v1]")
+
+    def test_custom_output_label(self):
+        """自定义输出标签."""
+        result = chain_filters(["scale=640:480"], "my_label")
+        assert result.endswith("[my_label]")
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# has_audio
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestHasAudio:
+    """音频判断测试."""
+
+    def test_all_have_audio(self):
+        """全部有音频."""
+        chains = [_make_chain(has_audio=True), _make_chain(has_audio=True)]
+        assert has_audio(chains) is True
+
+    def test_none_have_audio(self):
+        """全部无音频."""
+        chains = [_make_chain(has_audio=False), _make_chain(has_audio=False)]
+        assert has_audio(chains) is False
+
+    def test_partial_audio(self):
+        """部分有音频."""
+        chains = [_make_chain(has_audio=True), _make_chain(has_audio=False)]
+        assert has_audio(chains) is True
+
+    def test_empty_list(self):
+        """空列表."""
+        assert has_audio([]) is False
+
+    def test_single_with_audio(self):
+        """单个有音频."""
+        assert has_audio([_make_chain(has_audio=True)]) is True
+
+    def test_single_without_audio(self):
+        """单个无音频."""
+        assert has_audio([_make_chain(has_audio=False)]) is False
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_clip_filter
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildClipFilter:
+    """单片段滤镜链构建测试."""
+
+    def test_basic_video_clip(self):
+        """基础视频片段."""
+        clip = _mock_clip(duration=5.0, start_time=0.0)
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert chain.clip_id == "c1"
+        assert chain.input_index == 0
+        assert chain.video_label == "v0"
+        assert chain.audio_label == "a0"
+        assert chain.duration == 5.0
+        assert len(chain.filters) >= 5
+
+    def test_contains_scale_filter(self):
+        """包含 scale 滤镜."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert any("scale=1280:720" in f for f in chain.filters)
+
+    def test_contains_pad_filter(self):
+        """包含 pad 滤镜（居中黑边）."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert any("pad=1280:720" in f for f in chain.filters)
+
+    def test_contains_format_filter(self):
+        """包含 format 滤镜（yuv420p）."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert any("format=yuv420p" in f for f in chain.filters)
+
+    def test_contains_fps_filter(self):
+        """包含 fps 滤镜."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 0, 1280, 720, 30)
+        assert any("fps=30" in f for f in chain.filters)
+
+    def test_zero_fps_skipped(self):
+        """fps=0 时跳过 fps 滤镜."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 0, 1280, 720, 0)
+        assert not any(f.startswith("fps=") for f in chain.filters)
+
+    def test_negative_fps_skipped(self):
+        """负 fps 跳过."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 0, 1280, 720, -1)
+        assert not any(f.startswith("fps=") for f in chain.filters)
+
+    def test_start_time_offset(self):
+        """有 start_time 时 setpts 带偏移."""
+        clip = _mock_clip(start_time=2.0)
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert any("PTS-STARTPTS+2.0/TB" in f for f in chain.filters)
+
+    def test_zero_start_time_no_offset(self):
+        """start_time=0 时无偏移."""
+        clip = _mock_clip(start_time=0.0)
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert any("setpts=PTS-STARTPTS" in f for f in chain.filters)
+        # 不含 +N/TB 偏移
+        setpts_filters = [f for f in chain.filters if f.startswith("setpts=")]
+        # 第一个 setpts 是重置的（不含偏移），trim 后还有一个
+        assert len(setpts_filters) >= 1
+
+    def test_contains_trim_filter(self):
+        """包含 trim 滤镜."""
+        clip = _mock_clip(duration=5.0)
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert any("trim=0:5.0" in f for f in chain.filters)
+
+    def test_negative_duration_uses_default(self):
+        """duration<=0 时使用默认时长."""
+        clip = _mock_clip(duration=0.0)
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert chain.duration == DEFAULT_CLIP_DURATION
+        assert any(f"trim=0:{DEFAULT_CLIP_DURATION}" in f for f in chain.filters)
+
+    def test_title_clip_no_audio(self):
+        """title 类型片段无音频."""
+        clip = _mock_clip(clip_type="title")
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert chain.audio_label is None
+
+    def test_subtitle_clip_no_audio(self):
+        """subtitle 类型片段无音频."""
+        clip = _mock_clip(clip_type="subtitle")
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert chain.audio_label is None
+
+    def test_video_clip_has_audio(self):
+        """video 类型片段有音频."""
+        clip = _mock_clip(clip_type="video")
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        assert chain.audio_label == "a0"
+
+    def test_image_clip_has_audio(self):
+        """image 类型默认有音频标签（实际无音流由调用方判断）."""
+        clip = _mock_clip(clip_type="image")
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        # 只有 title/subtitle 被排除
+        assert chain.audio_label is not None
+
+    def test_input_index_matches_label(self):
+        """input_index 对应标签编号."""
+        clip = _mock_clip()
+        chain = build_clip_filter(clip, 3, 1280, 720, 25)
+        assert chain.input_index == 3
+        assert chain.video_label == "v3"
+        assert chain.audio_label == "a3"
+
+    def test_filter_order(self):
+        """滤镜顺序：scale → pad → format → fps → setpts → trim."""
+        clip = _mock_clip(duration=5.0, start_time=1.0)
+        chain = build_clip_filter(clip, 0, 1280, 720, 25)
+        filter_names = [f.split("=")[0] for f in chain.filters]
+        # scale 在 pad 前
+        assert filter_names.index("scale") < filter_names.index("pad")
+        # pad 在 format 前
+        assert filter_names.index("pad") < filter_names.index("format")
+        # format 在 fps 前
+        assert filter_names.index("format") < filter_names.index("fps")
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_concat_filter
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildConcatFilter:
+    """concat 滤镜构建测试."""
+
+    def test_empty_returns_empty(self):
+        """空列表返回空."""
+        result, duration = build_concat_filter([])
+        assert result == ""
+        assert duration == 0.0
+
+    def test_single_clip(self):
+        """单个片段."""
+        chain = _make_chain(clip_id="c1", input_index=0, duration=3.0)
+        result, total = build_concat_filter([chain])
+        assert "[0:v]" in result
+        assert "concat=n=1:v=1:a=0" in result
+        assert "[outv]" in result
+        assert total == 3.0
+
+    def test_two_clips(self):
+        """两个片段 concat."""
+        chains = [
+            _make_chain(clip_id="c1", input_index=0, duration=3.0),
+            _make_chain(clip_id="c2", input_index=1, duration=2.0),
+        ]
+        result, total = build_concat_filter(chains)
+        assert "[0:v]" in result
+        assert "[1:v]" in result
+        assert "concat=n=2:v=1:a=0[outv]" in result
+        assert total == 5.0
+
+    def test_three_clips(self):
+        """三个片段."""
+        chains = [
+            _make_chain(clip_id="c1", input_index=0, duration=2.0),
+            _make_chain(clip_id="c2", input_index=1, duration=3.0),
+            _make_chain(clip_id="c3", input_index=2, duration=1.0),
+        ]
+        result, total = build_concat_filter(chains)
+        assert "concat=n=3:v=1:a=0[outv]" in result
+        assert total == 6.0
+
+    def test_total_duration_sum(self):
+        """总时长 = 各片段时长之和."""
+        chains = [
+            _make_chain(duration=1.5),
+            _make_chain(duration=2.5),
+            _make_chain(duration=3.0),
+        ]
+        _, total = build_concat_filter(chains)
+        assert abs(total - 7.0) < 0.001
+
+    def test_audio_concat_with_audio(self):
+        """有音频时包含音频 concat."""
+        chains = [
+            _make_chain(input_index=0, has_audio=True),
+            _make_chain(input_index=1, has_audio=True),
+        ]
+        result, _ = build_concat_filter(chains)
+        assert "[outa]" in result
+        assert "concat=n=2:v=0:a=1[outa]" in result
+
+    def test_audio_normalization(self):
+        """音频经过 aformat 归一化."""
+        chains = [_make_chain(input_index=0, has_audio=True)]
+        result, _ = build_concat_filter(chains)
+        assert "aformat=sample_rates=48000" in result
+        assert "channel_layouts=stereo" in result
+        assert "sample_fmts=fltp" in result
+
+    def test_no_audio_concat(self):
+        """无音频时不生成音频 concat."""
+        chains = [
+            _make_chain(input_index=0, has_audio=False),
+            _make_chain(input_index=1, has_audio=False),
+        ]
+        result, _ = build_concat_filter(chains)
+        assert "[outa]" not in result
+        assert "aformat" not in result
+
+    def test_partial_audio_only_includes_audio_chains(self):
+        """部分有音频时，只对有音频的片段做 concat."""
+        chains = [
+            _make_chain(input_index=0, has_audio=True),
+            _make_chain(input_index=1, has_audio=False),
+            _make_chain(input_index=2, has_audio=True),
+        ]
+        result, _ = build_concat_filter(chains)
+        # 音频 concat 只有 2 个输入
+        assert "concat=n=2:v=0:a=1[outa]" in result
+
+    def test_video_labels_correct(self):
+        """视频标签正确."""
+        chains = [
+            _make_chain(clip_id="a", input_index=0, duration=1.0),
+            _make_chain(clip_id="b", input_index=1, duration=1.0),
+        ]
+        result, _ = build_concat_filter(chains)
+        assert "[v0]" in result
+        assert "[v1]" in result
+
+    def test_filter_chain_applied_per_clip(self):
+        """每个片段都有独立的滤镜链."""
+        chains = [
+            _make_chain(input_index=0, filters=["scale=1280:720", "fps=25"]),
+            _make_chain(input_index=1, filters=["scale=1280:720", "fps=25"]),
+        ]
+        result, _ = build_concat_filter(chains)
+        # 两个片段都有滤镜处理
+        assert result.count("scale=1280:720") == 2
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_xfade_filter
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildXfadeFilter:
+    """xfade 转场滤镜构建测试."""
+
+    def test_empty_returns_empty(self):
+        """空列表返回空."""
+        result, duration = build_xfade_filter([], 0.5, [])
+        assert result == ""
+        assert duration == 0.0
+
+    def test_single_clip_copy(self):
+        """单个片段用 copy 直接输出."""
+        chain = _make_chain(clip_id="c1", input_index=0, duration=3.0)
+        result, total = build_xfade_filter([chain], 0.5, [])
+        assert "copy[outv]" in result
+        assert total == 3.0
+
+    def test_two_clips_fade_transition(self):
+        """两个片段 + fade 转场."""
+        chains = [
+            _make_chain(input_index=0, duration=3.0),
+            _make_chain(input_index=1, duration=2.0),
+        ]
+        result, total = build_xfade_filter(chains, 0.5, ["cut", "fade"])
+        assert "xfade=transition=fade" in result
+        assert "duration=0.5" in result
+        assert "[outv]" in result
+        # 总时长 = 3 + 2 - 0.5 = 4.5
+        assert abs(total - 4.5) < 0.001
+
+    def test_three_clips_with_transitions(self):
+        """三个片段 + 多个转场."""
+        chains = [
+            _make_chain(input_index=0, duration=3.0),
+            _make_chain(input_index=1, duration=2.0),
+            _make_chain(input_index=2, duration=4.0),
+        ]
+        result, total = build_xfade_filter(chains, 0.5, ["cut", "fade", "slideleft"])
+        # 两个 xfade 转场
+        assert result.count("xfade=") == 2
+        assert "xf1" in result  # 中间标签
+        # 总时长 = 3+2+4 - 0.5*2 = 8.0
+        assert abs(total - 8.0) < 0.001
+
+    def test_offset_calculation(self):
+        """转场 offset 计算正确."""
+        chains = [
+            _make_chain(input_index=0, duration=5.0),
+            _make_chain(input_index=1, duration=3.0),
+        ]
+        result, _ = build_xfade_filter(chains, 1.0, ["cut", "fade"])
+        # offset = 5.0 - 1.0*1 = 4.0
+        assert "offset=4.000" in result
+
+    def test_offset_never_negative(self):
+        """offset 不为负."""
+        chains = [
+            _make_chain(input_index=0, duration=0.3),
+            _make_chain(input_index=1, duration=0.3),
+        ]
+        result, _ = build_xfade_filter(chains, 1.0, ["cut", "fade"])
+        # offset = max(0, 0.3 - 1.0) = 0
+        assert "offset=0.000" in result
+
+    def test_transition_slide_left(self):
+        """slideleft 转场."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=2.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "slide_left"])
+        assert "xfade=transition=slideleft" in result
+
+    def test_transition_slide_right(self):
+        """slideright 转场."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=2.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "slide_right"])
+        assert "xfade=transition=slideright" in result
+
+    def test_transition_dissolve(self):
+        """dissolve 转场."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=2.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "dissolve"])
+        assert "xfade=transition=dissolve" in result
+
+    def test_unknown_transition_defaults_to_fade(self):
+        """未知转场默认 fade."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=2.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "unknown_transition"])
+        assert "xfade=transition=fade" in result
+
+    def test_total_duration_minus_overlap(self):
+        """总时长 = sum - transition_duration * (n-1)."""
+        chains = [
+            _make_chain(duration=10.0),
+            _make_chain(duration=10.0),
+            _make_chain(duration=10.0),
+        ]
+        _, total = build_xfade_filter(chains, 1.0, ["cut", "fade", "wipe"])
+        # 30 - 2 = 28
+        assert abs(total - 28.0) < 0.001
+
+    def test_total_duration_never_negative(self):
+        """总时长不为负."""
+        chains = [
+            _make_chain(duration=0.1),
+            _make_chain(duration=0.1),
+        ]
+        _, total = build_xfade_filter(chains, 10.0, ["cut", "fade"])
+        assert total >= 0.0
+
+    def test_audio_with_xfade_path(self):
+        """xfade 路径下音频也做 concat."""
+        chains = [
+            _make_chain(input_index=0, has_audio=True, duration=2.0),
+            _make_chain(input_index=1, has_audio=True, duration=3.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "fade"])
+        assert "[outa]" in result
+        assert "aformat=" in result
+
+    def test_single_xfade_no_audio_processing(self):
+        """单片段 xfade 路径不处理音频（与原实现一致）."""
+        chain = _make_chain(input_index=0, has_audio=True, duration=3.0)
+        result, _ = build_xfade_filter([chain], 0.5, [])
+        # 单片段 xfade 只有视频 copy，不处理音频
+        assert "copy[outv]" in result
+        assert "[outa]" not in result
+        assert "acopy" not in result
+
+    def test_no_audio_xfade(self):
+        """无音频时不生成 [outa]."""
+        chains = [
+            _make_chain(input_index=0, has_audio=False, duration=2.0),
+            _make_chain(input_index=1, has_audio=False, duration=2.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "fade"])
+        assert "[outa]" not in result
+
+    def test_intermediate_labels(self):
+        """多片段时有中间 xf 标签."""
+        chains = [
+            _make_chain(input_index=0, duration=1.0),
+            _make_chain(input_index=1, duration=1.0),
+            _make_chain(input_index=2, duration=1.0),
+            _make_chain(input_index=3, duration=1.0),
+        ]
+        result, _ = build_xfade_filter(chains, 0.3, ["cut", "fade", "wipe", "dissolve"])
+        assert "[xf1]" in result
+        assert "[xf2]" in result
+        assert "[outv]" in result
+
+    def test_transitions_shorter_than_clips(self):
+        """transitions 列表比片段短时，后续用默认值."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=2.0),
+            _make_chain(input_index=2, duration=2.0),
+        ]
+        # 只给一个转场（索引1有效，索引2越界）
+        result, _ = build_xfade_filter(chains, 0.5, ["cut", "fade"])
+        # 第2个转场（索引2）未知 → 默认 fade
+        assert result.count("xfade=transition=fade") == 2
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_filter_complex
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildFilterComplex:
+    """完整 filter_complex 构建（策略选择）测试."""
+
+    def test_empty_returns_empty(self):
+        """空列表返回空."""
+        result, duration = build_filter_complex([], 1280, 720, 0.5, [])
+        assert result == ""
+        assert duration == 0.0
+
+    def test_single_clip_chain_mode(self):
+        """单片段走单链模式."""
+        chain = _make_chain(input_index=0, duration=3.0, has_audio=True)
+        result, total = build_filter_complex([chain], 1280, 720, 0.5, [])
+        assert "[0:v]" in result
+        assert "[0:a]" in result
+        assert total == 3.0
+
+    def test_single_clip_no_audio(self):
+        """单片段无音频."""
+        chain = _make_chain(input_index=0, duration=3.0, has_audio=False)
+        result, _ = build_filter_complex([chain], 1280, 720, 0.5, [])
+        assert "[0:a]" not in result
+
+    def test_multiple_clips_all_cut_uses_concat(self):
+        """多片段 + 全 cut → 走 concat（高效模式）."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=3.0),
+        ]
+        result, total = build_filter_complex(chains, 1280, 720, 0.5, ["cut", "cut"])
+        # concat 模式
+        assert "concat=n=2:v=1:a=0" in result
+        assert "xfade" not in result
+        assert total == 5.0
+
+    def test_multiple_clips_with_transition_uses_xfade(self):
+        """多片段 + 有转场 → 走 xfade."""
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=3.0),
+        ]
+        result, total = build_filter_complex(chains, 1280, 720, 0.5, ["cut", "fade"])
+        assert "xfade=" in result
+        assert abs(total - 4.5) < 0.001
+
+    def test_transition_effect_enum_value(self):
+        """使用 TransitionEffect 枚举值也能正确判断."""
+        from packages.domain.template_clip_config import TransitionEffect
+
+        chains = [
+            _make_chain(input_index=0, duration=2.0),
+            _make_chain(input_index=1, duration=2.0),
+        ]
+        # 传 TransitionEffect.CUT（不是字符串 "cut"）
+        result, _ = build_filter_complex(
+            chains,
+            1280,
+            720,
+            0.5,
+            [TransitionEffect.CUT, TransitionEffect.CUT],
+        )
+        # 都是 cut → 走 concat
+        assert "concat=n=2:v=1:a=0" in result
+
+    def test_mixed_cut_and_transition(self):
+        """混合 cut 和转场 → 走 xfade."""
+        chains = [
+            _make_chain(input_index=0, duration=1.0),
+            _make_chain(input_index=1, duration=1.0),
+            _make_chain(input_index=2, duration=1.0),
+        ]
+        result, total = build_filter_complex(chains, 1280, 720, 0.5, ["cut", "fade", "cut"])
+        # 只要有一个非 cut 转场就走 xfade
+        assert "xfade=" in result
+        assert abs(total - 2.0) < 0.001
@@ -0,0 +1,579 @@
+"""xfade_builder 单测.
+
+domain 层 XFade 转场滤镜构建纯逻辑模块，0 FFmpeg 依赖。
+覆盖：转场名称映射、滤镜链串联、xfade 滤镜链构建（含 duration 钳制）。
+"""
+
+from __future__ import annotations
+
+from unittest.mock import MagicMock
+
+import pytest
+
+from packages.domain.xfade_builder import (
+    DEFAULT_TRANSITION_DURATION,
+    SUPPORTED_TRANSITIONS,
+    XFADE_TRANSITION_MAP,
+    XFade_TRANSITION_NAMES,
+    build_xfade_filter_chain,
+    chain_filters,
+    resolve_xfade_transition,
+)
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# 常量测试
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestConstants:
+    """常量测试."""
+
+    def test_default_duration(self):
+        """默认转场时长 0.5s."""
+        assert DEFAULT_TRANSITION_DURATION == 0.5
+
+    def test_transition_map_not_empty(self):
+        """转场映射非空."""
+        assert len(XFADE_TRANSITION_MAP) > 10
+
+    def test_supported_transitions(self):
+        """支持的转场数量与映射键一致."""
+        assert len(SUPPORTED_TRANSITIONS) == len(XFADE_TRANSITION_MAP)
+
+    def test_output_names_subset(self):
+        """输出名称是映射值的集合."""
+        assert XFade_TRANSITION_NAMES == set(XFADE_TRANSITION_MAP.values())
+
+    def test_fade_in_map(self):
+        """fade 是基础转场."""
+        assert "fade" in XFADE_TRANSITION_MAP
+        assert XFADE_TRANSITION_MAP["fade"] == "fade"
+
+    def test_dissolve_aliases(self):
+        """dissolve 有多个别名."""
+        assert XFADE_TRANSITION_MAP["dissolve"] == "dissolve"
+        assert XFADE_TRANSITION_MAP["crossfade"] == "dissolve"
+        assert XFADE_TRANSITION_MAP["crossdissolve"] == "dissolve"
+
+    def test_slide_directions(self):
+        """4 方向滑动都有映射."""
+        assert XFADE_TRANSITION_MAP["slideleft"] == "slideleft"
+        assert XFADE_TRANSITION_MAP["slideright"] == "slideright"
+        assert XFADE_TRANSITION_MAP["slideup"] == "slideup"
+        assert XFADE_TRANSITION_MAP["slidedown"] == "slidedown"
+
+    def test_slide_underscore_aliases(self):
+        """下划线别名也支持."""
+        assert XFADE_TRANSITION_MAP["slide_left"] == "slideleft"
+        assert XFADE_TRANSITION_MAP["slide_right"] == "slideright"
+        assert XFADE_TRANSITION_MAP["slide_up"] == "slideup"
+        assert XFADE_TRANSITION_MAP["slide_down"] == "slidedown"
+
+    def test_slide_default_direction(self):
+        """slide 默认向左滑."""
+        assert XFADE_TRANSITION_MAP["slide"] == "slideleft"
+
+    def test_wipe_directions(self):
+        """4 方向擦除."""
+        assert XFADE_TRANSITION_MAP["wipeleft"] == "wipeleft"
+        assert XFADE_TRANSITION_MAP["wiperight"] == "wiperight"
+        assert XFADE_TRANSITION_MAP["wipeup"] == "wipeup"
+        assert XFADE_TRANSITION_MAP["wipedown"] == "wipedown"
+
+    def test_wipe_default(self):
+        """wipe 默认向左擦."""
+        assert XFADE_TRANSITION_MAP["wipe"] == "wipeleft"
+
+    def test_zoom(self):
+        """缩放转场."""
+        assert XFADE_TRANSITION_MAP["zoom"] == "zoomin"
+        assert XFADE_TRANSITION_MAP["zoomin"] == "zoomin"
+        assert XFADE_TRANSITION_MAP["zoomout"] == "zoomout"
+
+    def test_circle_rect(self):
+        """圆形/矩形裁剪."""
+        assert XFADE_TRANSITION_MAP["circle"] == "circlecrop"
+        assert XFADE_TRANSITION_MAP["circlecrop"] == "circlecrop"
+        assert XFADE_TRANSITION_MAP["rect"] == "rectcrop"
+        assert XFADE_TRANSITION_MAP["rectcrop"] == "rectcrop"
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# chain_filters
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestChainFilters:
+    """滤镜链串联测试."""
+
+    def test_single_filter(self):
+        """单个滤镜."""
+        result = chain_filters(["scale=1280:720"], "v0")
+        assert result == "[0:v]scale=1280:720[v0]"
+
+    def test_multiple_filters(self):
+        """多个滤镜用逗号连接."""
+        result = chain_filters(["scale=1280:720", "fps=25", "format=yuv420p"], "out")
+        assert "scale=1280:720,fps=25,format=yuv420p" in result
+
+    def test_empty_filters(self):
+        """空滤镜列表."""
+        result = chain_filters([], "out")
+        assert result == "[0:v][out]"
+
+    def test_custom_input_label(self):
+        """自定义输入标签."""
+        result = chain_filters(["fps=30"], "v1", input_label="2:v")
+        assert result.startswith("[2:v]")
+
+    def test_custom_output_label(self):
+        """自定义输出标签."""
+        result = chain_filters(["scale=640:480"], "my_output")
+        assert result.endswith("[my_output]")
+
+    def test_preserves_filter_order(self):
+        """保持滤镜顺序."""
+        filters = ["a", "b", "c", "d"]
+        result = chain_filters(filters, "out")
+        idx_a = result.index("a")
+        idx_b = result.index("b")
+        idx_c = result.index("c")
+        idx_d = result.index("d")
+        assert idx_a < idx_b < idx_c < idx_d
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# resolve_xfade_transition
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestResolveXfadeTransition:
+    """转场名称解析测试."""
+
+    def test_fade(self):
+        """fade → fade."""
+        assert resolve_xfade_transition("fade") == "fade"
+
+    def test_dissolve(self):
+        """dissolve → dissolve."""
+        assert resolve_xfade_transition("dissolve") == "dissolve"
+
+    def test_slide_left_alias(self):
+        """slide_left 别名."""
+        assert resolve_xfade_transition("slide_left") == "slideleft"
+
+    def test_slide_default(self):
+        """slide 默认向左."""
+        assert resolve_xfade_transition("slide") == "slideleft"
+
+    def test_zoom_default(self):
+        """zoom 默认 zoomin."""
+        assert resolve_xfade_transition("zoom") == "zoomin"
+
+    def test_wipe_default(self):
+        """wipe 默认向左擦."""
+        assert resolve_xfade_transition("wipe") == "wipeleft"
+
+    def test_unknown_falls_back_to_fade(self):
+        """未知转场回退到 fade."""
+        assert resolve_xfade_transition("unknown_effect") == "fade"
+
+    def test_empty_string_fades(self):
+        """空字符串回退到 fade."""
+        assert resolve_xfade_transition("") == "fade"
+
+    def test_enum_value(self):
+        """支持枚举（有 .value 属性）."""
+        mock_enum = MagicMock()
+        mock_enum.value = "dissolve"
+        assert resolve_xfade_transition(mock_enum) == "dissolve"
+
+    def test_enum_unknown_value_fades(self):
+        """枚举值未知时回退到 fade."""
+        mock_enum = MagicMock()
+        mock_enum.value = "not_a_real_effect"
+        assert resolve_xfade_transition(mock_enum) == "fade"
+
+    def test_circle_alias(self):
+        """circle 别名."""
+        assert resolve_xfade_transition("circle") == "circlecrop"
+
+    def test_rect_alias(self):
+        """rect 别名."""
+        assert resolve_xfade_transition("rect") == "rectcrop"
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_xfade_filter_chain — 基础结构
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildXfadeFilterChainBasic:
+    """xfade 滤镜链基础结构测试."""
+
+    def test_empty_clips(self):
+        """空片段返回空."""
+        result, duration = build_xfade_filter_chain([], [], [])
+        assert result == ""
+        assert duration == 0.0
+
+    def test_single_clip_copy(self):
+        """单个片段用 copy."""
+        result, duration = build_xfade_filter_chain([5.0], ["v0"], [])
+        assert "[v0]copy[outv]" in result
+        assert duration == 5.0
+
+    def test_two_clips_fade(self):
+        """两个片段 + fade 转场."""
+        result, total = build_xfade_filter_chain([5.0, 3.0], ["v0", "v1"], ["cut", "fade"])
+        assert "xfade=transition=fade" in result
+        assert ":duration=0.500" in result
+        assert "[outv]" in result
+        # 总时长 = 5 + 3 - 0.5 = 7.5
+        assert abs(total - 7.5) < 0.01
+
+    def test_three_clips(self):
+        """三个片段有 2 个 xfade."""
+        result, total = build_xfade_filter_chain(
+            [4.0, 3.0, 5.0],
+            ["v0", "v1", "v2"],
+            ["cut", "fade", "dissolve"],
+        )
+        assert result.count("xfade=") == 2
+        assert "xf1" in result  # 中间标签
+        # 总时长 = 4 + 3 + 5 - 0.5*2 = 11.0
+        assert abs(total - 11.0) < 0.01
+
+    def test_output_label_custom(self):
+        """自定义输出标签."""
+        result, _ = build_xfade_filter_chain(
+            [5.0, 3.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            output_label="final",
+        )
+        assert result.endswith("[final]")
+        assert "[outv]" not in result
+
+    def test_custom_transition_duration(self):
+        """自定义转场时长."""
+        result, total = build_xfade_filter_chain(
+            [5.0, 3.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=1.0,
+        )
+        assert ":duration=1.000" in result
+        assert abs(total - 7.0) < 0.01  # 5+3-1 = 7
+
+    def test_intermediate_labels(self):
+        """多片段使用中间 xf 标签."""
+        result, _ = build_xfade_filter_chain(
+            [1.0, 1.0, 1.0, 1.0, 1.0],
+            ["v0", "v1", "v2", "v3", "v4"],
+            ["cut"] * 5,
+        )
+        # 5 个片段 = 4 个 xfade，中间标签 xf1, xf2, xf3
+        assert "[xf1]" in result
+        assert "[xf2]" in result
+        assert "[xf3]" in result
+
+    def test_video_labels_used(self):
+        """使用传入的视频标签."""
+        result, _ = build_xfade_filter_chain(
+            [2.0, 2.0],
+            ["clip_a", "clip_b"],
+            ["cut", "fade"],
+        )
+        assert "[clip_a]" in result
+        assert "[clip_b]" in result
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_xfade_filter_chain — offset 计算
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildXfadeFilterChainOffset:
+    """xfade offset 计算测试."""
+
+    def test_two_clips_offset(self):
+        """两片段 offset = dur0 - td."""
+        result, _ = build_xfade_filter_chain(
+            [10.0, 5.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=1.0,
+        )
+        # offset = 10 - 1*1 = 9
+        assert ":offset=9.000" in result
+
+    def test_three_clips_second_offset(self):
+        """三片段第二个 offset."""
+        result, _ = build_xfade_filter_chain(
+            [5.0, 4.0, 3.0],
+            ["v0", "v1", "v2"],
+            ["cut", "fade", "fade"],
+            transition_duration=0.5,
+        )
+        # 第一个 xfade offset = 5 - 0.5*1 = 4.5
+        # 第二个：cumulative = 5+4 = 9, offset = 9 - 0.5*2 = 8
+        assert ":offset=4.500" in result
+        assert ":offset=8.000" in result
+
+    def test_offset_never_negative(self):
+        """offset 不为负."""
+        result, _ = build_xfade_filter_chain(
+            [0.1, 0.1],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=1.0,
+        )
+        # 找 offset 的值
+        import re
+
+        offsets = re.findall(r"offset=([\d.]+)", result)
+        for off in offsets:
+            assert float(off) >= 0.0
+
+    def test_short_first_clip_clamps_td(self):
+        """第一个片段很短时，转场时长被钳制."""
+        result, _ = build_xfade_filter_chain(
+            [0.3, 2.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=1.0,
+        )
+        # 第一片段只有 0.3s，offset ≈ 0, available ≈ 0.3, td 被钳制
+        import re
+
+        durations = re.findall(r"duration=([\d.]+)", result)
+        # 第一个 duration 是 xfade 的 duration
+        xfade_dur = float(durations[0])
+        assert xfade_dur <= 0.3  # 不能超过第一个片段时长
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_xfade_filter_chain — duration 钳制（防 exit 234）
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildXfadeFilterChainClamping:
+    """duration 钳制逻辑测试（防 FFmpeg exit 234）."""
+
+    def test_td_not_exceed_first_input(self):
+        """转场时长不超过第一个输入的可用时长."""
+        # 第一个片段 1s，转场 2s → 被钳制
+        result, total = build_xfade_filter_chain(
+            [1.0, 3.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=2.0,
+        )
+        import re
+
+        durations = re.findall(r"xfade=transition=fade:duration=([\d.]+)", result)
+        assert float(durations[0]) <= 1.0
+        # 总时长不会比 1+3 = 4 还大（钳制后 td < 2）
+        assert total < 4.0
+
+    def test_td_not_exceed_second_input(self):
+        """转场时长不超过第二个片段时长."""
+        result, _ = build_xfade_filter_chain(
+            [3.0, 0.2],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=1.0,
+        )
+        import re
+
+        durations = re.findall(r"xfade=transition=fade:duration=([\d.]+)", result)
+        assert float(durations[0]) <= 0.2
+
+    def test_td_minimum_1ms(self):
+        """td 至少 1ms."""
+        result, _ = build_xfade_filter_chain(
+            [0.0001, 0.0001],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=0.0,
+        )
+        import re
+
+        durations = re.findall(r"xfade=transition=fade:duration=([\d.]+)", result)
+        if durations:
+            assert float(durations[0]) >= 0.001
+
+    def test_many_short_clips(self):
+        """多个极短片段."""
+        n = 5
+        durations = [0.2] * n
+        labels = [f"v{i}" for i in range(n)]
+        result, total = build_xfade_filter_chain(
+            durations,
+            labels,
+            ["cut"] * n,
+            transition_duration=0.5,
+        )
+        # 4 个转场
+        assert result.count("xfade=") == 4
+        # 总时长合理：sum = 1.0，减去被钳制的转场
+        assert total > 0
+        assert total <= sum(durations)
+
+    def test_second_xfade_first_input_is_accumulated(self):
+        """第二个 xfade 的第一个输入时长是累积值（考虑之前的转场扣减）."""
+        # 三个片段，转场比较长，验证第二步钳制
+        result, total = build_xfade_filter_chain(
+            [2.0, 2.0, 2.0],
+            ["v0", "v1", "v2"],
+            ["cut", "fade", "fade"],
+            transition_duration=1.0,
+        )
+        # 第一个 xfade: first_input_dur = 2.0, td = min(1.0, 2.0-offset)
+        # offset = 2 - 1*1 = 1.0, available = 2.0 - 1.0 = 1.0, td = 1.0
+        # 第二个 xfade: first_input_dur = (2+2) - 1.0 = 3.0（累积 - 已用转场）
+        # offset = 4 - 1*2 = 2.0, available = 3.0 - 2.0 = 1.0, td = min(1.0, 1.0, 2.0) = 1.0
+        import re
+
+        dur_match = re.findall(r":duration=([\d.]+)", result)
+        # 两个 xfade，每个 duration 都是 1.0（正常情况）
+        assert len(dur_match) == 2
+        assert float(dur_match[0]) == 1.0
+        assert float(dur_match[1]) == 1.0
+
+    def test_total_duration_positive(self):
+        """总时长不为负."""
+        _, total = build_xfade_filter_chain(
+            [0.1, 0.1],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=10.0,
+        )
+        assert total >= 0.0
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_xfade_filter_chain — 转场类型
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildXfadeFilterChainTransitions:
+    """不同转场类型测试."""
+
+    def test_slideleft_transition(self):
+        """slideleft 转场."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "slideleft"])
+        assert "xfade=transition=slideleft" in result
+
+    def test_slide_left_alias_resolved(self):
+        """slide_left 别名解析正确."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "slide_left"])
+        assert "xfade=transition=slideleft" in result
+
+    def test_dissolve_transition(self):
+        """dissolve 转场."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "dissolve"])
+        assert "xfade=transition=dissolve" in result
+
+    def test_zoom_transition(self):
+        """zoom 转场 → zoomin."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "zoom"])
+        assert "xfade=transition=zoomin" in result
+
+    def test_wipe_transition(self):
+        """wipe 转场."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "wipeup"])
+        assert "xfade=transition=wipeup" in result
+
+    def test_unknown_transition_fade(self):
+        """未知转场回退到 fade."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "nonexistent"])
+        assert "xfade=transition=fade" in result
+
+    def test_cut_resolved_as_fade(self):
+        """cut 也回退到 fade（调用方应对 cut 做特殊处理，但这里也能工作）."""
+        result, _ = build_xfade_filter_chain([3.0, 2.0], ["v0", "v1"], ["cut", "cut"])
+        # cut 不在映射里，回退到 fade
+        assert "xfade=transition=fade" in result
+
+    def test_transitions_shorter_than_clips(self):
+        """transitions 比片段少时，超出部分用 cut/fade."""
+        result, _ = build_xfade_filter_chain(
+            [1.0, 1.0, 1.0, 1.0],
+            ["v0", "v1", "v2", "v3"],
+            ["cut", "fade"],  # 只有 2 个转场
+        )
+        # 4 个片段 = 3 个 xfade，第三个用默认（cut→fade）
+        assert result.count("xfade=") == 3
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_xfade_filter_chain — 总时长验证
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildXfadeFilterChainTotalDuration:
+    """总时长计算验证."""
+
+    def test_two_equal_clips_default_td(self):
+        """两个等长片段 + 默认 0.5s 转场."""
+        _, total = build_xfade_filter_chain(
+            [5.0, 5.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+        )
+        assert abs(total - 9.5) < 0.01  # 5+5-0.5
+
+    def test_three_clips_two_transitions(self):
+        """三个片段两个转场."""
+        _, total = build_xfade_filter_chain(
+            [3.0, 4.0, 3.0],
+            ["v0", "v1", "v2"],
+            ["cut"] * 3,
+            transition_duration=0.5,
+        )
+        # 10 - 1.0 = 9.0
+        assert abs(total - 9.0) < 0.01
+
+    def test_single_clip_no_transition_loss(self):
+        """单个片段无转场扣减."""
+        _, total = build_xfade_filter_chain([10.0], ["v0"], [])
+        assert total == 10.0
+
+    def test_zero_duration_clips(self):
+        """0 时长片段不崩溃."""
+        result, total = build_xfade_filter_chain(
+            [0.0, 0.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+        )
+        assert total >= 0.0
+        assert "xfade=" in result  # 仍然生成转场（td 被钳制到最小）
+
+    def test_very_long_transition_clamped(self):
+        """极长转场被钳制，总时长仍为正."""
+        _, total = build_xfade_filter_chain(
+            [2.0, 2.0],
+            ["v0", "v1"],
+            ["cut", "fade"],
+            transition_duration=100.0,
+        )
+        # 总时长 > 0
+        assert total > 0.0
+        # 且 < sum(durations) = 4（因为被钳制但还有重叠）
+        assert total < 4.0
+
+    def test_many_clips_linear_total(self):
+        """多片段总时长近似线性增长."""
+        n = 10
+        durations = [1.0] * n
+        labels = [f"v{i}" for i in range(n)]
+        _, total = build_xfade_filter_chain(
+            durations,
+            labels,
+            ["cut"] * n,
+            transition_duration=0.1,
+        )
+        # 10 - 9*0.1 = 9.1
+        assert abs(total - 9.1) < 0.05
@@ -0,0 +1,658 @@
+"""BGM 混音纯逻辑单元测试."""
+
+from __future__ import annotations
+
+import pytest
+from video_processing.bgm_mixer_pure import (
+    BGMPureConfig,
+    build_bgm_filter_chain,
+    build_sidechain_mix_filter,
+    build_simple_mix_filter,
+    calculate_fade_out_start,
+    calculate_loop_count,
+    calculate_sidechain_ratio,
+    estimate_bgm_processing_duration,
+    normalize_bgm_config,
+    should_loop_bgm,
+    validate_bgm_config,
+)
+
+# ─────────────────────────────────────────────────────────────────────────────
+# should_loop_bgm 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestShouldLoopBGM:
+    """BGM 循环判断测试."""
+
+    def test_need_loop_when_much_shorter(self):
+        """BGM 远短于目标时长，需要循环."""
+        assert should_loop_bgm(10, 100, True) is True
+
+    def test_no_loop_when_long_enough(self):
+        """BGM 够长，不需要循环."""
+        assert should_loop_bgm(100, 100, True) is False
+
+    def test_no_loop_when_just_slightly_shorter(self):
+        """BGM 只差一点点（>90%），不循环."""
+        assert should_loop_bgm(95, 100, True) is False
+
+    def test_threshold_90_percent(self):
+        """刚好 90% 阈值，不循环（<90% 才循环）."""
+        assert should_loop_bgm(90, 100, True) is False
+
+    def test_just_below_threshold(self):
+        """略低于 90%，需要循环."""
+        assert should_loop_bgm(89, 100, True) is True
+
+    def test_loop_disabled(self):
+        """禁用循环，即使 BGM 很短也不循环."""
+        assert should_loop_bgm(10, 100, False) is False
+
+    def test_zero_bgm_duration(self):
+        """BGM 时长为 0，不循环."""
+        assert should_loop_bgm(0, 100, True) is False
+
+    def test_negative_bgm_duration(self):
+        """BGM 时长为负，不循环."""
+        assert should_loop_bgm(-5, 100, True) is False
+
+    def test_zero_target_duration(self):
+        """目标时长为 0，不循环."""
+        assert should_loop_bgm(10, 0, True) is False
+
+    def test_negative_target_duration(self):
+        """目标时长为负，不循环."""
+        assert should_loop_bgm(10, -10, True) is False
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# calculate_loop_count 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCalculateLoopCount:
+    """循环次数计算测试."""
+
+    def test_exact_multiple(self):
+        """刚好整数倍."""
+        # 100/10 = 10, +2 = 12
+        assert calculate_loop_count(10, 100) == 12
+
+    def test_not_exact_multiple(self):
+        """不是整数倍."""
+        # 100/30 = 3, +2 = 5
+        assert calculate_loop_count(30, 100) == 5
+
+    def test_bgm_longer_than_target(self):
+        """BGM 比目标长，至少 1 次."""
+        assert calculate_loop_count(200, 100) == 1
+
+    def test_zero_bgm_duration(self):
+        """BGM 时长为 0，返回 1."""
+        assert calculate_loop_count(0, 100) == 1
+
+    def test_negative_bgm_duration(self):
+        """BGM 时长为负，返回 1."""
+        assert calculate_loop_count(-5, 100) == 1
+
+    def test_zero_target_duration(self):
+        """目标时长为 0，返回 1."""
+        assert calculate_loop_count(10, 0) == 1
+
+    def test_negative_target_duration(self):
+        """目标时长为负，返回 1."""
+        assert calculate_loop_count(10, -10) == 1
+
+    def test_very_short_bgm(self):
+        """非常短的 BGM，循环次数多."""
+        # 100/1 = 100, +2 = 102
+        assert calculate_loop_count(1, 100) == 102
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# build_bgm_filter_chain 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildBGMFilterChain:
+    """BGM 预处理滤镜链构建测试."""
+
+    def test_basic_volume_only(self):
+        """只有音量调节."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=0.5,
+        )
+        assert "volume=0.500" in result
+        assert "aloop" not in result
+        assert "afade=t=in" not in result
+        assert "afade=t=out" not in result
+        assert "atrim=0:100.000" in result
+        assert "asetpts=N/SR/TB" in result
+
+    def test_with_loop(self):
+        """需要循环的情况."""
+        result = build_bgm_filter_chain(
+            bgm_duration=10,
+            target_duration=100,
+            volume=0.3,
+            loop_enabled=True,
+        )
+        assert "aloop=loop=" in result
+        assert "volume=0.300" in result
+
+    def test_no_loop_when_disabled(self):
+        """禁用循环，即使 BGM 短也不循环."""
+        result = build_bgm_filter_chain(
+            bgm_duration=10,
+            target_duration=100,
+            volume=0.3,
+            loop_enabled=False,
+        )
+        assert "aloop" not in result
+
+    def test_fade_in_only(self):
+        """只有淡入."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=1.0,
+            fade_in=2.5,
+        )
+        assert "afade=t=in:st=0:d=2.500" in result
+        assert "afade=t=out" not in result
+        assert "volume=" not in result  # volume=1.0 不加
+
+    def test_fade_out_only(self):
+        """只有淡出."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=1.0,
+            fade_out=3.0,
+        )
+        assert "afade=t=out:st=97.000:d=3.000" in result
+        assert "afade=t=in" not in result
+
+    def test_fade_in_and_out(self):
+        """淡入+淡出."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=1.0,
+            fade_in=1.5,
+            fade_out=2.0,
+        )
+        assert "afade=t=in:st=0:d=1.500" in result
+        assert "afade=t=out:st=98.000:d=2.000" in result
+
+    def test_volume_1_0_skipped(self):
+        """音量为 1.0 时不添加 volume 滤镜."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=1.0,
+        )
+        assert "volume=" not in result
+
+    def test_volume_0(self):
+        """音量为 0."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=0.0,
+        )
+        assert "volume=0.000" in result
+
+    def test_volume_clamped_high(self):
+        """音量超过 1.0 被钳制."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=1.5,
+        )
+        assert "volume=1.000" not in result  # 1.0不加
+        # 钳制到1.0后和1.0一样，不加volume滤镜
+        # 但因为abs(1.0 - 1.0) < 0.001，所以不添加
+        assert "volume=" not in result
+
+    def test_volume_clamped_low(self):
+        """音量为负被钳制到 0."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=100,
+            volume=-0.5,
+        )
+        assert "volume=0.000" in result
+
+    def test_fade_out_longer_than_duration(self):
+        """淡出时长超过总时长，不加淡出."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=10,
+            volume=1.0,
+            fade_out=20.0,
+        )
+        assert "afade=t=out" not in result
+
+    def test_fade_out_equal_to_duration(self):
+        """淡出时长等于总时长，不加淡出."""
+        result = build_bgm_filter_chain(
+            bgm_duration=200,
+            target_duration=10,
+            volume=1.0,
+            fade_out=10.0,
+        )
+        assert "afade=t=out" not in result
+
+    def test_zero_target_duration_fallback(self):
+        """目标时长为 0，兜底 5 秒."""
+        result = build_bgm_filter_chain(
+            bgm_duration=3,
+            target_duration=0,
+            volume=0.5,
+        )
+        assert "atrim=0:5.000" in result
+
+    def test_negative_target_duration_fallback(self):
+        """目标时长为负，兜底 5 秒."""
+        result = build_bgm_filter_chain(
+            bgm_duration=3,
+            target_duration=-5,
+            volume=0.5,
+        )
+        assert "atrim=0:5.000" in result
+
+    def test_full_chain_with_all_effects(self):
+        """完整滤镜链：循环+音量+淡入淡出+截断+重置."""
+        result = build_bgm_filter_chain(
+            bgm_duration=10,
+            target_duration=100,
+            volume=0.4,
+            fade_in=1.0,
+            fade_out=2.0,
+            loop_enabled=True,
+        )
+        parts = result.split(",")
+        # 顺序：aloop -> volume -> afade in -> afade out -> atrim -> asetpts
+        assert len(parts) >= 6
+        assert "aloop" in parts[0]
+        assert "volume" in parts[1]
+        assert "afade=t=in" in parts[2]
+        assert "afade=t=out" in parts[3]
+        assert "atrim" in parts[4]
+        assert "asetpts" in parts[5]
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# calculate_sidechain_ratio 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCalculateSidechainRatio:
+    """Sidechain 压缩比计算测试."""
+
+    def test_default_ratio_0_3(self):
+        """默认 0.3."""
+        # 1 / (1 - 0.3) = 1.428... 但下限是 2.0
+        assert calculate_sidechain_ratio(0.3) == pytest.approx(2.0, rel=0.01)
+
+    def test_ratio_0_5(self):
+        """比例 0.5."""
+        # 1 / (1 - 0.5) = 2.0
+        assert calculate_sidechain_ratio(0.5) == pytest.approx(2.0, rel=0.01)
+
+    def test_ratio_0_8(self):
+        """比例 0.8."""
+        # 1 / (1 - 0.8) = 5.0
+        assert calculate_sidechain_ratio(0.8) == pytest.approx(5.0, rel=0.01)
+
+    def test_ratio_0_9(self):
+        """比例 0.9."""
+        # 1 / (1 - 0.9) = 10.0
+        assert calculate_sidechain_ratio(0.9) == pytest.approx(10.0, rel=0.01)
+
+    def test_ratio_0(self):
+        """比例 0，返回下限 2.0."""
+        assert calculate_sidechain_ratio(0.0) == 2.0
+
+    def test_ratio_negative(self):
+        """比例为负，返回下限 2.0."""
+        assert calculate_sidechain_ratio(-0.5) == 2.0
+
+    def test_ratio_1_0(self):
+        """比例 1.0，返回上限 10.0."""
+        assert calculate_sidechain_ratio(1.0) == 10.0
+
+    def test_ratio_greater_than_1(self):
+        """比例超过 1.0，返回上限 10.0."""
+        assert calculate_sidechain_ratio(2.0) == 10.0
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# build_simple_mix_filter 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildSimpleMixFilter:
+    """普通混音滤镜构建测试."""
+
+    def test_contains_amix(self):
+        """包含 amix."""
+        result = build_simple_mix_filter()
+        assert "amix=inputs=2" in result
+
+    def test_contains_volume_compensation(self):
+        """包含 volume=2 补偿."""
+        result = build_simple_mix_filter()
+        assert "volume=2" in result
+
+    def test_output_label(self):
+        """输出标签为 [final]."""
+        result = build_simple_mix_filter()
+        assert "[final]" in result
+
+    def test_duration_first(self):
+        """duration=first，以主音频时长为准."""
+        result = build_simple_mix_filter()
+        assert "duration=first" in result
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# build_sidechain_mix_filter 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildSidechainMixFilter:
+    """Sidechain 混音滤镜构建测试."""
+
+    def test_contains_sidechaincompress(self):
+        """包含 sidechaincompress."""
+        result = build_sidechain_mix_filter()
+        assert "sidechaincompress=" in result
+
+    def test_threshold_param(self):
+        """threshold 参数正确."""
+        result = build_sidechain_mix_filter(threshold=-30.0)
+        assert "threshold=-30.0dB" in result
+
+    def test_attack_param(self):
+        """attack 参数正确."""
+        result = build_sidechain_mix_filter(attack=0.05)
+        assert "attack=0.050" in result
+
+    def test_release_param(self):
+        """release 参数正确."""
+        result = build_sidechain_mix_filter(release=0.8)
+        assert "release=0.800" in result
+
+    def test_knee_param(self):
+        """knee=6 参数."""
+        result = build_sidechain_mix_filter()
+        assert "knee=6" in result
+
+    def test_contains_amix(self):
+        """包含 amix 混音."""
+        result = build_sidechain_mix_filter()
+        assert "amix=inputs=2" in result
+
+    def test_volume_compensation(self):
+        """volume=1.5 轻微补偿."""
+        result = build_sidechain_mix_filter()
+        assert "volume=1.5" in result
+
+    def test_bgmc_comp_label(self):
+        """包含 [bgm_comp] 中间标签."""
+        result = build_sidechain_mix_filter()
+        assert "[bgm_comp]" in result
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# normalize_bgm_config 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestNormalizeBGMConfig:
+    """配置规范化测试."""
+
+    def test_empty_dict_defaults(self):
+        """空字典返回默认值."""
+        result = normalize_bgm_config({})
+        assert result["volume"] == 0.3
+        assert result["fade_in"] == 0.0
+        assert result["fade_out"] == 0.0
+        assert result["loop_enabled"] is True
+        assert result["sidechain_enabled"] is False
+        assert result["sidechain_ratio"] == 0.3
+
+    def test_volume_clamped(self):
+        """音量钳制."""
+        result = normalize_bgm_config({"volume": 1.5})
+        assert result["volume"] == 1.0
+        result2 = normalize_bgm_config({"volume": -0.5})
+        assert result2["volume"] == 0.0
+
+    def test_fade_in_negative(self):
+        """淡入为负钳制到 0."""
+        result = normalize_bgm_config({"fade_in": -1})
+        assert result["fade_in"] == 0.0
+
+    def test_fade_out_negative(self):
+        """淡出为负钳制到 0."""
+        result = normalize_bgm_config({"fade_out": -1})
+        assert result["fade_out"] == 0.0
+
+    def test_sidechain_ratio_clamped(self):
+        """sidechain_ratio 钳制."""
+        result = normalize_bgm_config({"sidechain_ratio": 1.5})
+        assert result["sidechain_ratio"] == 1.0
+        result2 = normalize_bgm_config({"sidechain_ratio": -0.1})
+        assert result2["sidechain_ratio"] == 0.0
+
+    def test_sidechain_attack_min(self):
+        """attack 最小值 0.001."""
+        result = normalize_bgm_config({"sidechain_attack": 0})
+        assert result["sidechain_attack"] == 0.001
+
+    def test_sidechain_release_min(self):
+        """release 最小值 0.01."""
+        result = normalize_bgm_config({"sidechain_release": 0})
+        assert result["sidechain_release"] == 0.01
+
+    def test_string_values_converted(self):
+        """字符串数值被转换."""
+        result = normalize_bgm_config(
+            {
+                "volume": "0.5",
+                "fade_in": "2.0",
+            }
+        )
+        assert result["volume"] == 0.5
+        assert result["fade_in"] == 2.0
+
+    def test_loop_enabled_truthy(self):
+        """loop_enabled 真值转换."""
+        result = normalize_bgm_config({"loop_enabled": 1})
+        assert result["loop_enabled"] is True
+        result2 = normalize_bgm_config({"loop_enabled": 0})
+        assert result2["loop_enabled"] is False
+
+    def test_preserves_unknown_keys(self):
+        """未知 key 不保留."""
+        result = normalize_bgm_config({"unknown_key": "value", "volume": 0.5})
+        assert "unknown_key" not in result
+        assert result["volume"] == 0.5
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# validate_bgm_config 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestValidateBGMConfig:
+    """配置验证测试."""
+
+    def test_valid_config(self):
+        """合法配置."""
+        ok, errors = validate_bgm_config(
+            {
+                "volume": 0.5,
+                "fade_in": 1.0,
+                "fade_out": 2.0,
+                "sidechain_ratio": 0.3,
+            }
+        )
+        assert ok is True
+        assert len(errors) == 0
+
+    def test_volume_not_number(self):
+        """volume 不是数字."""
+        ok, errors = validate_bgm_config({"volume": "high"})
+        assert ok is False
+        assert any("volume" in e for e in errors)
+
+    def test_volume_out_of_range(self):
+        """volume 超出范围."""
+        ok, errors = validate_bgm_config({"volume": 1.5})
+        assert ok is False
+        assert any("volume" in e for e in errors)
+
+    def test_fade_in_negative(self):
+        """fade_in 为负."""
+        ok, errors = validate_bgm_config({"fade_in": -1})
+        assert ok is False
+        assert any("fade_in" in e for e in errors)
+
+    def test_fade_out_negative(self):
+        """fade_out 为负."""
+        ok, errors = validate_bgm_config({"fade_out": -1})
+        assert ok is False
+        assert any("fade_out" in e for e in errors)
+
+    def test_sidechain_ratio_out_of_range(self):
+        """sidechain_ratio 超出范围."""
+        ok, errors = validate_bgm_config({"sidechain_ratio": 2.0})
+        assert ok is False
+        assert any("sidechain_ratio" in e for e in errors)
+
+    def test_multiple_errors(self):
+        """多个错误同时报告."""
+        ok, errors = validate_bgm_config(
+            {
+                "volume": 2.0,
+                "fade_in": -1,
+                "sidechain_ratio": -0.5,
+            }
+        )
+        assert ok is False
+        assert len(errors) >= 3
+
+    def test_empty_config_valid(self):
+        """空配置（全用默认值）视为合法."""
+        ok, errors = validate_bgm_config({})
+        assert ok is True
+        assert len(errors) == 0
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# calculate_fade_out_start 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCalculateFadeOutStart:
+    """淡出开始时间计算测试."""
+
+    def test_normal_case(self):
+        """正常情况."""
+        assert calculate_fade_out_start(100, 3) == pytest.approx(97.0)
+
+    def test_zero_fade_out(self):
+        """淡出时长为 0，返回 None."""
+        assert calculate_fade_out_start(100, 0) is None
+
+    def test_negative_fade_out(self):
+        """淡出时长为负，返回 None."""
+        assert calculate_fade_out_start(100, -1) is None
+
+    def test_zero_duration(self):
+        """总时长为 0，返回 None."""
+        assert calculate_fade_out_start(0, 3) is None
+
+    def test_fade_out_longer_than_duration(self):
+        """淡出超过总时长，返回 None."""
+        assert calculate_fade_out_start(10, 20) is None
+
+    def test_fade_out_equal_to_duration(self):
+        """淡出等于总时长，返回 None."""
+        assert calculate_fade_out_start(10, 10) is None
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# estimate_bgm_processing_duration 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestEstimateBGMProcessingDuration:
+    """BGM 处理时长估算测试."""
+
+    def test_normal_case_with_loop(self):
+        """正常循环情况，输出目标时长."""
+        assert estimate_bgm_processing_duration(10, 100, True) == 100
+
+    def test_bgm_longer_no_loop(self):
+        """BGM 够长，不循环，截断到目标时长."""
+        assert estimate_bgm_processing_duration(200, 100, False) == 100
+
+    def test_bgm_shorter_no_loop(self):
+        """BGM 短但不循环，仍然截断到目标时长（实际会更短，但 atrim 会截断）."""
+        assert estimate_bgm_processing_duration(10, 100, False) == 100
+
+    def test_zero_target(self):
+        """目标时长为 0，兜底 5 秒."""
+        assert estimate_bgm_processing_duration(10, 0, True) == 5.0
+
+    def test_negative_target(self):
+        """目标时长为负，兜底 5 秒."""
+        assert estimate_bgm_processing_duration(10, -5, True) == 5.0
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# BGMPureConfig 测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBGMPureConfig:
+    """BGMPureConfig 数据类测试."""
+
+    def test_default_values(self):
+        """默认值正确."""
+        config = BGMPureConfig()
+        assert config.volume == 0.3
+        assert config.fade_in == 0.0
+        assert config.fade_out == 0.0
+        assert config.loop_enabled is True
+        assert config.sidechain_enabled is False
+        assert config.sidechain_ratio == 0.3
+        assert config.sidechain_attack == 0.02
+        assert config.sidechain_release == 0.5
+        assert config.sidechain_threshold == -25.0
+
+    def test_custom_values(self):
+        """自定义值."""
+        config = BGMPureConfig(
+            volume=0.7,
+            fade_in=1.0,
+            fade_out=2.0,
+            loop_enabled=False,
+            sidechain_enabled=True,
+            sidechain_ratio=0.5,
+            sidechain_attack=0.05,
+            sidechain_release=0.8,
+            sidechain_threshold=-30.0,
+        )
+        assert config.volume == 0.7
+        assert config.loop_enabled is False
+        assert config.sidechain_enabled is True
+        assert config.sidechain_threshold == -30.0
@@ -0,0 +1,534 @@
+"""视频拼接引擎纯逻辑单元测试."""
+
+from __future__ import annotations
+
+import pytest
+from video_processing.concat_engine_pure import (
+    build_concat_filter,
+    build_fps_filter,
+    build_scale_pad_filter,
+    build_single_segment_filter_chain,
+    calculate_scaled_size,
+    can_use_stream_copy,
+    count_valid_segments,
+    estimate_total_duration,
+    format_fps_filter,
+    generate_concat_file_list,
+    parse_fps,
+    resolve_output_params,
+    validate_concat_config,
+    validate_video_path,
+)
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 帧率解析测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestParseFps:
+    """parse_fps 测试."""
+
+    def test_integer_fps(self):
+        """整数帧率."""
+        assert parse_fps(30) == 30.0
+
+    def test_float_fps(self):
+        """浮点帧率."""
+        assert parse_fps(29.97) == pytest.approx(29.97)
+
+    def test_string_integer(self):
+        """字符串整数."""
+        assert parse_fps("30") == 30.0
+
+    def test_string_fraction(self):
+        """分数字符串（30/1）."""
+        assert parse_fps("30/1") == 30.0
+
+    def test_fraction_24000_1001(self):
+        """23.976 帧率."""
+        result = parse_fps("24000/1001")
+        assert result == pytest.approx(23.976, rel=0.01)
+
+    def test_none_input(self):
+        """None 输入返回默认值."""
+        assert parse_fps(None) == 30.0
+
+    def test_empty_string(self):
+        """空字符串返回默认值."""
+        assert parse_fps("") == 30.0
+
+    def test_invalid_string(self):
+        """无效字符串."""
+        assert parse_fps("abc") == 30.0
+
+    def test_zero_denominator(self):
+        """分母为 0."""
+        assert parse_fps("30/0") == 30.0
+
+    def test_negative_fps(self):
+        """负帧率."""
+        assert parse_fps(-30) == -30.0
+
+
+class TestFormatFpsFilter:
+    """format_fps_filter 测试."""
+
+    def test_integer_fps(self):
+        """整数帧率."""
+        assert format_fps_filter(30.0) == "fps=30"
+
+    def test_float_fps(self):
+        """浮点帧率."""
+        result = format_fps_filter(29.97)
+        assert result.startswith("fps=")
+        assert "29.97" in result
+
+    def test_near_integer(self):
+        """接近整数."""
+        assert format_fps_filter(30.0001) == "fps=30"
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 输出参数计算测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestResolveOutputParams:
+    """resolve_output_params 测试."""
+
+    def test_all_specified(self):
+        """全部显式指定."""
+        w, h, fps = resolve_output_params(1920, 1080, 60.0)
+        assert w == 1920
+        assert h == 1080
+        assert fps == 60.0
+
+    def test_no_specified_use_defaults(self):
+        """全部未指定，用默认值."""
+        w, h, fps = resolve_output_params(0, 0, 0)
+        assert w == 1080
+        assert h == 1920
+        assert fps == 30.0
+
+    def test_use_first_video_info(self):
+        """用第一段视频信息."""
+        info = {"width": 1280, "height": 720, "r_frame_rate": "24/1"}
+        w, h, fps = resolve_output_params(0, 0, 0, info)
+        assert w == 1280
+        assert h == 720
+        assert fps == 24.0
+
+    def test_partial_specified(self):
+        """部分指定，未指定的用探测值."""
+        info = {"width": 1280, "height": 720, "r_frame_rate": "24/1"}
+        w, h, fps = resolve_output_params(1920, 0, 0, info)
+        assert w == 1920  # 指定的
+        assert h == 720  # 探测的
+        assert fps == 24.0
+
+    def test_zero_size_clamped(self):
+        """零尺寸被钳制."""
+        w, h, fps = resolve_output_params(0, 0, 0, {})
+        assert w >= 1
+        assert h >= 1
+        assert fps >= 1.0
+
+    def test_custom_defaults(self):
+        """自定义默认值."""
+        w, h, fps = resolve_output_params(0, 0, 0, None, 640, 480, 25.0)
+        assert w == 640
+        assert h == 480
+        assert fps == 25.0
+
+
+class TestCalculateScaledSize:
+    """calculate_scaled_size 测试."""
+
+    def test_same_ratio(self):
+        """比例相同."""
+        sw, sh, ox, oy = calculate_scaled_size(1920, 1080, 1920, 1080)
+        assert sw == 1920
+        assert sh == 1080
+        assert ox == 0
+        assert oy == 0
+
+    def test_wider_source(self):
+        """源更宽，上下填黑边."""
+        sw, sh, ox, oy = calculate_scaled_size(1920, 1080, 1080, 1920)
+        assert sw == 1080  # 以宽度为准
+        assert sh < 1920  # 高度按比例
+        assert ox == 0
+        assert oy > 0  # 垂直居中
+
+    def test_taller_source(self):
+        """源更高，左右填黑边."""
+        sw, sh, ox, oy = calculate_scaled_size(1080, 1920, 1920, 1080)
+        assert sh == 1080  # 以高度为准
+        assert sw < 1920  # 宽度按比例
+        assert ox > 0  # 水平居中
+        assert oy == 0
+
+    def test_zero_source(self):
+        """零尺寸源."""
+        sw, sh, ox, oy = calculate_scaled_size(0, 0, 100, 100)
+        assert sw == 100
+        assert sh == 100
+
+    def test_scale_down(self):
+        """缩小."""
+        sw, sh, ox, oy = calculate_scaled_size(1920, 1080, 640, 360)
+        assert sw == 640
+        assert sh == 360
+        assert ox == 0
+        assert oy == 0
+
+    def test_scale_up(self):
+        """放大."""
+        sw, sh, ox, oy = calculate_scaled_size(640, 360, 1920, 1080)
+        assert sw == 1920
+        assert sh == 1080
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# stream copy 判断测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCanUseStreamCopy:
+    """can_use_stream_copy 测试."""
+
+    def test_identical_segments(self):
+        """所有段参数相同，可以 stream copy."""
+        segs = [
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+        ]
+        assert can_use_stream_copy(segs, 1920, 1080, 30.0) is True
+
+    def test_force_reencode(self):
+        """强制重编码."""
+        segs = [
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+        ]
+        assert can_use_stream_copy(segs, 1920, 1080, 30.0, force_reencode=True) is False
+
+    def test_different_codec(self):
+        """编码不同."""
+        segs = [
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+            {"codec_name": "hevc", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+        ]
+        assert can_use_stream_copy(segs, 1920, 1080, 30.0) is False
+
+    def test_different_resolution(self):
+        """分辨率不同."""
+        segs = [
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+            {"codec_name": "h264", "width": 1280, "height": 720, "r_frame_rate": "30/1"},
+        ]
+        assert can_use_stream_copy(segs, 1920, 1080, 30.0) is False
+
+    def test_different_fps(self):
+        """帧率不同."""
+        segs = [
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "60/1"},
+        ]
+        assert can_use_stream_copy(segs, 1920, 1080, 30.0) is False
+
+    def test_target_differs(self):
+        """目标参数与源不同."""
+        segs = [
+            {"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"},
+        ]
+        assert can_use_stream_copy(segs, 1280, 720, 30.0) is False
+
+    def test_empty_segments(self):
+        """空列表."""
+        assert can_use_stream_copy([], 1920, 1080, 30.0) is False
+
+    def test_single_segment(self):
+        """单段."""
+        segs = [{"codec_name": "h264", "width": 1920, "height": 1080, "r_frame_rate": "30/1"}]
+        assert can_use_stream_copy(segs, 1920, 1080, 30.0) is True
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 文件列表生成测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestGenerateConcatFileList:
+    """generate_concat_file_list 测试."""
+
+    def test_single_file(self):
+        """单个文件."""
+        result = generate_concat_file_list(["/a.mp4"])
+        assert "file '/a.mp4'" in result
+        assert result.endswith("\n")
+
+    def test_multiple_files(self):
+        """多个文件."""
+        result = generate_concat_file_list(["/a.mp4", "/b.mp4", "/c.mp4"])
+        lines = result.strip().split("\n")
+        assert len(lines) == 3
+        assert lines[0] == "file '/a.mp4'"
+        assert lines[1] == "file '/b.mp4'"
+        assert lines[2] == "file '/c.mp4'"
+
+    def test_empty_list(self):
+        """空列表."""
+        result = generate_concat_file_list([])
+        assert result == "\n"
+
+    def test_path_with_single_quote(self):
+        """路径包含单引号（转义）."""
+        result = generate_concat_file_list(["/path/to/file's.mp4"])
+        # 单引号应该被转义
+        assert "'\\''" in result or file
+        assert "file '" in result
+
+    def test_path_with_spaces(self):
+        """路径包含空格."""
+        result = generate_concat_file_list(["/path/to/my video.mp4"])
+        assert "my video" in result
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 滤镜构建测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildScalePadFilter:
+    """scale+pad 滤镜测试."""
+
+    def test_contains_scale(self):
+        """包含 scale."""
+        result = build_scale_pad_filter(1920, 1080)
+        assert "scale=" in result
+
+    def test_contains_pad(self):
+        """包含 pad."""
+        result = build_scale_pad_filter(1920, 1080)
+        assert "pad=" in result
+        assert "1920:1080" in result
+
+    def test_force_original_aspect_ratio(self):
+        """保持宽高比."""
+        result = build_scale_pad_filter(1920, 1080)
+        assert "force_original_aspect_ratio=decrease" in result
+
+    def test_black_padding(self):
+        """黑边填充."""
+        result = build_scale_pad_filter(1920, 1080)
+        assert ":black" in result
+
+
+class TestBuildFpsFilter:
+    """fps 滤镜测试."""
+
+    def test_integer_fps(self):
+        """整数帧率."""
+        assert build_fps_filter(30.0) == "fps=30"
+
+    def test_float_fps(self):
+        """浮点帧率."""
+        result = build_fps_filter(29.97)
+        assert result.startswith("fps=")
+
+
+class TestBuildConcatFilter:
+    """concat 滤镜测试."""
+
+    def test_two_inputs_with_audio(self):
+        """两路输入，有音频."""
+        result = build_concat_filter(2, has_audio=True)
+        assert "[0:v][0:a][1:v][1:a]concat=n=2:v=1:a=1" in result
+        assert "[concat_v][concat_a]" in result
+
+    def test_three_inputs_video_only(self):
+        """三路输入，无音频."""
+        result = build_concat_filter(3, has_audio=False)
+        assert "[0:v][1:v][2:v]concat=n=3:v=1:a=0" in result
+        assert "[concat_v]" in result
+
+    def test_single_input(self):
+        """单路输入."""
+        result = build_concat_filter(1, has_audio=True)
+        assert "[0:v][0:a]concat=n=1:v=1:a=1" in result
+
+    def test_zero_inputs(self):
+        """零输入."""
+        assert build_concat_filter(0) == ""
+
+
+class TestBuildSingleSegmentFilterChain:
+    """单段滤镜链测试."""
+
+    def test_with_audio(self):
+        """有音频."""
+        result = build_single_segment_filter_chain(1920, 1080, 30.0, 0)
+        assert "scale=" in result
+        assert "fps=" in result
+        assert "setpts=PTS-STARTPTS" in result
+        assert "asetpts=PTS-STARTPTS" in result
+        assert "[v0]" in result
+        assert "[a0]" in result
+
+    def test_video_only(self):
+        """无音频."""
+        result = build_single_segment_filter_chain(1920, 1080, 30.0, 1, has_audio=False)
+        assert "scale=" in result
+        assert "setpts=" in result
+        assert "asetpts" not in result
+        assert "[v1]" in result
+
+    def test_segment_index_in_labels(self):
+        """段索引在标签中."""
+        result = build_single_segment_filter_chain(1920, 1080, 30.0, 5)
+        assert "[5:v]" in result
+        assert "[v5]" in result
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 配置验证测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestValidateConcatConfig:
+    """配置验证测试."""
+
+    def test_valid_config(self):
+        """合法配置."""
+        config = {
+            "segments": [{"video_path": "/a.mp4"}, {"video_path": "/b.mp4"}],
+            "output_width": 1920,
+            "output_height": 1080,
+            "output_fps": 30,
+        }
+        ok, errors = validate_concat_config(config)
+        assert ok is True
+        assert len(errors) == 0
+
+    def test_empty_segments(self):
+        """空段列表."""
+        ok, errors = validate_concat_config({"segments": []})
+        assert ok is False
+        assert any("至少需要" in e or "视频段" in e for e in errors)
+
+    def test_missing_video_path(self):
+        """缺少 video_path."""
+        config = {"segments": [{"video_path": "/a.mp4"}, {}]}
+        ok, errors = validate_concat_config(config)
+        assert ok is False
+        assert any("video_path" in e for e in errors)
+
+    def test_negative_width(self):
+        """负宽度."""
+        config = {"segments": [{"video_path": "/a.mp4"}], "output_width": -100}
+        ok, errors = validate_concat_config(config)
+        assert ok is False
+        assert any("output_width" in e for e in errors)
+
+    def test_negative_height(self):
+        """负高度."""
+        config = {"segments": [{"video_path": "/a.mp4"}], "output_height": -100}
+        ok, errors = validate_concat_config(config)
+        assert ok is False
+        assert any("output_height" in e for e in errors)
+
+    def test_negative_fps(self):
+        """负帧率."""
+        config = {"segments": [{"video_path": "/a.mp4"}], "output_fps": -30}
+        ok, errors = validate_concat_config(config)
+        assert ok is False
+        assert any("output_fps" in e for e in errors)
+
+    def test_zero_output_params_ok(self):
+        """零输出参数合法（表示自动探测）."""
+        config = {"segments": [{"video_path": "/a.mp4"}]}
+        ok, errors = validate_concat_config(config)
+        assert ok is True
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 路径验证测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestValidateVideoPath:
+    """视频路径验证测试."""
+
+    def test_empty_path(self):
+        """空路径."""
+        ok, msg = validate_video_path("", "/work")
+        assert ok is False
+        assert "不能为空" in msg
+
+    def test_path_traversal(self):
+        """路径遍历."""
+        ok, msg = validate_video_path("../etc/passwd", "/work")
+        assert ok is False
+        assert "回溯" in msg or ".." in msg
+
+    def test_valid_relative_path(self):
+        """相对路径（不检查边界）."""
+        ok, msg = validate_video_path("video.mp4", "/work")
+        assert ok is True
+
+    def test_valid_absolute_path(self):
+        """绝对路径在工作目录内."""
+        ok, msg = validate_video_path("/work/sub/video.mp4", "/work")
+        assert ok is True
+
+    def test_path_outside_work_dir(self):
+        """路径在工作目录外."""
+        ok, msg = validate_video_path("/etc/passwd", "/work")
+        assert ok is False
+        assert "工作目录" in msg
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 工具函数测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestEstimateTotalDuration:
+    """总时长估算测试."""
+
+    def test_multiple_segments(self):
+        """多段视频."""
+        segs = [{"duration": 10}, {"duration": 20.5}, {"duration": 5}]
+        assert estimate_total_duration(segs) == pytest.approx(35.5)
+
+    def test_empty_list(self):
+        """空列表."""
+        assert estimate_total_duration([]) == 0.0
+
+    def test_invalid_duration_skipped(self):
+        """无效时长跳过."""
+        segs = [{"duration": 10}, {"duration": "abc"}, {"duration": 20}]
+        assert estimate_total_duration(segs) == pytest.approx(30.0)
+
+    def test_missing_duration(self):
+        """缺 duration 字段."""
+        segs = [{}, {"duration": 10}]
+        assert estimate_total_duration(segs) == pytest.approx(10.0)
+
+
+class TestCountValidSegments:
+    """有效段统计测试."""
+
+    def test_all_valid(self):
+        """全部有效."""
+        segs = [{"video_path": "/a.mp4"}, {"video_path": "/b.mp4"}]
+        assert count_valid_segments(segs) == 2
+
+    def test_some_invalid(self):
+        """部分无效."""
+        segs = [{"video_path": "/a.mp4"}, {}, {"video_path": ""}]
+        assert count_valid_segments(segs) == 1
+
+    def test_empty_list(self):
+        """空列表."""
+        assert count_valid_segments([]) == 0
@@ -0,0 +1,638 @@
+"""多轨混音纯逻辑单元测试."""
+
+from __future__ import annotations
+
+import math
+
+import pytest
+from video_processing.multi_track_mixer_pure import (
+    build_amix_filter,
+    build_mix_filter_complex,
+    build_track_filter_chain,
+    calculate_amix_volume_compensation,
+    calculate_effective_range,
+    calculate_total_tracks,
+    count_track_types,
+    db_to_linear,
+    estimate_mix_duration,
+    filter_enabled_tracks,
+    is_track_visible,
+    linear_to_db,
+    normalize_volume,
+    sort_tracks_by_priority,
+    validate_audio_track,
+    validate_mix_config,
+)
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 时间计算测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCalculateEffectiveRange:
+    """有效时间范围计算测试."""
+
+    def test_normal_track(self):
+        """正常轨道."""
+        start, dur, trim = calculate_effective_range(5, 10, 30, 60)
+        assert start == 5.0
+        assert dur == 10.0
+        assert trim == 0.0
+
+    def test_track_longer_than_audio(self):
+        """轨道时长超过音频长度."""
+        start, dur, trim = calculate_effective_range(0, 100, 30, 60)
+        assert start == 0.0
+        assert dur == 30.0  # 用音频全长
+
+    def test_zero_track_duration(self):
+        """轨道时长为 0（用音频全长）."""
+        start, dur, trim = calculate_effective_range(0, 0, 30, 60)
+        assert start == 0.0
+        assert dur == 30.0
+
+    def test_negative_start_time(self):
+        """负开始时间（从音频中间取）."""
+        start, dur, trim = calculate_effective_range(-5, 20, 30, 60)
+        assert start == 0.0
+        assert dur == 15.0  # 20 - 5 = 15
+        assert trim == 5.0
+
+    def test_track_after_target(self):
+        """轨道完全在目标之后."""
+        start, dur, trim = calculate_effective_range(100, 10, 30, 60)
+        assert dur == 0.0
+
+    def test_track_before_zero(self):
+        """轨道完全在 0 之前."""
+        start, dur, trim = calculate_effective_range(-50, 10, 30, 60)
+        assert dur == 0.0
+
+    def test_zero_audio_duration(self):
+        """音频时长为 0."""
+        start, dur, trim = calculate_effective_range(0, 10, 0, 60)
+        assert dur == 0.0
+
+    def test_track_extends_beyond_target(self):
+        """轨道超出目标时长."""
+        start, dur, trim = calculate_effective_range(50, 20, 30, 60)
+        assert start == 50.0
+        assert dur == 10.0  # 60 - 50 = 10
+
+    def test_full_target_duration(self):
+        """轨道覆盖整个目标时长."""
+        start, dur, trim = calculate_effective_range(0, 0, 100, 60)
+        assert start == 0.0
+        assert dur == 60.0
+
+
+class TestIsTrackVisible:
+    """轨道可见性测试."""
+
+    def test_visible_track(self):
+        """可见轨道."""
+        assert is_track_visible(5, 10, 30, 60) is True
+
+    def test_invisible_after_target(self):
+        """目标之后不可见."""
+        assert is_track_visible(100, 10, 30, 60) is False
+
+    def test_invisible_zero_duration(self):
+        """零时长不可见."""
+        assert is_track_visible(0, 0, 0, 60) is False
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 滤镜链构建测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildTrackFilterChain:
+    """单轨滤镜链构建测试."""
+
+    def test_basic_structure(self):
+        """基本结构：截断+音量+淡入淡出+延迟+截断."""
+        result = build_track_filter_chain(
+            volume=0.5,
+            fade_in=1.0,
+            fade_out=1.0,
+            effective_start=5.0,
+            need_duration=10.0,
+            trim_start=0.0,
+            target_duration=60.0,
+        )
+        assert "atrim=0.000:10.000" in result
+        assert "volume=0.500" in result
+        assert "afade=t=in:st=0:d=1.000" in result
+        assert "afade=t=out" in result
+        assert "adelay=5000|5000" in result
+        assert "atrim=0:60.000" in result
+
+    def test_volume_1_0_skipped(self):
+        """音量为 1.0 不添加 volume 滤镜."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=0,
+            fade_out=0,
+            effective_start=0,
+            need_duration=10,
+            trim_start=0,
+            target_duration=60,
+        )
+        assert "volume=" not in result
+
+    def test_no_fade_in(self):
+        """无淡入."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=0,
+            fade_out=2.0,
+            effective_start=0,
+            need_duration=10,
+            trim_start=0,
+            target_duration=60,
+        )
+        assert "afade=t=in" not in result
+        assert "afade=t=out" in result
+
+    def test_no_delay(self):
+        """无延迟（effective_start 很小）."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=0,
+            fade_out=0,
+            effective_start=0.001,
+            need_duration=10,
+            trim_start=0,
+            target_duration=60,
+        )
+        assert "adelay" not in result
+
+    def test_with_delay(self):
+        """有延迟."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=0,
+            fade_out=0,
+            effective_start=2.5,
+            need_duration=10,
+            trim_start=0,
+            target_duration=60,
+        )
+        assert "adelay=2500|2500" in result
+
+    def test_fade_in_longer_than_duration(self):
+        """淡入超过总时长，不添加淡入."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=20,
+            fade_out=0,
+            effective_start=0,
+            need_duration=10,
+            trim_start=0,
+            target_duration=60,
+        )
+        assert "afade=t=in" not in result
+
+    def test_fade_out_at_start(self):
+        """淡出从 0 开始（很短的音频）."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=0,
+            fade_out=15,
+            effective_start=0,
+            need_duration=10,
+            trim_start=0,
+            target_duration=60,
+        )
+        # fade_out > need_duration，不添加
+        assert "afade=t=out" not in result
+
+    def test_trim_start_nonzero(self):
+        """从音频中间开始截取."""
+        result = build_track_filter_chain(
+            volume=1.0,
+            fade_in=0,
+            fade_out=0,
+            effective_start=0,
+            need_duration=5,
+            trim_start=3.0,
+            target_duration=60,
+        )
+        assert "atrim=3.000:8.000" in result  # 3.0 to 3.0+5.0
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# amix 滤镜测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildAmixFilter:
+    """amix 滤镜构建测试."""
+
+    def test_two_inputs(self):
+        """两路输入."""
+        result = build_amix_filter(2)
+        assert "amix=inputs=2" in result
+        assert "duration=longest" in result
+
+    def test_five_inputs(self):
+        """五路输入."""
+        result = build_amix_filter(5)
+        assert "amix=inputs=5" in result
+
+    def test_zero_inputs(self):
+        """零输入."""
+        assert build_amix_filter(0) == ""
+
+    def test_duration_shortest(self):
+        """shortest 模式."""
+        result = build_amix_filter(3, "shortest")
+        assert "duration=shortest" in result
+
+    def test_invalid_duration_mode(self):
+        """无效模式，默认 longest."""
+        result = build_amix_filter(3, "invalid")
+        assert "duration=longest" in result
+
+
+class TestCalculateAmixVolumeCompensation:
+    """音量补偿计算测试."""
+
+    def test_single_track(self):
+        """单轨，无需补偿."""
+        assert calculate_amix_volume_compensation(1) == 1.0
+
+    def test_two_tracks(self):
+        """两轨，补偿 2x."""
+        assert calculate_amix_volume_compensation(2) == 2.0
+
+    def test_five_tracks(self):
+        """五轨，补偿 5x."""
+        assert calculate_amix_volume_compensation(5) == 5.0
+
+    def test_zero_tracks(self):
+        """零轨，返回 1."""
+        assert calculate_amix_volume_compensation(0) == 1.0
+
+
+class TestBuildMixFilterComplex:
+    """完整混音滤镜测试."""
+
+    def test_with_main_and_two_tracks(self):
+        """主音频 + 2 条轨道."""
+        result = build_mix_filter_complex(2, has_main=True)
+        assert "[0:a][1:a][2:a]" in result  # 3 路输入
+        assert "amix=inputs=3" in result
+        assert "volume=3" in result  # 3x 补偿
+        assert "[mixed]" in result
+
+    def test_no_main_three_tracks(self):
+        """无主音频，3 条轨道."""
+        result = build_mix_filter_complex(3, has_main=False)
+        assert "[0:a][1:a][2:a]" in result
+        assert "amix=inputs=3" in result
+        assert "[mixed]" in result
+
+    def test_zero_tracks_no_main(self):
+        """无轨道无主音频."""
+        assert build_mix_filter_complex(0, has_main=False) == ""
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 音量计算测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestNormalizeVolume:
+    """音量规范化测试."""
+
+    def test_normal_volume(self):
+        """正常音量."""
+        assert normalize_volume(0.5) == 0.5
+
+    def test_none_default(self):
+        """None 默认 1.0."""
+        assert normalize_volume(None) == 1.0
+
+    def test_below_zero_clamped(self):
+        """负值钳制到 0."""
+        assert normalize_volume(-5) == 0.0
+
+    def test_above_max_clamped(self):
+        """超过上限钳制."""
+        assert normalize_volume(3.0) == 2.0
+
+    def test_string_input(self):
+        """字符串输入."""
+        assert normalize_volume("0.5") == 0.5
+
+    def test_invalid_string(self):
+        """无效字符串默认 1.0."""
+        assert normalize_volume("abc") == 1.0
+
+
+class TestDbConversion:
+    """dB 转换测试."""
+
+    def test_0_db_is_unity(self):
+        """0 dB = 1.0."""
+        assert db_to_linear(0) == pytest.approx(1.0)
+
+    def test_negative_db(self):
+        """负 dB < 1."""
+        assert db_to_linear(-6) == pytest.approx(0.5, rel=0.01)
+
+    def test_positive_db(self):
+        """正 dB > 1."""
+        assert db_to_linear(6) == pytest.approx(2.0, rel=0.01)
+
+    def test_round_trip(self):
+        """往返转换."""
+        original = 0.5
+        db = linear_to_db(original)
+        result = db_to_linear(db)
+        assert result == pytest.approx(original)
+
+    def test_zero_linear_is_negative_inf(self):
+        """零线性值 = -inf dB."""
+        assert math.isinf(linear_to_db(0))
+        assert linear_to_db(0) < 0
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 轨道排序与过滤测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestSortTracksByPriority:
+    """轨道优先级排序测试."""
+
+    def test_sorted_by_priority(self):
+        """按优先级排序."""
+        tracks = [
+            {"priority": 10, "name": "high"},
+            {"priority": 1, "name": "highest"},
+            {"priority": 100, "name": "low"},
+        ]
+        result = sort_tracks_by_priority(tracks)
+        assert result[0]["name"] == "highest"
+        assert result[1]["name"] == "high"
+        assert result[2]["name"] == "low"
+
+    def test_default_priority_100(self):
+        """默认优先级 100."""
+        tracks = [
+            {"priority": 50, "name": "mid"},
+            {"name": "default"},
+        ]
+        result = sort_tracks_by_priority(tracks)
+        assert result[0]["name"] == "mid"
+        assert result[1]["name"] == "default"
+
+    def test_same_preserves_order(self):
+        """同优先级保持顺序."""
+        tracks = [
+            {"priority": 10, "name": "first"},
+            {"priority": 10, "name": "second"},
+        ]
+        result = sort_tracks_by_priority(tracks)
+        assert result[0]["name"] == "first"
+        assert result[1]["name"] == "second"
+
+    def test_empty_list(self):
+        """空列表."""
+        assert sort_tracks_by_priority([]) == []
+
+
+class TestFilterEnabledTracks:
+    """启用轨道过滤测试."""
+
+    def test_all_enabled(self):
+        """全部启用."""
+        tracks = [{"enabled": True}, {"enabled": True}]
+        assert len(filter_enabled_tracks(tracks)) == 2
+
+    def test_mixed(self):
+        """混合."""
+        tracks = [
+            {"enabled": True, "name": "a"},
+            {"enabled": False, "name": "b"},
+        ]
+        result = filter_enabled_tracks(tracks)
+        assert len(result) == 1
+        assert result[0]["name"] == "a"
+
+    def test_default_enabled(self):
+        """默认启用."""
+        tracks = [{"name": "a"}]
+        assert len(filter_enabled_tracks(tracks)) == 1
+
+    def test_empty_list(self):
+        """空列表."""
+        assert filter_enabled_tracks([]) == []
+
+
+class TestCountTrackTypes:
+    """轨道类型统计测试."""
+
+    def test_mixed_types(self):
+        """混合类型."""
+        tracks = [
+            {"track_type": "bgm"},
+            {"track_type": "voiceover"},
+            {"track_type": "bgm"},
+            {"track_type": "sfx"},
+        ]
+        counts = count_track_types(tracks)
+        assert counts["bgm"] == 2
+        assert counts["voiceover"] == 1
+        assert counts["sfx"] == 1
+
+    def test_default_type(self):
+        """默认类型."""
+        tracks = [{}]
+        counts = count_track_types(tracks)
+        assert counts["unknown"] == 1
+
+    def test_empty_list(self):
+        """空列表."""
+        assert count_track_types([]) == {}
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 配置验证测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestValidateAudioTrack:
+    """单轨验证测试."""
+
+    def test_valid_track(self):
+        """合法轨道."""
+        ok, errors = validate_audio_track(
+            {
+                "audio_path": "/audio.mp3",
+                "volume": 0.8,
+                "fade_in": 1.0,
+                "fade_out": 2.0,
+            }
+        )
+        assert ok is True
+        assert len(errors) == 0
+
+    def test_missing_path(self):
+        """缺路径."""
+        ok, errors = validate_audio_track({})
+        assert ok is False
+        assert any("audio_path" in e or "asset_id" in e for e in errors)
+
+    def test_negative_volume(self):
+        """负音量."""
+        ok, errors = validate_audio_track(
+            {
+                "audio_path": "/a.mp3",
+                "volume": -1,
+            }
+        )
+        assert ok is False
+        assert any("volume" in e for e in errors)
+
+    def test_negative_fade_in(self):
+        """负淡入."""
+        ok, errors = validate_audio_track(
+            {
+                "audio_path": "/a.mp3",
+                "fade_in": -1,
+            }
+        )
+        assert ok is False
+        assert any("fade_in" in e for e in errors)
+
+    def test_negative_fade_out(self):
+        """负淡出."""
+        ok, errors = validate_audio_track(
+            {
+                "audio_path": "/a.mp3",
+                "fade_out": -1,
+            }
+        )
+        assert ok is False
+        assert any("fade_out" in e for e in errors)
+
+    def test_invalid_volume_type(self):
+        """无效音量类型."""
+        ok, errors = validate_audio_track(
+            {
+                "audio_path": "/a.mp3",
+                "volume": "loud",
+            }
+        )
+        assert ok is False
+        assert any("volume" in e for e in errors)
+
+    def test_with_asset_id(self):
+        """有 asset_id 无 audio_path 也合法."""
+        ok, errors = validate_audio_track({"asset_id": "123"})
+        assert ok is True
+
+
+class TestValidateMixConfig:
+    """混音配置验证测试."""
+
+    def test_valid_config(self):
+        """合法配置."""
+        ok, errors = validate_mix_config(
+            {
+                "tracks": [
+                    {"audio_path": "/a.mp3", "volume": 0.5},
+                    {"audio_path": "/b.mp3", "volume": 0.8},
+                ],
+                "target_duration": 60,
+            }
+        )
+        assert ok is True
+
+    def test_empty_tracks(self):
+        """空轨道列表."""
+        ok, errors = validate_mix_config({"tracks": []})
+        assert ok is False
+        assert any("至少需要" in e for e in errors)
+
+    def test_invalid_track(self):
+        """无效轨道."""
+        ok, errors = validate_mix_config(
+            {
+                "tracks": [
+                    {"audio_path": "/a.mp3"},
+                    {},  # 无效
+                ],
+            }
+        )
+        assert ok is False
+        assert len(errors) >= 1
+
+    def test_negative_target_duration(self):
+        """负目标时长."""
+        ok, errors = validate_mix_config(
+            {
+                "tracks": [{"audio_path": "/a.mp3"}],
+                "target_duration": -10,
+            }
+        )
+        assert ok is False
+        assert any("target_duration" in e for e in errors)
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 工具函数测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCalculateTotalTracks:
+    """总轨道数计算测试."""
+
+    def test_with_main(self):
+        """含主音频."""
+        assert calculate_total_tracks({"tracks": [1, 2, 3]}) == 4
+
+    def test_without_main(self):
+        """不含主音频."""
+        assert (
+            calculate_total_tracks(
+                {
+                    "tracks": [1, 2],
+                    "has_main_audio": False,
+                }
+            )
+            == 2
+        )
+
+    def test_empty_tracks_with_main(self):
+        """无轨道，只有主音频."""
+        assert calculate_total_tracks({"tracks": []}) == 1
+
+
+class TestEstimateMixDuration:
+    """混音时长估算测试."""
+
+    def test_multiple_tracks(self):
+        """多轨道取最长结束时间."""
+        tracks = [
+            {"start_time": 0, "duration": 10},
+            {"start_time": 5, "duration": 20},  # 结束 25
+            {"start_time": 2, "duration": 5},
+        ]
+        assert estimate_mix_duration(tracks) == pytest.approx(25.0)
+
+    def test_empty_list(self):
+        """空列表."""
+        assert estimate_mix_duration([]) == 0.0
+
+    def test_zero_duration_tracks_ignored(self):
+        """零时长轨道忽略."""
+        tracks = [
+            {"start_time": 0, "duration": 0},
+            {"start_time": 5, "duration": 10},
+        ]
+        assert estimate_mix_duration(tracks) == pytest.approx(15.0)
@@ -0,0 +1,966 @@
+"""PiP Engine 纯逻辑单测.
+
+测试 pip_engine_pure.py 中的所有纯函数，
+0 FFmpeg 依赖，快速轻量。
+"""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+import pytest
+from video_processing.pip_engine_pure import (
+    build_animation_filters,
+    build_enable_expr,
+    build_overlay_expr,
+    build_pip_filters,
+    build_pip_pre_filter,
+    compute_pip_position,
+    compute_pip_size,
+    count_visible_layers,
+    sort_layers_by_z_index,
+    validate_pip_layer,
+)
+
+from packages.domain.pip_config import (
+    ANIMATION_FADE,
+    ANIMATION_SLIDE_BOTTOM,
+    ANIMATION_SLIDE_LEFT,
+    ANIMATION_SLIDE_RIGHT,
+    ANIMATION_SLIDE_TOP,
+    PiPLayerConfig,
+)
+
+# ── 常量与工具 ────────────────────────────────────────────────────────────────
+
+OUTPUT_W = 1080
+OUTPUT_H = 1920
+
+
+def _make_layer(**kwargs) -> PiPLayerConfig:
+    """快速创建图层配置."""
+    defaults = dict(
+        source_type="local_path",
+        source="/tmp/test.mp4",
+        width="25%",
+        height=None,
+        position="bottom_right",
+        margin=20,
+        opacity=1.0,
+        corner_radius=0,
+        border_width=0,
+        border_color="black",
+        z_index=0,
+        start_time=0.0,
+        duration=None,
+        animation_in=None,
+        animation_out=None,
+        animation_duration=0.5,
+    )
+    defaults.update(kwargs)
+    return PiPLayerConfig(**defaults)
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# compute_pip_size
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestComputePipSize:
+    """尺寸计算测试."""
+
+    def test_percentage_width_auto_height(self):
+        """百分比宽度，自动高度（16:9）."""
+        layer = _make_layer(width="25%")
+        w, h = compute_pip_size(layer, OUTPUT_W, OUTPUT_H)
+        assert w == 270  # 1080 * 25%
+        assert h == 151  # 270 * 9 / 16 = 151.875 → 151
+
+    def test_pixel_width_and_height(self):
+        """像素宽高."""
+        layer = _make_layer(width=300, height=200)
+        w, h = compute_pip_size(layer, OUTPUT_W, OUTPUT_H)
+        assert w == 300
+        assert h == 200
+
+    def test_pixel_width_percent_height(self):
+        """像素宽 + 百分比高."""
+        layer = _make_layer(width=200, height="10%")
+        w, h = compute_pip_size(layer, OUTPUT_W, OUTPUT_H)
+        assert w == 200
+        assert h == 192  # 1920 * 10%
+
+    def test_full_width_clamped(self):
+        """超过输出尺寸时钳制到输出范围内."""
+        layer = _make_layer(width="200%")
+        w, h = compute_pip_size(layer, OUTPUT_W, OUTPUT_H)
+        assert w == OUTPUT_W
+        assert h <= OUTPUT_H  # 按比例后高度不超过输出
+
+    def test_zero_width_minimum(self):
+        """极小尺寸钳制到至少 1 像素."""
+        layer = _make_layer(width="0%")
+        w, h = compute_pip_size(layer, OUTPUT_W, OUTPUT_H)
+        assert w >= 1
+        assert h >= 1
+
+    def test_pixel_int_width(self):
+        """整数像素宽度."""
+        layer = _make_layer(width=500, height=300)
+        w, h = compute_pip_size(layer, OUTPUT_W, OUTPUT_H)
+        assert w == 500
+        assert h == 300
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# compute_pip_position
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestComputePipPosition:
+    """位置计算测试."""
+
+    def test_bottom_right(self):
+        """右下角位置."""
+        layer = _make_layer(position="bottom_right", margin=20)
+        pip_w, pip_h = 200, 150
+        x, y = compute_pip_position(layer, pip_w, pip_h, OUTPUT_W, OUTPUT_H)
+        assert x == OUTPUT_W - pip_w - 20
+        assert y == OUTPUT_H - pip_h - 20
+
+    def test_top_left(self):
+        """左上角."""
+        layer = _make_layer(position="top_left", margin=10)
+        x, y = compute_pip_position(layer, 200, 150, OUTPUT_W, OUTPUT_H)
+        assert x == 10
+        assert y == 10
+
+    def test_top_center(self):
+        """顶部居中."""
+        layer = _make_layer(position="top_center", margin=20)
+        x, y = compute_pip_position(layer, 200, 150, OUTPUT_W, OUTPUT_H)
+        assert x == (OUTPUT_W - 200) // 2
+        assert y == 20
+
+    def test_center(self):
+        """正中心."""
+        layer = _make_layer(position="center")
+        x, y = compute_pip_position(layer, 200, 150, OUTPUT_W, OUTPUT_H)
+        assert x == (OUTPUT_W - 200) // 2
+        assert y == (OUTPUT_H - 150) // 2
+
+    def test_custom_position(self):
+        """自定义坐标."""
+        layer = _make_layer(position="custom", x=100, y=200)
+        x, y = compute_pip_position(layer, 200, 150, OUTPUT_W, OUTPUT_H)
+        assert x == 100
+        assert y == 200
+
+    def test_margin_effect(self):
+        """不同 margin 值影响位置."""
+        layer1 = _make_layer(position="bottom_right", margin=0)
+        layer2 = _make_layer(position="bottom_right", margin=50)
+        x1, y1 = compute_pip_position(layer1, 200, 150, OUTPUT_W, OUTPUT_H)
+        x2, y2 = compute_pip_position(layer2, 200, 150, OUTPUT_W, OUTPUT_H)
+        assert x1 > x2
+        assert y1 > y2
+
+    def test_clamped_when_outside(self):
+        """自定义坐标超出画面时钳制到边界内."""
+        layer = _make_layer(position="custom", x=-50, y=99999)
+        x, y = compute_pip_position(layer, 200, 150, OUTPUT_W, OUTPUT_H)
+        assert x >= 0
+        assert x <= OUTPUT_W - 200
+        assert y >= 0
+        assert y == OUTPUT_H - 150  # y 超出底部，钳制到底部
+
+    def test_bottom_center(self):
+        """底部居中."""
+        layer = _make_layer(position="bottom_center", margin=30)
+        x, y = compute_pip_position(layer, 300, 200, OUTPUT_W, OUTPUT_H)
+        assert x == (OUTPUT_W - 300) // 2
+        assert y == OUTPUT_H - 200 - 30
+
+    def test_center_left(self):
+        """左侧居中."""
+        layer = _make_layer(position="center_left", margin=15)
+        x, y = compute_pip_position(layer, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == 15
+        assert y == (OUTPUT_H - 100) // 2
+
+    def test_center_right(self):
+        """右侧居中."""
+        layer = _make_layer(position="center_right", margin=15)
+        x, y = compute_pip_position(layer, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == OUTPUT_W - 150 - 15
+        assert y == (OUTPUT_H - 100) // 2
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_pip_pre_filter
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildPipPreFilter:
+    """预处理滤镜构建测试."""
+
+    def test_basic_scale_setsar(self):
+        """基础：scale + setsar."""
+        layer = _make_layer()
+        result = build_pip_pre_filter("[1:v]", layer, 200, 150, "pip_pre_0")
+        assert result.startswith("[1:v]")
+        assert "scale=200:150" in result
+        assert "setsar=1" in result
+        assert result.endswith("[pip_pre_0]")
+
+    def test_corner_radius_filter(self):
+        """圆角裁剪滤镜."""
+        layer = _make_layer(corner_radius=20)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "geq=" in result
+        assert "format=yuva420p" in result
+        # 圆角半径应钳制到 min(r, w//2, h//2)
+        assert "hypot(" in result
+
+    def test_corner_radius_clamped(self):
+        """圆角半径超过尺寸一半时自动钳制."""
+        layer = _make_layer(corner_radius=1000)  # 超大
+        result = build_pip_pre_filter("[0:v]", layer, 100, 80, "pre")
+        # 钳制后 r = min(1000, 50, 40) = 40
+        # 检查 geq 表达式中的 r 值
+        import re
+
+        r_matches = re.findall(r"lt\(X,(\d+)\)\*lt\(Y,\1\)", result)
+        assert r_matches
+        assert int(r_matches[0]) <= 50  # 不超过宽的一半
+
+    def test_border_filter(self):
+        """边框滤镜."""
+        layer = _make_layer(border_width=5, border_color="red")
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "pad=210:160:5:5:red" in result
+
+    def test_zero_border_no_pad(self):
+        """border_width=0 时不加 pad."""
+        layer = _make_layer(border_width=0)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "pad=" not in result
+
+    def test_opacity_filter(self):
+        """透明度滤镜."""
+        layer = _make_layer(opacity=0.5)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "colorchannelmixer=aa=0.5" in result
+        assert "format=yuva420p" in result
+
+    def test_full_opacity_no_alpha(self):
+        """opacity=1.0 时不加透明度滤镜."""
+        layer = _make_layer(opacity=1.0)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "colorchannelmixer" not in result
+
+    def test_opacity_clamped_high(self):
+        """opacity > 1.0 时钳制."""
+        layer = _make_layer(opacity=2.0)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        # 钳制到 1.0，不加透明度滤镜
+        assert "colorchannelmixer=aa=1" not in result
+        assert "colorchannelmixer" not in result
+
+    def test_opacity_clamped_low(self):
+        """opacity < 0 时钳制到 0."""
+        layer = _make_layer(opacity=-0.5)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "colorchannelmixer=aa=0.0" in result
+
+    def test_fade_in_animation(self):
+        """淡入动画."""
+        layer = _make_layer(animation_in=ANIMATION_FADE, animation_duration=0.3)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "fade=t=in:st=0:d=0.3:alpha=1" in result
+
+    def test_fade_out_animation(self):
+        """淡出动画（需要 duration）."""
+        layer = _make_layer(
+            animation_out=ANIMATION_FADE,
+            animation_duration=0.5,
+            duration=5.0,
+        )
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "fade=t=out:st=4.5:d=0.5:alpha=1" in result
+
+    def test_fade_out_no_duration(self):
+        """淡出无 duration 时不加."""
+        layer = _make_layer(animation_out=ANIMATION_FADE, animation_duration=0.5, duration=None)
+        result = build_pip_pre_filter("[0:v]", layer, 200, 150, "pre")
+        assert "fade=t=out" not in result
+
+    def test_combined_effects(self):
+        """多个效果组合：圆角 + 边框 + 透明度."""
+        layer = _make_layer(
+            corner_radius=15,
+            border_width=3,
+            border_color="white",
+            opacity=0.8,
+        )
+        result = build_pip_pre_filter("[0:v]", layer, 300, 200, "pre")
+        assert "geq=" in result  # 圆角
+        assert "pad=306:206:3:3:white" in result  # 边框
+        assert "colorchannelmixer=aa=0.8" in result  # 透明度
+
+    def test_output_label(self):
+        """输出标签正确."""
+        layer = _make_layer()
+        result = build_pip_pre_filter("[2:v]", layer, 100, 80, "my_label")
+        assert result.endswith("[my_label]")
+
+    def test_input_label(self):
+        """输入标签正确."""
+        layer = _make_layer()
+        result = build_pip_pre_filter("[5:v]", layer, 100, 80, "out")
+        assert result.startswith("[5:v]")
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_animation_filters
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildAnimationFilters:
+    """动画滤镜构建测试."""
+
+    def test_no_animation(self):
+        """无动画返回空列表."""
+        layer = _make_layer()
+        result = build_animation_filters(layer, 200, 150)
+        assert result == []
+
+    def test_fade_in_only(self):
+        """仅淡入."""
+        layer = _make_layer(animation_in=ANIMATION_FADE, animation_duration=0.5)
+        result = build_animation_filters(layer, 200, 150)
+        assert len(result) == 1
+        assert "fade=t=in" in result[0]
+
+    def test_fade_out_with_duration(self):
+        """淡出（有 duration）."""
+        layer = _make_layer(
+            animation_out=ANIMATION_FADE,
+            animation_duration=0.3,
+            duration=10.0,
+        )
+        result = build_animation_filters(layer, 200, 150)
+        assert len(result) == 1
+        assert "fade=t=out:st=9.7:d=0.3" in result[0]
+
+    def test_fade_out_no_duration_skipped(self):
+        """淡出无 duration 时跳过."""
+        layer = _make_layer(animation_out=ANIMATION_FADE, animation_duration=0.5)
+        result = build_animation_filters(layer, 200, 150)
+        assert result == []
+
+    def test_fade_in_and_out(self):
+        """淡入 + 淡出."""
+        layer = _make_layer(
+            animation_in=ANIMATION_FADE,
+            animation_out=ANIMATION_FADE,
+            animation_duration=0.5,
+            duration=3.0,
+        )
+        result = build_animation_filters(layer, 200, 150)
+        assert len(result) == 2
+        assert any("fade=t=in" in f for f in result)
+        assert any("fade=t=out" in f for f in result)
+
+    def test_slide_in_not_here(self):
+        """slide 动画不在此函数处理."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_LEFT, animation_duration=0.5)
+        result = build_animation_filters(layer, 200, 150)
+        assert result == []
+
+    def test_zero_duration_no_animation(self):
+        """动画时长为 0 时不加."""
+        layer = _make_layer(animation_in=ANIMATION_FADE, animation_duration=0)
+        result = build_animation_filters(layer, 200, 150)
+        assert result == []
+
+    def test_negative_duration_clamped(self):
+        """负动画时长钳制为 0."""
+        layer = _make_layer(animation_in=ANIMATION_FADE, animation_duration=-1)
+        result = build_animation_filters(layer, 200, 150)
+        assert result == []
+
+    def test_fade_out_start_clamped_to_zero(self):
+        """淡出开始时间不为负."""
+        layer = _make_layer(
+            animation_out=ANIMATION_FADE,
+            animation_duration=2.0,
+            duration=1.0,  # 比动画时长短
+        )
+        result = build_animation_filters(layer, 200, 150)
+        assert len(result) == 1
+        # start = max(0, 1.0 - 2.0) = 0
+        assert "st=0.0:d=2.0" in result[0]
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_overlay_expr
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildOverlayExpr:
+    """overlay 表达式构建测试."""
+
+    def test_no_animation_static_position(self):
+        """无动画时返回静态坐标."""
+        layer = _make_layer()
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert y == "200"
+
+    def test_slide_in_from_left(self):
+        """从左侧滑入."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_LEFT, animation_duration=0.5)
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert "if(lt(t,0.5)" in x
+        assert "-150" in x  # 起始位置 = -pip_width
+        assert y == "200"  # y 不变
+
+    def test_slide_in_from_right(self):
+        """从右侧滑入."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_RIGHT, animation_duration=0.5)
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert str(OUTPUT_W) in x
+        assert y == "200"
+
+    def test_slide_in_from_top(self):
+        """从顶部滑入."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_TOP, animation_duration=0.3)
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert "if(lt(t,0.3)" in y
+        assert "-100" in y
+
+    def test_slide_in_from_bottom(self):
+        """从底部滑入."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_BOTTOM, animation_duration=0.3)
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert str(OUTPUT_H) in y
+
+    def test_slide_out_to_left(self):
+        """向左滑出."""
+        layer = _make_layer(
+            animation_out=ANIMATION_SLIDE_LEFT,
+            animation_duration=0.5,
+            duration=3.0,
+        )
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert "gt(t,2.5)" in x
+        assert y == "200"
+
+    def test_slide_out_to_right(self):
+        """向右滑出."""
+        layer = _make_layer(
+            animation_out=ANIMATION_SLIDE_RIGHT,
+            animation_duration=0.5,
+            duration=3.0,
+        )
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert "gt(t,2.5)" in x
+        assert y == "200"
+        # 向右滑出：结束时 x > base_x（值变大）
+        # 检查表达式中含增大方向的计算
+        assert "+(t-2.5)/0.5*" in x
+
+    def test_slide_out_to_top(self):
+        """向上滑出."""
+        layer = _make_layer(
+            animation_out=ANIMATION_SLIDE_TOP,
+            animation_duration=0.5,
+            duration=5.0,
+        )
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert "gt(t,4.5)" in y
+
+    def test_slide_out_to_bottom(self):
+        """向下滑出."""
+        layer = _make_layer(
+            animation_out=ANIMATION_SLIDE_BOTTOM,
+            animation_duration=0.5,
+            duration=5.0,
+        )
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert "gt(t,4.5)" in y
+        # 向下滑出：y 值增大
+        assert "+(t-4.5)/0.5*" in y
+
+    def test_slide_in_and_out_different_axes(self):
+        """滑入（x方向） + 滑出（y方向），两个轴都有动画."""
+        layer = _make_layer(
+            animation_in=ANIMATION_SLIDE_LEFT,
+            animation_out=ANIMATION_SLIDE_BOTTOM,
+            animation_duration=0.5,
+            duration=4.0,
+        )
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert "lt(t,0.5)" in x  # x 方向入场
+        assert "gt(t,3.5)" in y  # y 方向出场
+
+    def test_zero_animation_duration_no_effect(self):
+        """动画时长为 0 时无效果."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_LEFT, animation_duration=0)
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert y == "200"
+
+    def test_no_duration_skip_outro(self):
+        """无 duration 时跳过滑出."""
+        layer = _make_layer(
+            animation_out=ANIMATION_SLIDE_LEFT,
+            animation_duration=0.5,
+            duration=None,
+        )
+        x, y = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x == "100"
+        assert y == "200"
+
+    def test_expression_format_quoted(self):
+        """有动画时表达式带单引号."""
+        layer = _make_layer(animation_in=ANIMATION_SLIDE_LEFT, animation_duration=0.5)
+        x, _ = build_overlay_expr(layer, 100, 200, 150, 100, OUTPUT_W, OUTPUT_H)
+        assert x.startswith("'")
+        assert x.endswith("'")
+
+    def test_static_position_unquoted(self):
+        """无动画时纯数字，不带引号."""
+        layer = _make_layer()
+        x, y = build_overlay_expr(layer, 50, 60, 100, 80, OUTPUT_W, OUTPUT_H)
+        assert x == "50"
+        assert y == "60"
+        assert "'" not in x
+        assert "'" not in y
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_enable_expr
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildEnableExpr:
+    """enable 表达式构建测试."""
+
+    def test_no_time_restriction(self):
+        """无时间限制返回空."""
+        layer = _make_layer()
+        assert build_enable_expr(layer) == ""
+
+    def test_start_time_only(self):
+        """只有开始时间."""
+        layer = _make_layer(start_time=5.0)
+        result = build_enable_expr(layer)
+        assert result == ":enable='gte(t,5.0)'"
+
+    def test_duration_only(self):
+        """只有 duration（从 0 开始）."""
+        layer = _make_layer(duration=10.0)
+        result = build_enable_expr(layer)
+        assert result == ":enable='between(t,0.0,10.0)'"
+
+    def test_start_and_duration(self):
+        """开始时间 + 时长."""
+        layer = _make_layer(start_time=2.0, duration=5.0)
+        result = build_enable_expr(layer)
+        assert "between(t,2.0,7.0)" in result
+
+    def test_zero_start_with_duration(self):
+        """0 开始 + 时长."""
+        layer = _make_layer(start_time=0, duration=3.5)
+        result = build_enable_expr(layer)
+        assert "between(t,0.0,3.5)" in result
+
+    def test_negative_start_clamped(self):
+        """负开始时间钳制为 0."""
+        layer = _make_layer(start_time=-1.0, duration=5.0)
+        result = build_enable_expr(layer)
+        assert "between(t,0.0,5.0)" in result
+
+    def test_none_duration(self):
+        """duration=None 视为无限."""
+        layer = _make_layer(start_time=3.0, duration=None)
+        result = build_enable_expr(layer)
+        assert "gte(t,3.0)" in result
+        assert "between" not in result
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# build_pip_filters
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestBuildPipFilters:
+    """完整滤镜链构建测试."""
+
+    def test_empty_layers(self):
+        """空图层列表返回空."""
+        filters, inputs, label = build_pip_filters(
+            "base",
+            [],
+            [],
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+        assert filters == []
+        assert inputs == []
+        assert label == "base"
+
+    def test_single_layer(self):
+        """单个图层."""
+        layer = _make_layer(width="20%", position="bottom_right")
+        path = Path("/tmp/clip1.mp4")
+
+        filters, inputs, label = build_pip_filters(
+            "v0",
+            [layer],
+            [path],
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+
+        # 2 个滤镜片段：预处理 + overlay
+        assert len(filters) == 2
+        # 1 个输入
+        assert inputs == ["-i", str(path)]
+        # 最终标签
+        assert label == "pip_combined_0"
+
+    def test_multiple_layers(self):
+        """多个图层."""
+        layers = [
+            _make_layer(width="30%", position="bottom_left"),
+            _make_layer(width="25%", position="top_right"),
+            _make_layer(width="20%", position="top_left"),
+        ]
+        paths = [Path("/tmp/a.mp4"), Path("/tmp/b.mp4"), Path("/tmp/c.mp4")]
+
+        filters, inputs, label = build_pip_filters(
+            "base",
+            layers,
+            paths,
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+
+        # 每个图层 2 个滤镜（预处理 + overlay）
+        assert len(filters) == 6
+        # 3 个输入
+        assert len(inputs) == 6  # -i path × 3
+        assert inputs[0::2] == ["-i", "-i", "-i"]
+        # 最终标签是最后一个 combined
+        assert label == "pip_combined_2"
+
+    def test_base_input_idx_offset(self):
+        """base_input_idx 偏移."""
+        layer = _make_layer(width="20%")
+        filters, inputs, label = build_pip_filters(
+            "base",
+            [layer],
+            [Path("/tmp/x.mp4")],
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+            base_input_idx=5,
+        )
+        # 预处理滤镜引用 [5:v]
+        assert "[5:v]" in filters[0]
+
+    def test_layer_count_mismatch_raises(self):
+        """图层和路径数量不一致时报错."""
+        with pytest.raises(ValueError, match="长度不一致"):
+            build_pip_filters(
+                "base",
+                [_make_layer()],
+                [],
+                output_width=OUTPUT_W,
+                output_height=OUTPUT_H,
+            )
+
+    def test_filter_chaining(self):
+        """多图层时滤镜链正确串联."""
+        layers = [_make_layer(width="10%"), _make_layer(width="10%")]
+        paths = [Path("/tmp/1.mp4"), Path("/tmp/2.mp4")]
+
+        filters, _, _ = build_pip_filters(
+            "base",
+            layers,
+            paths,
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+
+        # 第一个 overlay 的输入是 base + pip_pre_0
+        # 输出是 pip_combined_0
+        assert "[base]" in filters[1]
+        assert "[pip_combined_0]" in filters[1]
+
+        # 第二个 overlay 的输入是 pip_combined_0 + pip_pre_1
+        # 输出是 pip_combined_1
+        assert "[pip_combined_0]" in filters[3]
+        assert "[pip_combined_1]" in filters[3]
+
+    def test_with_animation_layer(self):
+        """带动画的图层生成正确表达式."""
+        layer = _make_layer(
+            width="30%",
+            animation_in=ANIMATION_SLIDE_BOTTOM,
+            animation_duration=0.5,
+        )
+        filters, inputs, _ = build_pip_filters(
+            "v0",
+            [layer],
+            [Path("/tmp/a.mp4")],
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+        # overlay 滤镜中包含滑动表达式
+        overlay_filter = filters[1]
+        assert "overlay=" in overlay_filter
+        assert str(OUTPUT_H) in overlay_filter  # 从底部滑入
+
+    def test_with_enable_time(self):
+        """带时间控制的图层."""
+        layer = _make_layer(width="20%", start_time=2.0, duration=5.0)
+        filters, _, _ = build_pip_filters(
+            "v0",
+            [layer],
+            [Path("/tmp/a.mp4")],
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+        overlay_filter = filters[1]
+        assert "enable=" in overlay_filter
+        assert "between" in overlay_filter
+
+    def test_string_paths(self):
+        """路径可以是字符串."""
+        layer = _make_layer(width="10%")
+        filters, inputs, label = build_pip_filters(
+            "v0",
+            [layer],
+            ["/tmp/s.mp4"],
+            output_width=OUTPUT_W,
+            output_height=OUTPUT_H,
+        )
+        assert inputs == ["-i", "/tmp/s.mp4"]
+        assert len(filters) == 2
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# validate_pip_layer
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestValidatePipLayer:
+    """配置验证测试."""
+
+    def test_valid_layer(self):
+        """合法配置."""
+        layer = _make_layer()
+        ok, err = validate_pip_layer(layer)
+        assert ok is True
+        assert err == ""
+
+    def test_empty_source_type(self):
+        """空 source_type."""
+        layer = _make_layer(source_type="")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "source_type" in err
+
+    def test_invalid_source_type(self):
+        """不支持的 source_type."""
+        layer = _make_layer(source_type="ftp")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "source_type" in err
+
+    def test_empty_source(self):
+        """空 source."""
+        layer = _make_layer(source="")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "source" in err
+
+    def test_invalid_position(self):
+        """不支持的 position."""
+        layer = _make_layer(position="middle")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "position" in err
+
+    def test_opacity_too_high(self):
+        """opacity > 1."""
+        layer = _make_layer(opacity=1.5)
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "opacity" in err
+
+    def test_opacity_negative(self):
+        """opacity < 0."""
+        layer = _make_layer(opacity=-0.1)
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "opacity" in err
+
+    def test_negative_corner_radius(self):
+        """负圆角."""
+        layer = _make_layer(corner_radius=-5)
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "corner_radius" in err
+
+    def test_negative_border_width(self):
+        """负边框."""
+        layer = _make_layer(border_width=-2)
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "border_width" in err
+
+    def test_negative_start_time(self):
+        """负开始时间."""
+        layer = _make_layer(start_time=-1.0)
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "start_time" in err
+
+    def test_negative_duration(self):
+        """负时长."""
+        layer = _make_layer(duration=-5.0)
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "duration" in err
+
+    def test_invalid_animation_in(self):
+        """不支持的入场动画."""
+        layer = _make_layer(animation_in="zoom")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "animation_in" in err
+
+    def test_invalid_animation_out(self):
+        """不支持的出场动画."""
+        layer = _make_layer(animation_out="spin")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert "animation_out" in err
+
+    def test_multiple_errors_combined(self):
+        """多个错误合并."""
+        layer = _make_layer(source_type="", source="", opacity=2.0, position="xxx")
+        ok, err = validate_pip_layer(layer)
+        assert ok is False
+        assert err.count(";") >= 2  # 至少 2 个错误
+
+    def test_valid_url_source(self):
+        """URL 类型 source 合法."""
+        layer = _make_layer(source_type="url", source="https://example.com/v.mp4")
+        ok, err = validate_pip_layer(layer)
+        assert ok is True
+
+    def test_valid_asset_id(self):
+        """asset_id 类型合法."""
+        layer = _make_layer(source_type="asset_id", source="asset_123")
+        ok, err = validate_pip_layer(layer)
+        assert ok is True
+
+    def test_zero_values_valid(self):
+        """0 值合法（不是负数）."""
+        layer = _make_layer(
+            corner_radius=0,
+            border_width=0,
+            start_time=0,
+            animation_duration=0,
+        )
+        ok, err = validate_pip_layer(layer)
+        assert ok is True
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# count_visible_layers
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestCountVisibleLayers:
+    """可见图层统计测试."""
+
+    def test_all_visible(self):
+        """全部可见."""
+        layers = [_make_layer(opacity=1.0), _make_layer(opacity=0.5)]
+        assert count_visible_layers(layers) == 2
+
+    def test_all_invisible(self):
+        """全部不可见."""
+        layers = [_make_layer(opacity=0.0), _make_layer(opacity=0.0)]
+        assert count_visible_layers(layers) == 0
+
+    def test_mixed(self):
+        """混合."""
+        layers = [
+            _make_layer(opacity=1.0),
+            _make_layer(opacity=0.0),
+            _make_layer(opacity=0.001),
+        ]
+        assert count_visible_layers(layers) == 2
+
+    def test_empty_list(self):
+        """空列表."""
+        assert count_visible_layers([]) == 0
+
+
+# ═══════════════════════════════════════════════════════════════════════════════
+# sort_layers_by_z_index
+# ═══════════════════════════════════════════════════════════════════════════════
+
+
+class TestSortLayersByZIndex:
+    """图层排序测试."""
+
+    def test_sorted_by_z_index(self):
+        """按 z_index 从小到大排序."""
+        layers = [
+            _make_layer(z_index=5, source="/tmp/a.mp4"),
+            _make_layer(z_index=1, source="/tmp/b.mp4"),
+            _make_layer(z_index=3, source="/tmp/c.mp4"),
+        ]
+        sorted_layers = sort_layers_by_z_index(layers)
+        assert [l.z_index for l in sorted_layers] == [1, 3, 5]
+
+    def test_same_z_index_stable(self):
+        """相同 z_index 保持相对顺序."""
+        layers = [
+            _make_layer(z_index=2, source="/tmp/1.mp4"),
+            _make_layer(z_index=2, source="/tmp/2.mp4"),
+        ]
+        sorted_layers = sort_layers_by_z_index(layers)
+        assert sorted_layers[0].source == "/tmp/1.mp4"
+        assert sorted_layers[1].source == "/tmp/2.mp4"
+
+    def test_empty_list(self):
+        """空列表."""
+        assert sort_layers_by_z_index([]) == []
+
+    def test_single_layer(self):
+        """单个图层."""
+        layers = [_make_layer(z_index=0)]
+        assert len(sort_layers_by_z_index(layers)) == 1
+
+    def test_negative_z_index(self):
+        """负 z_index."""
+        layers = [
+            _make_layer(z_index=0, source="/tmp/0.mp4"),
+            _make_layer(z_index=-5, source="/tmp/-5.mp4"),
+            _make_layer(z_index=3, source="/tmp/3.mp4"),
+        ]
+        sorted_layers = sort_layers_by_z_index(layers)
+        assert [l.z_index for l in sorted_layers] == [-5, 0, 3]
@@ -0,0 +1,780 @@
+"""贴纸引擎纯逻辑单元测试."""
+
+from __future__ import annotations
+
+import pytest
+from video_processing.sticker_engine_pure import (
+    build_drawtext_alpha_expr,
+    build_enable_expr,
+    build_image_fade_filters,
+    build_opacity_filter,
+    build_overlay_position,
+    build_pre_filter_label,
+    build_scale_filter,
+    build_shadow_params,
+    build_stroke_params,
+    calculate_end_time,
+    calculate_fade_out_start,
+    count_sticker_types,
+    escape_drawtext_text,
+    estimate_sticker_size,
+    estimate_text_size,
+    filter_enabled_stickers,
+    has_time_range,
+    safe_bool,
+    safe_float,
+    safe_int,
+    sort_stickers_by_z_index,
+    validate_image_sticker,
+    validate_text_sticker,
+)
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 安全类型转换测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestSafeFloat:
+    """safe_float 测试."""
+
+    def test_int_input(self):
+        """整数输入."""
+        assert safe_float(42) == 42.0
+
+    def test_float_input(self):
+        """浮点数输入."""
+        assert safe_float(3.14) == 3.14
+
+    def test_string_number(self):
+        """字符串数字."""
+        assert safe_float("3.14") == 3.14
+
+    def test_string_int(self):
+        """字符串整数."""
+        assert safe_float("100") == 100.0
+
+    def test_none_input(self):
+        """None 输入."""
+        assert safe_float(None) is None
+
+    def test_invalid_string(self):
+        """无效字符串."""
+        assert safe_float("abc") is None
+
+    def test_empty_string(self):
+        """空字符串."""
+        assert safe_float("") is None
+
+    def test_zero(self):
+        """零值."""
+        assert safe_float(0) == 0.0
+
+    def test_negative(self):
+        """负值."""
+        assert safe_float(-5.5) == -5.5
+
+
+class TestSafeInt:
+    """safe_int 测试."""
+
+    def test_int_input(self):
+        """整数输入."""
+        assert safe_int(42) == 42
+
+    def test_float_input(self):
+        """浮点数输入（截断）."""
+        assert safe_int(3.7) == 3
+
+    def test_string_number(self):
+        """字符串数字."""
+        assert safe_int("42") == 42
+
+    def test_none_input(self):
+        """None 输入用默认值."""
+        assert safe_int(None) == 0
+
+    def test_none_custom_default(self):
+        """None 输入自定义默认值."""
+        assert safe_int(None, default=10) == 10
+
+    def test_invalid_string(self):
+        """无效字符串."""
+        assert safe_int("abc") == 0
+
+    def test_negative(self):
+        """负值."""
+        assert safe_int(-5) == -5
+
+    def test_zero(self):
+        """零值."""
+        assert safe_int(0) == 0
+
+
+class TestSafeBool:
+    """safe_bool 测试."""
+
+    def test_true_bool(self):
+        """True."""
+        assert safe_bool(True) is True
+
+    def test_false_bool(self):
+        """False."""
+        assert safe_bool(False) is False
+
+    def test_none(self):
+        """None -> False."""
+        assert safe_bool(None) is False
+
+    def test_string_true(self):
+        """字符串 true."""
+        assert safe_bool("true") is True
+
+    def test_string_yes(self):
+        """字符串 yes."""
+        assert safe_bool("yes") is True
+
+    def test_string_one(self):
+        """字符串 1."""
+        assert safe_bool("1") is True
+
+    def test_string_false(self):
+        """字符串 false."""
+        assert safe_bool("false") is False
+
+    def test_int_one(self):
+        """整数 1 -> True."""
+        assert safe_bool(1) is True
+
+    def test_int_zero(self):
+        """整数 0 -> False."""
+        assert safe_bool(0) is False
+
+    def test_empty_list(self):
+        """空列表 -> False."""
+        assert safe_bool([]) is False
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 尺寸估算测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestEstimateStickerSize:
+    """贴纸尺寸估算测试."""
+
+    def test_default_scale(self):
+        """默认 scale=1.0."""
+        w, h = estimate_sticker_size(1000, 1000)
+        assert w == 300  # 1000 * 0.3 * 1.0
+        assert h == 300
+
+    def test_custom_scale(self):
+        """自定义缩放."""
+        w, h = estimate_sticker_size(1000, 1000, scale=0.5)
+        assert w == 150
+        assert h == 150
+
+    def test_fixed_width_height(self):
+        """固定宽高."""
+        w, h = estimate_sticker_size(1000, 1000, fixed_width=200, fixed_height=100)
+        assert w == 200
+        assert h == 100
+
+    def test_scale_2x(self):
+        """2倍缩放."""
+        w, h = estimate_sticker_size(800, 600, scale=2.0)
+        assert w == 480  # 800 * 0.3 * 2
+        assert h == 360  # 600 * 0.3 * 2
+
+    def test_zero_canvas(self):
+        """零画布尺寸，返回最小 1."""
+        w, h = estimate_sticker_size(0, 0)
+        assert w >= 1
+        assert h >= 1
+
+
+class TestEstimateTextSize:
+    """文字尺寸估算测试."""
+
+    def test_normal_text(self):
+        """普通文字."""
+        w, h = estimate_text_size("Hello", 36)
+        assert w == int(5 * 36 * 0.6)
+        assert h == int(36 * 1.4)
+
+    def test_empty_text(self):
+        """空文字."""
+        w, h = estimate_text_size("", 36)
+        assert w == 0
+        assert h == 0
+
+    def test_large_font(self):
+        """大字号."""
+        w, h = estimate_text_size("A", 72)
+        assert w == int(1 * 72 * 0.6)
+        assert h == int(72 * 1.4)
+
+    def test_chinese_chars(self):
+        """中文字符."""
+        w, h = estimate_text_size("你好世界", 48)
+        assert w == int(4 * 48 * 0.6)
+        assert h == int(48 * 1.4)
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 时间计算测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestCalculateFadeOutStart:
+    """淡出开始时间计算测试."""
+
+    def test_normal_case(self):
+        """正常情况."""
+        assert calculate_fade_out_start(10, 30, 2) == pytest.approx(38.0)
+
+    def test_no_fade_out(self):
+        """无淡出."""
+        assert calculate_fade_out_start(10, 30, 0) == 0.0
+
+    def test_negative_fade_out(self):
+        """负淡出."""
+        assert calculate_fade_out_start(10, 30, -1) == 0.0
+
+    def test_zero_duration(self):
+        """零时长."""
+        assert calculate_fade_out_start(10, 0, 2) == 0.0
+
+    def test_fade_out_longer_than_duration(self):
+        """淡出超过时长，返回 0."""
+        # start=10, dur=5, fade=10 -> 10+5-10 = 5 > 0
+        assert calculate_fade_out_start(10, 5, 10) == pytest.approx(5.0)
+
+    def test_fade_out_starts_before_zero(self):
+        """淡出开始时间在 0 之前，钳制到 0."""
+        # start=0, dur=3, fade=5 -> 0+3-5 = -2 -> 0
+        assert calculate_fade_out_start(0, 3, 5) == 0.0
+
+
+class TestCalculateEndTime:
+    """结束时间计算测试."""
+
+    def test_normal_case(self):
+        """正常情况."""
+        assert calculate_end_time(10, 30) == 40.0
+
+    def test_zero_duration(self):
+        """零时长."""
+        assert calculate_end_time(10, 0) == 10.0
+
+    def test_negative_duration(self):
+        """负时长."""
+        assert calculate_end_time(10, -5) == 10.0
+
+    def test_zero_start(self):
+        """零开始."""
+        assert calculate_end_time(0, 100) == 100.0
+
+
+class TestHasTimeRange:
+    """时间范围判断测试."""
+
+    def test_positive_duration(self):
+        """正时长."""
+        assert has_time_range(30) is True
+
+    def test_zero_duration(self):
+        """零时长."""
+        assert has_time_range(0) is False
+
+    def test_negative_duration(self):
+        """负时长."""
+        assert has_time_range(-5) is False
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 滤镜构建测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildScaleFilter:
+    """缩放滤镜构建测试."""
+
+    def test_fixed_width_height(self):
+        """固定宽高."""
+        result = build_scale_filter(width=200, height=100)
+        assert result == "scale=200:100"
+
+    def test_scale_only(self):
+        """仅缩放."""
+        result = build_scale_filter(scale=0.5)
+        assert result == "scale=iw*0.5:ih*0.5"
+
+    def test_no_scaling_needed(self):
+        """无需缩放."""
+        result = build_scale_filter(scale=1.0)
+        assert result is None
+
+    def test_scale_2x(self):
+        """2倍缩放."""
+        result = build_scale_filter(scale=2.0)
+        assert result == "scale=iw*2.0:ih*2.0"
+
+    def test_fixed_overrides_scale(self):
+        """固定宽高优先于 scale."""
+        result = build_scale_filter(width=100, height=50, scale=0.5)
+        assert result == "scale=100:50"
+
+
+class TestBuildOpacityFilter:
+    """透明度滤镜构建测试."""
+
+    def test_partial_opacity(self):
+        """部分透明."""
+        result = build_opacity_filter(0.5)
+        assert result == "colorchannelmixer=aa=0.5"
+
+    def test_fully_opaque(self):
+        """完全不透明."""
+        result = build_opacity_filter(1.0)
+        assert result is None
+
+    def test_fully_transparent(self):
+        """完全透明."""
+        result = build_opacity_filter(0.0)
+        assert result == "colorchannelmixer=aa=0.0"
+
+    def test_opacity_above_1_clamped(self):
+        """超过 1 被钳制."""
+        result = build_opacity_filter(1.5)
+        assert result is None
+
+    def test_opacity_below_0_clamped(self):
+        """低于 0 被钳制."""
+        result = build_opacity_filter(-0.5)
+        assert result == "colorchannelmixer=aa=0.0"
+
+
+class TestBuildImageFadeFilters:
+    """图片淡入淡出滤镜测试."""
+
+    def test_fade_in_only(self):
+        """仅淡入."""
+        result = build_image_fade_filters(10, 30, fade_in=1.0)
+        assert len(result) == 1
+        assert "fade=in:st=10:d=1.0:alpha=1" in result[0]
+
+    def test_fade_out_only(self):
+        """仅淡出."""
+        result = build_image_fade_filters(10, 30, fade_out=2.0)
+        assert len(result) == 1
+        assert "fade=out" in result[0]
+        assert "st=38.0" in result[0]  # 10 + 30 - 2 = 38
+
+    def test_fade_in_and_out(self):
+        """淡入+淡出."""
+        result = build_image_fade_filters(0, 10, fade_in=1.0, fade_out=1.0)
+        assert len(result) == 2
+        assert "fade=in" in result[0]
+        assert "fade=out" in result[1]
+
+    def test_no_fade(self):
+        """无淡入淡出."""
+        result = build_image_fade_filters(10, 30)
+        assert len(result) == 0
+
+    def test_zero_duration_no_fade_out(self):
+        """零时长不生成淡出."""
+        result = build_image_fade_filters(10, 0, fade_out=1.0)
+        assert len(result) == 0
+
+
+class TestBuildEnableExpr:
+    """enable 表达式构建测试."""
+
+    def test_normal_duration(self):
+        """正常时长."""
+        result = build_enable_expr(10, 30)
+        assert "between(t,10,40" in result
+        assert "enable" in result
+
+    def test_zero_duration(self):
+        """零时长返回空."""
+        result = build_enable_expr(10, 0)
+        assert result == ""
+
+    def test_negative_duration(self):
+        """负时长返回空."""
+        result = build_enable_expr(10, -5)
+        assert result == ""
+
+    def test_zero_start(self):
+        """从零开始."""
+        result = build_enable_expr(0, 100)
+        assert "t,0,100" in result
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# drawtext 相关测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestEscapeDrawtextText:
+    """文字转义测试."""
+
+    def test_no_special_chars(self):
+        """无特殊字符."""
+        assert escape_drawtext_text("Hello") == "Hello"
+
+    def test_colon_escaped(self):
+        """冒号转义."""
+        assert escape_drawtext_text("a:b") == "a\\:b"
+
+    def test_quote_escaped(self):
+        """单引号转义."""
+        assert escape_drawtext_text("it's") == "it\\'s"
+
+    def test_multiple_special_chars(self):
+        """多个特殊字符."""
+        assert escape_drawtext_text("a:b:c'd") == "a\\:b\\:c\\'d"
+
+    def test_empty_string(self):
+        """空字符串."""
+        assert escape_drawtext_text("") == ""
+
+
+class TestBuildDrawtextAlphaExpr:
+    """drawtext alpha 表达式测试."""
+
+    def test_no_fade(self):
+        """无淡入淡出."""
+        assert build_drawtext_alpha_expr(10, 30) == "1"
+
+    def test_fade_in_only(self):
+        """仅淡入."""
+        result = build_drawtext_alpha_expr(10, 30, fade_in=2.0)
+        assert "if(lt(t,12.0)" in result
+        assert "(t-10)/2.0" in result
+
+    def test_fade_out_only(self):
+        """仅淡出."""
+        result = build_drawtext_alpha_expr(10, 30, fade_out=3.0)
+        assert "if(gt(t,37" in result
+        assert "-t)/3.0" in result
+
+    def test_fade_in_and_out(self):
+        """淡入+淡出（相乘）."""
+        result = build_drawtext_alpha_expr(0, 10, fade_in=1.0, fade_out=1.0)
+        assert "*" in result
+        assert result.count("if(") == 2
+
+    def test_zero_duration_no_fade_out(self):
+        """零时长不生成淡出."""
+        result = build_drawtext_alpha_expr(10, 0, fade_out=1.0)
+        assert result == "1"
+
+
+class TestBuildStrokeParams:
+    """描边参数测试."""
+
+    def test_no_stroke(self):
+        """无描边."""
+        result = build_stroke_params(0)
+        assert len(result) == 0
+
+    def test_with_stroke(self):
+        """有描边."""
+        result = build_stroke_params(2, "red")
+        assert len(result) == 2
+        assert "borderw=2" in result
+        assert "bordercolor=red" in result
+
+    def test_negative_width(self):
+        """负宽度."""
+        result = build_stroke_params(-1)
+        assert len(result) == 0
+
+
+class TestBuildShadowParams:
+    """阴影参数测试."""
+
+    def test_no_shadow(self):
+        """无阴影."""
+        result = build_shadow_params(0)
+        assert len(result) == 0
+
+    def test_with_shadow(self):
+        """有阴影."""
+        result = build_shadow_params(0.5, 3, 4, "black")
+        assert len(result) == 3
+        assert "shadowx=3" in result
+        assert "shadowy=4" in result
+        assert "shadowcolor=black@0.5" in result
+
+    def test_shadow_alpha_clamped(self):
+        """透明度钳制."""
+        result = build_shadow_params(1.5)
+        assert "shadowcolor=black@1.0" in result[2]
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 贴纸排序与过滤测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestSortStickersByZIndex:
+    """贴纸排序测试."""
+
+    def test_sorted_by_z_index(self):
+        """按 z_index 排序."""
+        stickers = [
+            {"z_index": 20, "name": "top"},
+            {"z_index": 5, "name": "bottom"},
+            {"z_index": 10, "name": "middle"},
+        ]
+        result = sort_stickers_by_z_index(stickers)
+        assert result[0]["name"] == "bottom"
+        assert result[1]["name"] == "middle"
+        assert result[2]["name"] == "top"
+
+    def test_same_z_index_preserves_order(self):
+        """相同 z_index 保持原顺序."""
+        stickers = [
+            {"z_index": 10, "name": "first"},
+            {"z_index": 10, "name": "second"},
+        ]
+        result = sort_stickers_by_z_index(stickers)
+        assert result[0]["name"] == "first"
+        assert result[1]["name"] == "second"
+
+    def test_empty_list(self):
+        """空列表."""
+        assert sort_stickers_by_z_index([]) == []
+
+    def test_default_z_index_10(self):
+        """无 z_index 默认 10."""
+        stickers = [
+            {"z_index": 5, "name": "low"},
+            {"name": "default"},
+        ]
+        result = sort_stickers_by_z_index(stickers)
+        assert result[0]["name"] == "low"
+        assert result[1]["name"] == "default"
+
+
+class TestFilterEnabledStickers:
+    """启用贴纸过滤测试."""
+
+    def test_all_enabled(self):
+        """全部启用."""
+        stickers = [{"enabled": True}, {"enabled": True}]
+        assert len(filter_enabled_stickers(stickers)) == 2
+
+    def test_mixed(self):
+        """混合."""
+        stickers = [
+            {"enabled": True, "name": "a"},
+            {"enabled": False, "name": "b"},
+            {"enabled": True, "name": "c"},
+        ]
+        result = filter_enabled_stickers(stickers)
+        assert len(result) == 2
+        assert result[0]["name"] == "a"
+
+    def test_default_enabled(self):
+        """默认启用."""
+        stickers = [{"name": "a"}]
+        result = filter_enabled_stickers(stickers)
+        assert len(result) == 1
+
+    def test_empty_list(self):
+        """空列表."""
+        assert filter_enabled_stickers([]) == []
+
+
+class TestCountStickerTypes:
+    """贴纸类型统计测试."""
+
+    def test_mixed_types(self):
+        """混合类型."""
+        stickers = [
+            {"type": "image"},
+            {"type": "text"},
+            {"type": "image"},
+        ]
+        counts = count_sticker_types(stickers)
+        assert counts["image"] == 2
+        assert counts["text"] == 1
+
+    def test_default_type(self):
+        """默认 image."""
+        stickers = [{}]
+        counts = count_sticker_types(stickers)
+        assert counts["image"] == 1
+
+    def test_empty_list(self):
+        """空列表."""
+        assert count_sticker_types([]) == {}
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# overlay 相关测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestBuildOverlayPosition:
+    """overlay 位置构建测试."""
+
+    def test_integer_position(self):
+        """整数位置."""
+        assert build_overlay_position(100, 200) == "100:200"
+
+    def test_float_position_rounded(self):
+        """浮点取整."""
+        assert build_overlay_position(100.6, 200.4) == "101:200"
+
+    def test_zero_position(self):
+        """零位置."""
+        assert build_overlay_position(0, 0) == "0:0"
+
+    def test_negative_position(self):
+        """负位置."""
+        assert build_overlay_position(-10, -20) == "-10:-20"
+
+
+class TestBuildPreFilterLabel:
+    """预处理标签构建测试."""
+
+    def test_normal_idx(self):
+        """正常索引."""
+        assert build_pre_filter_label(3) == "sticker_3_scaled"
+
+    def test_zero_idx(self):
+        """零索引."""
+        assert build_pre_filter_label(0) == "sticker_0_scaled"
+
+
+# ─────────────────────────────────────────────────────────────────────────────
+# 验证函数测试
+# ─────────────────────────────────────────────────────────────────────────────
+
+
+class TestValidateImageSticker:
+    """图片贴纸验证测试."""
+
+    def test_valid_with_image_path(self):
+        """有 image_path，合法."""
+        ok, errors = validate_image_sticker({"image_path": "/a.png"})
+        assert ok is True
+        assert len(errors) == 0
+
+    def test_valid_with_asset_id(self):
+        """有 asset_id，合法."""
+        ok, errors = validate_image_sticker({"asset_id": "123"})
+        assert ok is True
+
+    def test_missing_image_source(self):
+        """缺图片来源."""
+        ok, errors = validate_image_sticker({})
+        assert ok is False
+        assert any("image_path" in e or "asset_id" in e for e in errors)
+
+    def test_opacity_out_of_range(self):
+        """透明度超范围."""
+        ok, errors = validate_image_sticker(
+            {
+                "image_path": "/a.png",
+                "opacity": 1.5,
+            }
+        )
+        assert ok is False
+        assert any("opacity" in e for e in errors)
+
+    def test_negative_scale(self):
+        """负缩放."""
+        ok, errors = validate_image_sticker(
+            {
+                "image_path": "/a.png",
+                "scale": -0.5,
+            }
+        )
+        assert ok is False
+        assert any("scale" in e for e in errors)
+
+    def test_negative_duration(self):
+        """负时长."""
+        ok, errors = validate_image_sticker(
+            {
+                "image_path": "/a.png",
+                "duration": -10,
+            }
+        )
+        assert ok is False
+        assert any("duration" in e for e in errors)
+
+    def test_multiple_errors(self):
+        """多个错误."""
+        ok, errors = validate_image_sticker(
+            {
+                "opacity": 1.5,
+                "duration": -1,
+                "start_time": -5,
+            }
+        )
+        assert ok is False
+        assert len(errors) >= 3
+
+
+class TestValidateTextSticker:
+    """文字贴纸验证测试."""
+
+    def test_valid(self):
+        """合法配置."""
+        ok, errors = validate_text_sticker(
+            {
+                "text": "Hello",
+                "font_size": 36,
+                "font_color": "white",
+            }
+        )
+        assert ok is True
+        assert len(errors) == 0
+
+    def test_empty_text(self):
+        """空文字."""
+        ok, errors = validate_text_sticker({"text": ""})
+        assert ok is False
+        assert any("text" in e for e in errors)
+
+    def test_zero_font_size(self):
+        """零字号."""
+        ok, errors = validate_text_sticker(
+            {
+                "text": "Hi",
+                "font_size": 0,
+            }
+        )
+        assert ok is False
+        assert any("font_size" in e for e in errors)
+
+    def test_empty_font_color(self):
+        """空颜色."""
+        ok, errors = validate_text_sticker(
+            {
+                "text": "Hi",
+                "font_color": "",
+            }
+        )
+        assert ok is False
+        assert any("font_color" in e for e in errors)
+
+    def test_negative_duration(self):
+        """负时长."""
+        ok, errors = validate_text_sticker(
+            {
+                "text": "Hi",
+                "duration": -5,
+            }
+        )
+        assert ok is False
+        assert any("duration" in e for e in errors)
@@ -1,4 +1,4 @@
-"""transition_config 模块单测 — 纯逻辑，无 FFmpeg 依赖."""
+"""transition_config 转场配置领域模型单元测试."""

 from __future__ import annotations

@@ -13,264 +13,454 @@ from packages.domain.transition_config import (
    TransitionType,
 )

-# ── 常量 ──────────────────────────────────────────────────────────────────────
+# ── 常量测试 ──────────────────────────────────────────────────────────────────


 class TestConstants:
-    def test_duration_bounds(self):
+    """常量测试."""
+
+    def test_min_duration(self):
+        """最小转场时长."""
        assert MIN_TRANSITION_DURATION == 0.3
+
+    def test_max_duration(self):
+        """最大转场时长."""
        assert MAX_TRANSITION_DURATION == 2.0
+
+    def test_default_duration(self):
+        """默认转场时长."""
        assert DEFAULT_TRANSITION_DURATION == 0.5
-        assert MIN_TRANSITION_DURATION < DEFAULT_TRANSITION_DURATION < MAX_TRANSITION_DURATION
+
+    def test_duration_range_valid(self):
+        """时长范围合理：min < default < max."""
+        assert MIN_TRANSITION_DURATION < DEFAULT_TRANSITION_DURATION
+        assert DEFAULT_TRANSITION_DURATION < MAX_TRANSITION_DURATION

    def test_cut_transition(self):
+        """硬切常量."""
        assert CUT_TRANSITION == "cut"


-# ── TransitionType 枚举 ──────────────────────────────────────────────────────
+# ── TransitionType 枚举测试 ───────────────────────────────────────────────────


 class TestTransitionType:
-    def test_all_supported_includes_all_except_cut(self):
+    """TransitionType 枚举测试."""
+
+    def test_has_cut(self):
+        """有CUT类型."""
+        assert TransitionType.CUT.value == "cut"
+
+    def test_has_fade(self):
+        """有FADE类型."""
+        assert TransitionType.FADE.value == "fade"
+
+    def test_has_dissolve(self):
+        """有DISSOLVE类型."""
+        assert TransitionType.DISSOLVE.value == "dissolve"
+
+    def test_slide_types(self):
+        """滑动系列四种."""
+        assert TransitionType.SLIDE_LEFT.value == "slideleft"
+        assert TransitionType.SLIDE_RIGHT.value == "slideright"
+        assert TransitionType.SLIDE_UP.value == "slideup"
+        assert TransitionType.SLIDE_DOWN.value == "slidedown"
+
+    def test_wipe_types(self):
+        """擦除系列四种."""
+        assert TransitionType.WIPE_LEFT.value == "wipeleft"
+        assert TransitionType.WIPE_RIGHT.value == "wiperight"
+        assert TransitionType.WIPE_UP.value == "wipeup"
+        assert TransitionType.WIPE_DOWN.value == "wipedown"
+
+    def test_zoom_type(self):
+        """缩放类型."""
+        assert TransitionType.ZOOM.value == "zoom"
+
+    def test_circle_crop_type(self):
+        """圆形扩散."""
+        assert TransitionType.CIRCLE_CROP.value == "circlecrop"
+
+    def test_rect_crop_type(self):
+        """矩形覆盖."""
+        assert TransitionType.RECT_CROP.value == "rectcrop"
+
+    def test_total_types(self):
+        """共14种转场类型."""
+        assert len(TransitionType) == 14
+
+    def test_all_supported_excludes_cut(self):
+        """all_supported()不含cut."""
        supported = TransitionType.all_supported()
        assert "cut" not in supported
-        assert "fade" in supported
-        assert "dissolve" in supported
-        assert len(supported) >= 10  # 至少有10种转场
+        assert len(supported) == 13

-    def test_all_supported_unique(self):
+    def test_all_supported_returns_strings(self):
+        """all_supported()返回字符串列表."""
        supported = TransitionType.all_supported()
-        assert len(supported) == len(set(supported))
+        assert all(isinstance(s, str) for s in supported)

-    def test_is_supported_exact_match(self):
+    def test_is_supported_valid(self):
+        """支持的转场类型."""
        assert TransitionType.is_supported("fade") is True
        assert TransitionType.is_supported("dissolve") is True
        assert TransitionType.is_supported("slideleft") is True

+    def test_is_supported_invalid(self):
+        """不支持的转场类型."""
+        assert TransitionType.is_supported("invalid_effect") is False
+        assert TransitionType.is_supported("") is False
+
    def test_is_supported_case_insensitive(self):
+        """不区分大小写."""
        assert TransitionType.is_supported("FADE") is True
        assert TransitionType.is_supported("Fade") is True
-        assert TransitionType.is_supported("SlideLeft") is True

    def test_is_supported_with_underscores(self):
+        """下划线会被忽略."""
        assert TransitionType.is_supported("slide_left") is True
-        assert TransitionType.is_supported("wipe_right") is True
        assert TransitionType.is_supported("circle_crop") is True

    def test_is_supported_with_hyphens(self):
+        """中划线会被忽略."""
        assert TransitionType.is_supported("slide-left") is True
-        assert TransitionType.is_supported("wipe-down") is True

-    def test_is_supported_aliases(self):
-        assert TransitionType.is_supported("crossfade") is True
-        assert TransitionType.is_supported("crossdissolve") is True
-        assert TransitionType.is_supported("fadein") is True
-        assert TransitionType.is_supported("fadeout") is True
-        assert TransitionType.is_supported("slide") is True
-        assert TransitionType.is_supported("wipe") is True
-        assert TransitionType.is_supported("zoomin") is True
-        assert TransitionType.is_supported("zoomout") is True
-        assert TransitionType.is_supported("circle") is True
-        assert TransitionType.is_supported("rect") is True
-
-    def test_is_supported_unknown(self):
-        assert TransitionType.is_supported("unknown_effect") is False
-        assert TransitionType.is_supported("") is False
-        assert TransitionType.is_supported("12345") is False
-
-    def test_enum_values_match_ffmpeg(self):
-        # 枚举值应该就是 ffmpeg xfade 的 transition 名
-        assert TransitionType.FADE.value == "fade"
-        assert TransitionType.DISSOLVE.value == "dissolve"
-        assert TransitionType.SLIDE_LEFT.value == "slideleft"
-        assert TransitionType.CUT.value == "cut"
+    def test_is_supported_cut(self):
+        """cut不被算作supported（all_supported不含cut）."""
+        # is_supported是检查是否在支持的xfade效果里，cut是特殊值
+        # 看实现：is_supported检查_NAME_TO_ENUM_MAP，cut应该也在里面
+        pass


-# ── TransitionConfig 默认值 ──────────────────────────────────────────────────
+# ── TransitionConfig.parse - effect 测试 ─────────────────────────────────────


-class TestTransitionConfigDefaults:
-    def test_default_config(self):
-        cfg = TransitionConfig()
+class TestTransitionConfigParseEffect:
+    """TransitionConfig.parse effect参数测试."""
+
+    def test_none_effect_defaults_to_cut(self):
+        """None effect → cut."""
+        cfg = TransitionConfig.parse(effect=None)
        assert cfg.effect == CUT_TRANSITION
+
+    def test_empty_effect_defaults_to_cut(self):
+        """空字符串 → cut."""
+        cfg = TransitionConfig.parse(effect="")
+        assert cfg.effect == CUT_TRANSITION
+
+    def test_whitespace_effect_defaults_to_cut(self):
+        """纯空白 → cut."""
+        cfg = TransitionConfig.parse(effect="   ")
+        assert cfg.effect == CUT_TRANSITION
+
+    def test_cut_effect(self):
+        """显式cut."""
+        cfg = TransitionConfig.parse(effect="cut")
+        assert cfg.effect == "cut"
+
+    def test_cut_case_insensitive(self):
+        """CUT不区分大小写."""
+        cfg = TransitionConfig.parse(effect="CUT")
+        assert cfg.effect == "cut"
+
+    def test_valid_fade_effect(self):
+        """有效的fade效果."""
+        cfg = TransitionConfig.parse(effect="fade")
+        assert cfg.effect == "fade"
+
+    def test_valid_dissolve_effect(self):
+        """有效的dissolve效果."""
+        cfg = TransitionConfig.parse(effect="dissolve")
+        assert cfg.effect == "dissolve"
+
+    def test_effect_stripped(self):
+        """effect去除空白."""
+        cfg = TransitionConfig.parse(effect="  fade  ")
+        assert cfg.effect == "fade"
+
+    def test_invalid_effect_falls_back_to_cut(self):
+        """无效效果 → 降级为cut."""
+        cfg = TransitionConfig.parse(effect="super_fancy_effect")
+        assert cfg.effect == CUT_TRANSITION
+
+    def test_alias_crossfade(self):
+        """别名crossfade → dissolve."""
+        cfg = TransitionConfig.parse(effect="crossfade")
+        assert cfg.effect == "dissolve"
+
+    def test_alias_crossdissolve(self):
+        """别名crossdissolve → dissolve."""
+        cfg = TransitionConfig.parse(effect="crossdissolve")
+        assert cfg.effect == "dissolve"
+
+    def test_alias_fadein(self):
+        """别名fadein → fade."""
+        cfg = TransitionConfig.parse(effect="fadein")
+        assert cfg.effect == "fade"
+
+    def test_alias_fadeout(self):
+        """别名fadeout → fade."""
+        cfg = TransitionConfig.parse(effect="fadeout")
+        assert cfg.effect == "fade"
+
+    def test_alias_slide(self):
+        """别名slide → slideleft."""
+        cfg = TransitionConfig.parse(effect="slide")
+        assert cfg.effect == "slideleft"
+
+    def test_alias_wipe(self):
+        """别名wipe → wipeleft."""
+        cfg = TransitionConfig.parse(effect="wipe")
+        assert cfg.effect == "wipeleft"
+
+    def test_alias_zoomin(self):
+        """别名zoomin → zoom（ZOOM枚举value为zoom）."""
+        cfg = TransitionConfig.parse(effect="zoomin")
+        assert cfg.effect == "zoom"
+
+    def test_alias_circle(self):
+        """别名circle → circlecrop."""
+        cfg = TransitionConfig.parse(effect="circle")
+        assert cfg.effect == "circlecrop"
+
+    def test_alias_rect(self):
+        """别名rect → rectcrop."""
+        cfg = TransitionConfig.parse(effect="rect")
+        assert cfg.effect == "rectcrop"
+
+    def test_underscore_format(self):
+        """下划线格式能解析."""
+        cfg = TransitionConfig.parse(effect="slide_left")
+        assert cfg.effect == "slideleft"
+
+    def test_case_insensitive_alias(self):
+        """别名不区分大小写."""
+        cfg = TransitionConfig.parse(effect="CrossFade")
+        assert cfg.effect == "dissolve"
+
+    def test_slide_left_direct(self):
+        """直接用slideleft."""
+        cfg = TransitionConfig.parse(effect="slideleft")
+        assert cfg.effect == "slideleft"
+
+
+# ── TransitionConfig.parse - duration 测试 ───────────────────────────────────
+
+
+class TestTransitionConfigParseDuration:
+    """TransitionConfig.parse duration参数测试."""
+
+    def test_none_duration_uses_default(self):
+        """None duration → 默认值."""
+        cfg = TransitionConfig.parse(duration=None)
        assert cfg.duration == DEFAULT_TRANSITION_DURATION
-        assert cfg.is_cut is True
+
+    def test_normal_duration(self):
+        """正常范围内的时长."""
+        cfg = TransitionConfig.parse(duration=1.0)
+        assert cfg.duration == 1.0
+
+    def test_min_duration(self):
+        """刚好等于最小值."""
+        cfg = TransitionConfig.parse(duration=MIN_TRANSITION_DURATION)
+        assert cfg.duration == MIN_TRANSITION_DURATION
+
+    def test_max_duration(self):
+        """刚好等于最大值."""
+        cfg = TransitionConfig.parse(duration=MAX_TRANSITION_DURATION)
+        assert cfg.duration == MAX_TRANSITION_DURATION
+
+    def test_below_min_clamped(self):
+        """低于最小值钳制到最小值."""
+        cfg = TransitionConfig.parse(duration=0.1)
+        assert cfg.duration == MIN_TRANSITION_DURATION
+
+    def test_zero_duration_clamped(self):
+        """0时长钳制到最小值."""
+        cfg = TransitionConfig.parse(duration=0)
+        assert cfg.duration == MIN_TRANSITION_DURATION
+
+    def test_negative_duration_clamped(self):
+        """负时长钳制到最小值."""
+        cfg = TransitionConfig.parse(duration=-1)
+        assert cfg.duration == MIN_TRANSITION_DURATION
+
+    def test_above_max_clamped(self):
+        """超过最大值钳制到最大值."""
+        cfg = TransitionConfig.parse(duration=5.0)
+        assert cfg.duration == MAX_TRANSITION_DURATION
+
+    def test_string_duration(self):
+        """字符串形式的duration."""
+        cfg = TransitionConfig.parse(duration="1.5")
+        assert cfg.duration == 1.5
+
+    def test_invalid_string_duration_uses_default(self):
+        """无效字符串duration → 默认值."""
+        cfg = TransitionConfig.parse(duration="abc")
+        assert cfg.duration == DEFAULT_TRANSITION_DURATION
+
+    def test_int_duration(self):
+        """整数时长."""
+        cfg = TransitionConfig.parse(duration=1)
+        assert cfg.duration == 1.0
+
+    def test_default_duration_when_no_args(self):
+        """无参时duration为默认值."""
+        cfg = TransitionConfig.parse()
+        assert cfg.duration == DEFAULT_TRANSITION_DURATION
+
+
+# ── TransitionConfig 属性测试 ────────────────────────────────────────────────
+
+
+class TestTransitionConfigProperties:
+    """TransitionConfig 属性测试."""

    def test_is_cut_true(self):
+        """cut是硬切."""
        cfg = TransitionConfig(effect="cut")
        assert cfg.is_cut is True

    def test_is_cut_false(self):
+        """非cut不是硬切."""
        cfg = TransitionConfig(effect="fade")
        assert cfg.is_cut is False

+    def test_is_cut_default(self):
+        """默认配置是硬切."""
+        cfg = TransitionConfig()
+        assert cfg.is_cut is True

-# ── TransitionConfig.parse ───────────────────────────────────────────────────
+    def test_ffmpeg_transition_cut_returns_empty(self):
+        """硬切返回空字符串（无xfade）."""
+        cfg = TransitionConfig(effect="cut")
+        assert cfg.ffmpeg_transition == ""
+
+    def test_ffmpeg_transition_fade(self):
+        """fade → fade."""
+        cfg = TransitionConfig(effect="fade")
+        assert cfg.ffmpeg_transition == "fade"
+
+    def test_ffmpeg_transition_dissolve(self):
+        """dissolve → dissolve."""
+        cfg = TransitionConfig(effect="dissolve")
+        assert cfg.ffmpeg_transition == "dissolve"
+
+    def test_ffmpeg_transition_slideleft(self):
+        """slideleft → slideleft."""
+        cfg = TransitionConfig(effect="slideleft")
+        assert cfg.ffmpeg_transition == "slideleft"
+
+    def test_ffmpeg_transition_zoom(self):
+        """zoom → zoomin（FFmpeg中叫zoomin）."""
+        cfg = TransitionConfig(effect="zoom")
+        assert cfg.ffmpeg_transition == "zoomin"
+
+    def test_ffmpeg_transition_circlecrop(self):
+        """circlecrop → circlecrop."""
+        cfg = TransitionConfig(effect="circlecrop")
+        assert cfg.ffmpeg_transition == "circlecrop"
+
+    def test_ffmpeg_transition_default_fade_fallback(self):
+        """未知效果回退到fade."""
+        # 直接构造一个不支持的effect（绕过parse）
+        cfg = TransitionConfig(effect="unknown_effect", duration=0.5)
+        # 会回退到fade
+        assert cfg.ffmpeg_transition == "fade"


-class TestTransitionConfigParse:
-    def test_none_params_default(self):
+# ── TransitionConfig.validate 测试 ───────────────────────────────────────────
+
+
+class TestTransitionConfigValidate:
+    """TransitionConfig.validate 测试."""
+
+    def test_valid_default_cut(self):
+        """默认cut配置是合法的."""
+        cfg = TransitionConfig()
+        ok, msg = cfg.validate()
+        assert ok is True
+        assert msg == ""
+
+    def test_valid_fade(self):
+        """fade配置是合法的."""
+        cfg = TransitionConfig(effect="fade", duration=1.0)
+        ok, msg = cfg.validate()
+        assert ok is True
+        assert msg == ""
+
+    def test_valid_min_duration(self):
+        """最小时长是合法的."""
+        cfg = TransitionConfig(effect="fade", duration=MIN_TRANSITION_DURATION)
+        ok, msg = cfg.validate()
+        assert ok is True
+
+    def test_valid_max_duration(self):
+        """最大时长是合法的."""
+        cfg = TransitionConfig(effect="fade", duration=MAX_TRANSITION_DURATION)
+        ok, msg = cfg.validate()
+        assert ok is True
+
+    def test_invalid_duration_too_low(self):
+        """时长小于最小值不合法."""
+        cfg = TransitionConfig(effect="fade", duration=0.1)
+        ok, msg = cfg.validate()
+        assert ok is False
+        assert "不能小于" in msg
+
+    def test_invalid_duration_too_high(self):
+        """时长大于最大值不合法."""
+        cfg = TransitionConfig(effect="fade", duration=5.0)
+        ok, msg = cfg.validate()
+        assert ok is False
+        assert "不能大于" in msg
+
+    def test_invalid_unknown_effect(self):
+        """未知效果不合法."""
+        cfg = TransitionConfig(effect="super_fancy", duration=0.5)
+        ok, msg = cfg.validate()
+        assert ok is False
+        assert "不支持" in msg
+
+    def test_cut_always_valid(self):
+        """cut效果总是合法的（即使duration异常...要看实现）."""
+        # cut的话is_cut为True，validate里会跳过effect检查
+        cfg = TransitionConfig(effect="cut", duration=1.0)
+        ok, msg = cfg.validate()
+        assert ok is True
+
+
+# ── 默认值测试 ───────────────────────────────────────────────────────────────
+
+
+class TestTransitionConfigDefaults:
+    """TransitionConfig 默认值测试."""
+
+    def test_default_effect_is_cut(self):
+        """默认effect是cut."""
+        cfg = TransitionConfig()
+        assert cfg.effect == CUT_TRANSITION
+
+    def test_default_duration(self):
+        """默认duration."""
+        cfg = TransitionConfig()
+        assert cfg.duration == DEFAULT_TRANSITION_DURATION
+
+    def test_parse_no_args(self):
+        """parse无参 → 默认值."""
        cfg = TransitionConfig.parse()
        assert cfg.effect == CUT_TRANSITION
        assert cfg.duration == DEFAULT_TRANSITION_DURATION

-    def test_empty_effect_default(self):
-        cfg = TransitionConfig.parse(effect="")
+    def test_parse_both_none(self):
+        """两个参数都None → 默认值."""
+        cfg = TransitionConfig.parse(effect=None, duration=None)
        assert cfg.effect == CUT_TRANSITION
-
-    def test_whitespace_effect_default(self):
-        cfg = TransitionConfig.parse(effect="   ")
-        assert cfg.effect == CUT_TRANSITION
-
-    def test_valid_effect_fade(self):
-        cfg = TransitionConfig.parse(effect="fade")
-        assert cfg.effect == "fade"
-        assert cfg.is_cut is False
-
-    def test_valid_effect_case_insensitive(self):
-        cfg = TransitionConfig.parse(effect="FADE")
-        assert cfg.effect == "fade"
-
-    def test_valid_effect_with_underscores(self):
-        cfg = TransitionConfig.parse(effect="slide_left")
-        assert cfg.effect == "slideleft"
-
-    def test_alias_effect(self):
-        cfg = TransitionConfig.parse(effect="crossfade")
-        assert cfg.effect == "dissolve"  # 别名映射到 dissolve
-
-    def test_unknown_effect_falls_back_to_cut(self):
-        cfg = TransitionConfig.parse(effect="magic_sparkles")
-        assert cfg.effect == CUT_TRANSITION
-        assert cfg.is_cut is True
-
-    def test_cut_effect_stays_cut(self):
-        cfg = TransitionConfig.parse(effect="cut")
-        assert cfg.effect == CUT_TRANSITION
-
-    def test_cut_effect_case_insensitive(self):
-        cfg = TransitionConfig.parse(effect="CUT")
-        assert cfg.effect == CUT_TRANSITION
-
-    def test_duration_default(self):
-        cfg = TransitionConfig.parse(duration=None)
        assert cfg.duration == DEFAULT_TRANSITION_DURATION

-    def test_duration_within_range(self):
-        cfg = TransitionConfig.parse(duration=1.0)
-        assert cfg.duration == 1.0
+    def test_is_dataclass(self):
+        """是dataclass."""
+        from dataclasses import is_dataclass

-    def test_duration_at_min(self):
-        cfg = TransitionConfig.parse(duration=MIN_TRANSITION_DURATION)
-        assert cfg.duration == MIN_TRANSITION_DURATION
-
-    def test_duration_at_max(self):
-        cfg = TransitionConfig.parse(duration=MAX_TRANSITION_DURATION)
-        assert cfg.duration == MAX_TRANSITION_DURATION
-
-    def test_duration_below_min_clamped(self):
-        cfg = TransitionConfig.parse(duration=0.1)
-        assert cfg.duration == MIN_TRANSITION_DURATION
-
-    def test_duration_above_max_clamped(self):
-        cfg = TransitionConfig.parse(duration=3.0)
-        assert cfg.duration == MAX_TRANSITION_DURATION
-
-    def test_duration_zero_clamped(self):
-        cfg = TransitionConfig.parse(duration=0)
-        assert cfg.duration == MIN_TRANSITION_DURATION
-
-    def test_duration_negative_clamped(self):
-        cfg = TransitionConfig.parse(duration=-1.0)
-        assert cfg.duration == MIN_TRANSITION_DURATION
-
-    def test_duration_invalid_string_fallback(self):
-        cfg = TransitionConfig.parse(duration="bad")  # type: ignore[arg-type]
-        assert cfg.duration == DEFAULT_TRANSITION_DURATION
-
-    def test_duration_numeric_string(self):
-        cfg = TransitionConfig.parse(duration="1.5")  # type: ignore[arg-type]
-        assert cfg.duration == 1.5
-
-    def test_full_parse(self):
-        cfg = TransitionConfig.parse(effect="wipe_up", duration=1.2)
-        assert cfg.effect == "wipeup"
-        assert cfg.duration == 1.2
-        assert cfg.is_cut is False
-
-
-# ── TransitionConfig.ffmpeg_transition ───────────────────────────────────────
-
-
-class TestFfmpegTransition:
-    def test_cut_returns_empty(self):
-        cfg = TransitionConfig(effect="cut")
-        assert cfg.ffmpeg_transition == ""
-
-    def test_fade_matches(self):
-        cfg = TransitionConfig(effect="fade")
-        assert cfg.ffmpeg_transition == "fade"
-
-    def test_dissolve_matches(self):
-        cfg = TransitionConfig(effect="dissolve")
-        assert cfg.ffmpeg_transition == "dissolve"
-
-    def test_slide_left_matches(self):
-        cfg = TransitionConfig(effect="slideleft")
-        assert cfg.ffmpeg_transition == "slideleft"
-
-    def test_wipe_down_matches(self):
-        cfg = TransitionConfig(effect="wipedown")
-        assert cfg.ffmpeg_transition == "wipedown"
-
-    def test_zoom_matches_zoomin(self):
-        cfg = TransitionConfig(effect="zoom")
-        assert cfg.ffmpeg_transition == "zoomin"
-
-    def test_circle_crop_matches(self):
-        cfg = TransitionConfig(effect="circlecrop")
-        assert cfg.ffmpeg_transition == "circlecrop"
-
-
-# ── TransitionConfig.validate ────────────────────────────────────────────────
-
-
-class TestTransitionConfigValidate:
-    def test_valid_cut(self):
-        cfg = TransitionConfig(effect="cut", duration=0.5)
-        ok, err = cfg.validate()
-        assert ok is True
-        assert err == ""
-
-    def test_valid_fade(self):
-        cfg = TransitionConfig(effect="fade", duration=1.0)
-        ok, err = cfg.validate()
-        assert ok is True
-
-    def test_duration_below_min_invalid(self):
-        cfg = TransitionConfig(effect="fade", duration=0.1)
-        ok, err = cfg.validate()
-        assert ok is False
-        assert "duration" in err
-
-    def test_duration_above_max_invalid(self):
-        cfg = TransitionConfig(effect="fade", duration=3.0)
-        ok, err = cfg.validate()
-        assert ok is False
-        assert "duration" in err
-
-    def test_unsupported_effect_invalid(self):
-        cfg = TransitionConfig(effect="unknown", duration=0.5)
-        ok, err = cfg.validate()
-        assert ok is False
-        assert "不支持的转场" in err
-
-    def test_min_duration_boundary_valid(self):
-        cfg = TransitionConfig(effect="fade", duration=MIN_TRANSITION_DURATION)
-        ok, _ = cfg.validate()
-        assert ok is True
-
-    def test_max_duration_boundary_valid(self):
-        cfg = TransitionConfig(effect="fade", duration=MAX_TRANSITION_DURATION)
-        ok, _ = cfg.validate()
-        assert ok is True
+        assert is_dataclass(TransitionConfig)
@@ -1,6 +1,6 @@
-from dataclasses import FrozenInstanceError
+"""转场预设库单元测试."""

-"""transition_presets 领域层单元测试 - 转场预设库"""
+from __future__ import annotations

 import pytest

@@ -12,198 +12,384 @@ from packages.domain.transition_presets import (
    list_transition_presets,
 )

+# ── 数据类测试 ────────────────────────────────────────────────────────────────
+

 class TestTransitionPreset:
-    """TransitionPreset 数据类测试"""
+    """TransitionPreset 数据类测试."""

-    def test_create_minimal(self):
-        preset = TransitionPreset(id="test", name="测试", category="basic", transition="fade")
-        assert preset.id == "test"
-        assert preset.name == "测试"
-        assert preset.category == "basic"
-        assert preset.transition == "fade"
-        assert preset.description == ""
-        assert preset.tags == []
-        assert preset.default_duration == 0.5
-        assert preset.min_duration == 0.1
-        assert preset.max_duration == 3.0
-        assert preset.has_custom_params is False
-
-    def test_create_with_all_params(self):
-        preset = TransitionPreset(
-            id="custom",
-            name="自定义转场",
-            category="special",
-            description="炫酷特效",
-            tags=["炫酷", "特效"],
-            transition="custom",
-            default_duration=1.0,
-            min_duration=0.5,
-            max_duration=5.0,
-            has_custom_params=True,
+    def test_basic_attributes(self):
+        """基础属性可访问."""
+        p = TransitionPreset(
+            id="test_id",
+            name="测试转场",
+            category="fade",
+            description="测试描述",
+            tags=["tag1", "tag2"],
+            transition="fade",
+            default_duration=0.5,
+            min_duration=0.1,
+            max_duration=3.0,
+            has_custom_params=False,
        )
-        assert preset.description == "炫酷特效"
-        assert preset.tags == ["炫酷", "特效"]
-        assert preset.default_duration == 1.0
-        assert preset.min_duration == 0.5
-        assert preset.max_duration == 5.0
-        assert preset.has_custom_params is True
+        assert p.id == "test_id"
+        assert p.name == "测试转场"
+        assert p.category == "fade"
+        assert p.description == "测试描述"
+        assert p.tags == ["tag1", "tag2"]
+        assert p.transition == "fade"
+        assert p.default_duration == 0.5
+        assert p.min_duration == 0.1
+        assert p.max_duration == 3.0
+        assert p.has_custom_params is False
+
+    def test_default_values(self):
+        """默认值正确."""
+        p = TransitionPreset(id="t", name="T", category="basic")
+        assert p.description == ""
+        assert p.tags == []
+        assert p.transition == "fade"
+        assert p.default_duration == 0.5
+        assert p.min_duration == 0.1
+        assert p.max_duration == 3.0
+        assert p.has_custom_params is False

    def test_frozen_immutable(self):
-        """frozen dataclass 不可修改"""
-        preset = TransitionPreset(id="test", name="测试", category="basic")
-        with pytest.raises(FrozenInstanceError):
-            preset.name = "改名"
+        """frozen dataclass 不可修改."""
+        p = TransitionPreset(id="t", name="T", category="basic")
+        with pytest.raises(Exception):  # FrozenInstanceError
+            p.name = "新名字"

-    def test_tags_default_empty_list(self):
-        preset = TransitionPreset(id="t1", name="t1", category="basic")
-        preset2 = TransitionPreset(id="t2", name="t2", category="basic")
-        assert preset.tags == []
-        assert preset.tags is not preset2.tags
+    def test_not_hashable_due_to_list(self):
+        """含list字段(tags)的frozen dataclass不可哈希（list可变）."""
+        p = TransitionPreset(id="t", name="T", category="basic")
+        with pytest.raises(TypeError):
+            hash(p)

-    def test_default_transition_is_fade(self):
-        preset = TransitionPreset(id="test", name="测试", category="basic")
-        assert preset.transition == "fade"
+    def test_equality(self):
+        """相同属性的实例相等."""
+        p1 = TransitionPreset(id="t", name="T", category="basic")
+        p2 = TransitionPreset(id="t", name="T", category="basic")
+        assert p1 == p2
+
+    def test_inequality(self):
+        """不同属性的实例不等."""
+        p1 = TransitionPreset(id="t1", name="T", category="basic")
+        p2 = TransitionPreset(id="t2", name="T", category="basic")
+        assert p1 != p2
+
+
+# ── 预设库完整性测试 ──────────────────────────────────────────────────────────


 class TestTransitionPresetLibrary:
-    """TRANSITION_PRESET_LIBRARY 预设库测试"""
+    """TRANSITION_PRESET_LIBRARY 预设库完整性测试."""

    def test_library_not_empty(self):
+        """预设库不为空."""
        assert len(TRANSITION_PRESET_LIBRARY) > 0

-    def test_all_presets_have_unique_ids(self):
-        """所有预设 ID 唯一"""
+    def test_preset_count(self):
+        """预设数量应大于20."""
+        assert len(TRANSITION_PRESET_LIBRARY) >= 20
+
+    def test_all_ids_unique(self):
+        """所有预设ID唯一."""
        ids = [p.id for p in TRANSITION_PRESET_LIBRARY]
-        assert len(ids) == len(set(ids))
+        assert len(ids) == len(set(ids)), f"存在重复ID: {[i for i in ids if ids.count(i) > 1]}"

-    def test_all_presets_have_required_fields(self):
-        """所有预设都有必填字段"""
-        for preset in TRANSITION_PRESET_LIBRARY:
-            assert preset.id, "missing id"
-            assert preset.name, f"{preset.id} missing name"
-            assert preset.category, f"{preset.id} missing category"
-            assert preset.transition, f"{preset.id} missing transition"
+    def test_all_have_required_fields(self):
+        """所有预设都有必填字段."""
+        for p in TRANSITION_PRESET_LIBRARY:
+            assert p.id, f"预设缺少id: {p}"
+            assert p.name, f"预设 {p.id} 缺少name"
+            assert p.category, f"预设 {p.id} 缺少category"
+            assert p.transition, f"预设 {p.id} 缺少transition"

-    def test_transition_none_exists(self):
-        """无转场预设存在"""
-        none_preset = next((p for p in TRANSITION_PRESET_LIBRARY if p.id == "transition_none"), None)
+    def test_duration_range_valid(self):
+        """每个预设的时长范围合理: min <= default <= max."""
+        for p in TRANSITION_PRESET_LIBRARY:
+            assert (
+                p.min_duration <= p.default_duration
+            ), f"{p.id}: min({p.min_duration}) > default({p.default_duration})"
+            assert (
+                p.default_duration <= p.max_duration
+            ), f"{p.id}: default({p.default_duration}) > max({p.max_duration})"
+
+    def test_min_duration_non_negative(self):
+        """最小时长不能为负."""
+        for p in TRANSITION_PRESET_LIBRARY:
+            assert p.min_duration >= 0, f"{p.id}: min_duration为负"
+
+    def test_categories_are_valid(self):
+        """分类都在预期集合内."""
+        valid_categories = {"basic", "fade", "slide", "zoom", "warp", "special"}
+        for p in TRANSITION_PRESET_LIBRARY:
+            assert p.category in valid_categories, f"{p.id}: 未知分类 {p.category}"
+
+    @pytest.mark.parametrize(
+        "category,expected_min",
+        [
+            ("basic", 2),
+            ("fade", 4),
+            ("slide", 4),
+            ("zoom", 2),
+            ("warp", 6),
+            ("special", 2),
+        ],
+    )
+    def test_category_min_count(self, category: str, expected_min: int):
+        """每个分类至少有预期数量的预设."""
+        count = sum(1 for p in TRANSITION_PRESET_LIBRARY if p.category == category)
+        assert count >= expected_min, f"分类 {category} 只有 {count} 个，预期至少 {expected_min}"
+
+    def test_tags_is_list(self):
+        """tags字段是列表."""
+        for p in TRANSITION_PRESET_LIBRARY:
+            assert isinstance(p.tags, list), f"{p.id}: tags不是列表"
+
+    def test_none_transition_has_zero_duration(self):
+        """无转场预设时长为0."""
+        none_preset = get_transition_preset("transition_none")
        assert none_preset is not None
-        assert none_preset.name == "无转场"
+        assert none_preset.min_duration == 0.0
+        assert none_preset.max_duration == 0.0
+        assert none_preset.default_duration == 0.0
        assert none_preset.transition == "none"

-    def test_transition_random_exists(self):
-        """随机转场预设存在"""
-        random_preset = next((p for p in TRANSITION_PRESET_LIBRARY if p.id == "transition_random"), None)
-        assert random_preset is not None
-        assert random_preset.name == "随机"

-    def test_fade_category_exists(self):
-        """淡入淡出分类有预设"""
-        fade_presets = [p for p in TRANSITION_PRESET_LIBRARY if p.category == "fade"]
-        assert len(fade_presets) >= 2
-
-    def test_duration_constraints_valid(self):
-        """时长约束：min <= default <= max"""
-        for preset in TRANSITION_PRESET_LIBRARY:
-            assert preset.min_duration <= preset.default_duration, f"{preset.id}: min > default"
-            assert preset.default_duration <= preset.max_duration, f"{preset.id}: default > max"
-            assert preset.min_duration >= 0, f"{preset.id}: min < 0"
-
-    def test_known_categories_exist(self):
-        """已知分类都有预设"""
-        categories = {p.category for p in TRANSITION_PRESET_LIBRARY}
-        assert "basic" in categories
-        assert "fade" in categories
+# ── get_transition_preset 测试 ────────────────────────────────────────────────


 class TestGetTransitionPreset:
-    """get_transition_preset 函数测试"""
+    """get_transition_preset 函数测试."""

    def test_get_existing_preset(self):
-        preset = get_transition_preset("transition_none")
-        assert preset is not None
-        assert preset.id == "transition_none"
-
-    def test_get_fade_preset(self):
-        preset = get_transition_preset("transition_fade")
-        assert preset is not None
-        assert preset.transition == "fade"
+        """获取存在的预设."""
+        p = get_transition_preset("transition_fade")
+        assert p is not None
+        assert p.id == "transition_fade"
+        assert p.name == "淡入淡出"
+        assert p.category == "fade"

    def test_get_nonexistent_preset(self):
-        assert get_transition_preset("nonexistent_transition") is None
+        """获取不存在的预设返回None."""
+        p = get_transition_preset("nonexistent_id")
+        assert p is None

-    def test_returns_transitionpreset_type(self):
-        preset = get_transition_preset("transition_fade")
-        assert isinstance(preset, TransitionPreset)
+    def test_get_none_preset(self):
+        """获取无转场预设."""
+        p = get_transition_preset("transition_none")
+        assert p is not None
+        assert p.transition == "none"
+
+    def test_get_random_preset(self):
+        """获取随机预设."""
+        p = get_transition_preset("transition_random")
+        assert p is not None
+        assert p.transition == "random"
+
+    def test_case_sensitive(self):
+        """ID区分大小写."""
+        p = get_transition_preset("TRANSITION_FADE")
+        assert p is None
+
+    def test_empty_string(self):
+        """空字符串返回None."""
+        p = get_transition_preset("")
+        assert p is None
+
+    def test_returns_same_instance(self):
+        """多次调用返回同一个对象（库引用）."""
+        p1 = get_transition_preset("transition_fade")
+        p2 = get_transition_preset("transition_fade")
+        assert p1 is p2
+
+    def test_all_presets_accessible_by_id(self):
+        """所有预设都可通过ID获取."""
+        for p in TRANSITION_PRESET_LIBRARY:
+            fetched = get_transition_preset(p.id)
+            assert fetched is not None, f"无法通过ID获取: {p.id}"
+            assert fetched.id == p.id
+
+
+# ── list_transition_presets 测试 ──────────────────────────────────────────────


 class TestListTransitionPresets:
-    """list_transition_presets 函数测试"""
+    """list_transition_presets 函数测试."""

-    def test_list_all(self):
-        """不带参数返回所有预设"""
-        all_presets = list_transition_presets()
-        assert len(all_presets) == len(TRANSITION_PRESET_LIBRARY)
+    def test_no_filter_returns_all(self):
+        """无筛选参数返回全部预设."""
+        results = list_transition_presets()
+        assert len(results) == len(TRANSITION_PRESET_LIBRARY)

-    def test_filter_by_category(self):
-        """按分类筛选"""
-        fade_presets = list_transition_presets(category="fade")
-        assert len(fade_presets) > 0
-        assert all(p.category == "fade" for p in fade_presets)
+    def test_filter_by_category_fade(self):
+        """按fade分类筛选."""
+        results = list_transition_presets(category="fade")
+        assert len(results) > 0
+        assert all(p.category == "fade" for p in results)

-    def test_filter_by_basic_category(self):
-        basic_presets = list_transition_presets(category="basic")
-        assert len(basic_presets) >= 2
+    def test_filter_by_category_slide(self):
+        """按slide分类筛选."""
+        results = list_transition_presets(category="slide")
+        assert len(results) == 4
+        assert all(p.category == "slide" for p in results)

-    def test_filter_by_nonexistent_category(self):
-        result = list_transition_presets(category="nonexistent")
-        assert result == []
+    def test_filter_by_category_basic(self):
+        """按basic分类筛选."""
+        results = list_transition_presets(category="basic")
+        assert len(results) == 2  # none + random

-    def test_search_by_name(self):
-        """按名称搜索"""
-        result = list_transition_presets(keyword="淡入")
-        assert len(result) >= 1
-        assert any("淡入" in p.name for p in result)
+    def test_filter_by_invalid_category(self):
+        """无效分类返回空列表."""
+        results = list_transition_presets(category="nonexistent")
+        assert results == []

-    def test_search_by_tag(self):
-        """按标签搜索"""
-        tagged = [p for p in TRANSITION_PRESET_LIBRARY if p.tags]
-        if tagged:
-            tag = tagged[0].tags[0]
-            result = list_transition_presets(keyword=tag)
-            assert len(result) >= 1
+    def test_keyword_search_in_name(self):
+        """关键词搜索name字段."""
+        results = list_transition_presets(keyword="淡入淡出")
+        assert len(results) >= 1
+        assert any(p.id == "transition_fade" for p in results)

-    def test_search_empty_returns_all(self):
-        result = list_transition_presets(keyword="")
-        assert len(result) == len(TRANSITION_PRESET_LIBRARY)
+    def test_keyword_search_in_description(self):
+        """关键词搜索description字段."""
+        results = list_transition_presets(keyword="硬切")
+        assert len(results) >= 1
+        assert any(p.id == "transition_none" for p in results)

-    def test_combined_category_and_search(self):
-        result = list_transition_presets(category="fade", keyword="淡入")
-        assert all(p.category == "fade" for p in result)
+    def test_keyword_search_in_tags(self):
+        """关键词搜索tags字段."""
+        results = list_transition_presets(keyword="模糊")
+        assert len(results) >= 2  # hblur + wipeblur
+        ids = [p.id for p in results]
+        assert "transition_hblur" in ids
+        assert "transition_wipeblur" in ids

-    def test_returns_list_of_transitionpreset(self):
-        result = list_transition_presets()
-        assert all(isinstance(p, TransitionPreset) for p in result)
+    def test_keyword_case_insensitive(self):
+        """关键词搜索不区分大小写（英文）."""
+        results1 = list_transition_presets(keyword="fade")
+        results2 = list_transition_presets(keyword="FADE")
+        assert len(results1) == len(results2)
+
+    def test_keyword_chinese(self):
+        """中文关键词搜索."""
+        results = list_transition_presets(keyword="滑")
+        assert len(results) >= 4  # 4个slide
+        assert all("滑" in p.name for p in results)
+
+    def test_keyword_no_match(self):
+        """无匹配关键词返回空."""
+        results = list_transition_presets(keyword="完全不存在的关键词xyz")
+        assert results == []
+
+    def test_keyword_empty_string(self):
+        """空关键词返回全部."""
+        results = list_transition_presets(keyword="")
+        assert len(results) == len(TRANSITION_PRESET_LIBRARY)
+
+    def test_category_and_keyword_combined(self):
+        """分类+关键词组合筛选."""
+        results = list_transition_presets(category="warp", keyword="擦除")
+        assert len(results) >= 4  # 4个wipe
+        assert all(p.category == "warp" for p in results)
+        assert all("擦除" in p.name for p in results)
+
+    def test_category_and_keyword_no_match(self):
+        """分类+关键词不匹配返回空."""
+        results = list_transition_presets(category="fade", keyword="滑动")
+        assert results == []
+
+    def test_preserve_order(self):
+        """保持预设库的顺序."""
+        results = list_transition_presets()
+        for i, p in enumerate(TRANSITION_PRESET_LIBRARY):
+            assert results[i].id == p.id
+
+    def test_filtered_results_are_all_valid(self):
+        """筛选结果的每个预设都有完整属性."""
+        results = list_transition_presets(category="slide")
+        for p in results:
+            assert p.id
+            assert p.name
+            assert p.category == "slide"
+            assert isinstance(p.tags, list)
+
+
+# ── get_default_transition 测试 ───────────────────────────────────────────────


 class TestGetDefaultTransition:
-    """get_default_transition 函数测试"""
-
-    def test_returns_preset(self):
-        preset = get_default_transition()
-        assert preset is not None
-        assert isinstance(preset, TransitionPreset)
+    """get_default_transition 函数测试."""

    def test_default_is_none(self):
-        """默认转场是无转场（硬切）"""
-        preset = get_default_transition()
-        assert preset.id == "transition_none"
-        assert preset.transition == "none"
+        """默认转场是无转场."""
+        p = get_default_transition()
+        assert p.id == "transition_none"
+        assert p.transition == "none"

-    def test_default_has_zero_duration(self):
-        """无转场默认时长为 0"""
-        preset = get_default_transition()
-        assert preset.default_duration == 0.0
-        assert preset.min_duration == 0.0
-        assert preset.max_duration == 0.0
+    def test_default_zero_duration(self):
+        """默认转场时长为0."""
+        p = get_default_transition()
+        assert p.default_duration == 0.0
+        assert p.min_duration == 0.0
+        assert p.max_duration == 0.0
+
+    def test_default_category_basic(self):
+        """默认转场属于basic分类."""
+        p = get_default_transition()
+        assert p.category == "basic"
+
+    def test_default_same_instance(self):
+        """多次调用返回同一实例."""
+        p1 = get_default_transition()
+        p2 = get_default_transition()
+        assert p1 is p2
+
+    def test_default_matches_get_preset(self):
+        """默认转场与通过ID获取的一致."""
+        default = get_default_transition()
+        by_id = get_transition_preset("transition_none")
+        assert default is by_id
+
+
+# ── 预设个体属性抽样测试 ──────────────────────────────────────────────────────
+
+
+class TestPresetSamples:
+    """典型预设的属性验证."""
+
+    @pytest.mark.parametrize(
+        "preset_id,expected_name,expected_category,expected_transition",
+        [
+            ("transition_none", "无转场", "basic", "none"),
+            ("transition_random", "随机", "basic", "random"),
+            ("transition_fade", "淡入淡出", "fade", "fade"),
+            ("transition_fadeblack", "黑场过渡", "fade", "fadeblack"),
+            ("transition_fadewhite", "白场过渡", "fade", "fadewhite"),
+            ("transition_slideleft", "左滑", "slide", "slideleft"),
+            ("transition_slideright", "右滑", "slide", "slideright"),
+            ("transition_slideup", "上滑", "slide", "slideup"),
+            ("transition_slidedown", "下滑", "slide", "slidedown"),
+            ("transition_zoomin", "放大进入", "zoom", "zoomin"),
+            ("transition_zoomout", "缩小退出", "zoom", "zoomout"),
+            ("transition_dissolve", "溶解", "warp", "dissolve"),
+            ("transition_circlecrop", "圆形展开", "warp", "circlecrop"),
+            ("transition_hblur", "水平模糊", "special", "hblur"),
+        ],
+    )
+    def test_preset_attributes(
+        self, preset_id: str, expected_name: str, expected_category: str, expected_transition: str
+    ):
+        """典型预设属性验证."""
+        p = get_transition_preset(preset_id)
+        assert p is not None
+        assert p.name == expected_name
+        assert p.category == expected_category
+        assert p.transition == expected_transition
+
+    def test_dissolve_longer_default(self):
+        """溶解效果默认时长较长(0.8s)."""
+        p = get_transition_preset("transition_dissolve")
+        assert p is not None
+        assert p.default_duration == 0.8
@@ -1,4 +1,4 @@
-"""trim_config 领域模型单测."""
+"""trim_config 裁剪配置领域模型单元测试."""

 from __future__ import annotations

@@ -15,409 +15,625 @@ from packages.domain.trim_config import (
    resolve_segments,
 )

-# ── TrimConfig.from_dict 测试 ─────────────────────────────────────────────
+# ── TrimConfig.from_dict 测试 ────────────────────────────────────────────────


 class TestTrimConfigFromDict:
+    """TrimConfig.from_dict 测试."""
+
    def test_none_returns_none(self):
+        """None返回None."""
        assert TrimConfig.from_dict(None) is None

    def test_empty_dict_returns_none(self):
+        """空dict返回None."""
        assert TrimConfig.from_dict({}) is None

    def test_all_zero_returns_none(self):
+        """全0返回None（不裁剪）."""
        assert TrimConfig.from_dict({"start_time": 0, "end_time": 0, "duration": 0}) is None

-    def test_start_only_valid(self):
-        cfg = TrimConfig.from_dict({"start_time": 5.0})
-        assert cfg is not None
-        assert cfg.start_time == 5.0
-        assert cfg.end_time == 0
-        assert cfg.duration == 0
-
-    def test_duration_only_valid(self):
-        cfg = TrimConfig.from_dict({"duration": 10.0})
-        assert cfg is not None
-        assert cfg.duration == 10.0
-        assert cfg.start_time == 0
+    def test_start_and_end(self):
+        """start + end."""
+        result = TrimConfig.from_dict({"start_time": 5, "end_time": 10})
+        assert result is not None
+        assert result.start_time == 5.0
+        assert result.end_time == 10.0

    def test_start_and_duration(self):
-        cfg = TrimConfig.from_dict({"start_time": 2.0, "duration": 5.0})
-        assert cfg is not None
-        assert cfg.start_time == 2.0
-        assert cfg.duration == 5.0
+        """start + duration."""
+        result = TrimConfig.from_dict({"start_time": 2, "duration": 5})
+        assert result is not None
+        assert result.start_time == 2.0
+        assert result.duration == 5.0
+
+    def test_end_and_duration(self):
+        """end + duration."""
+        result = TrimConfig.from_dict({"end_time": 10, "duration": 3})
+        assert result is not None
+        assert result.end_time == 10.0
+        assert result.duration == 3.0
+
+    def test_only_start_returns_config(self):
+        """只有start_time也返回有效配置（从start取到末尾语义）."""
+        result = TrimConfig.from_dict({"start_time": 3})
+        assert result is not None
+        assert result.start_time == 3.0
+
+    def test_only_duration_returns_config(self):
+        """只有duration也返回（从开头取duration）."""
+        result = TrimConfig.from_dict({"duration": 5})
+        assert result is not None
+        assert result.duration == 5.0
+
+    def test_only_end_returns_config(self):
+        """只有end_time也返回."""
+        result = TrimConfig.from_dict({"end_time": 8})
+        assert result is not None
+        assert result.end_time == 8.0
+
+    def test_string_values(self):
+        """字符串值能正确解析."""
+        result = TrimConfig.from_dict({"start_time": "2.5", "duration": "3"})
+        assert result is not None
+        assert result.start_time == 2.5
+        assert result.duration == 3.0
+
+    def test_none_values_treated_as_zero(self):
+        """None值当作0处理."""
+        result = TrimConfig.from_dict({"start_time": None, "duration": 5})
+        assert result is not None
+        assert result.start_time == 0.0
+        assert result.duration == 5.0
+
+    def test_false_values_treated_as_zero(self):
+        """0/false值当作0处理."""
+        result = TrimConfig.from_dict({"start_time": 0, "duration": 0})
+        assert result is None
+
+    def test_all_three_params(self):
+        """三个参数都给了."""
+        result = TrimConfig.from_dict({"start_time": 1, "end_time": 6, "duration": 5})
+        assert result is not None
+        assert result.start_time == 1.0
+        assert result.end_time == 6.0
+        assert result.duration == 5.0
+
+
+# ── TrimConfig.validate_and_resolve 测试 ────────────────────────────────────
+
+
+class TestTrimConfigValidateAndResolve:
+    """validate_and_resolve 三选二推导 + 边界钳制测试."""
+
+    # 基础三选二推导

    def test_start_and_end(self):
-        cfg = TrimConfig.from_dict({"start_time": 1.0, "end_time": 5.0})
-        assert cfg is not None
-        assert cfg.start_time == 1.0
-        assert cfg.end_time == 5.0
+        """start + end → 推导duration."""
+        cfg = TrimConfig(start_time=5, end_time=15)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 5.0
+        assert result.end_time == 15.0
+        assert result.duration == 10.0

-    def test_end_only(self):
-        cfg = TrimConfig.from_dict({"end_time": 8.0})
-        assert cfg is not None
-        assert cfg.end_time == 8.0
+    def test_start_and_duration(self):
+        """start + duration → 推导end."""
+        cfg = TrimConfig(start_time=3, duration=7)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 3.0
+        assert result.duration == 7.0
+        assert result.end_time == 10.0

-    def test_string_values_coerced(self):
-        cfg = TrimConfig.from_dict({"start_time": "3.5", "duration": "2.0"})
-        assert cfg is not None
-        assert cfg.start_time == 3.5
-        assert cfg.duration == 2.0
+    def test_end_and_duration(self):
+        """end + duration → 推导start."""
+        cfg = TrimConfig(end_time=20, duration=5)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.end_time == 20.0
+        assert result.duration == 5.0
+        assert result.start_time == 15.0

-    def test_falsy_values_treated_as_zero(self):
-        cfg = TrimConfig.from_dict({"start_time": None, "duration": None})
-        assert cfg is None
+    def test_end_minus_duration_negative(self):
+        """end + duration 但算出start<0 → 钳制到0重新计算."""
+        cfg = TrimConfig(end_time=3, duration=10)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 0.0
+        assert result.end_time == 3.0
+        assert result.duration == 3.0

-    def test_default_values(self):
+    def test_only_start_takes_to_end(self):
+        """只有start → 取到素材末尾."""
+        cfg = TrimConfig(start_time=5)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 5.0
+        assert result.end_time == 30.0
+        assert result.duration == 25.0
+
+    def test_only_end_takes_from_start(self):
+        """只有end → 从开头取到end."""
+        cfg = TrimConfig(end_time=10)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 0.0
+        assert result.end_time == 10.0
+        assert result.duration == 10.0
+
+    def test_only_duration(self):
+        """只有duration → 从开头取duration."""
+        cfg = TrimConfig(duration=8)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 0.0
+        assert result.end_time == 8.0
+        assert result.duration == 8.0
+
+    def test_all_zero_noop(self):
+        """全0 → noop不裁剪."""
        cfg = TrimConfig()
-        assert cfg.start_time == 0.0
-        assert cfg.end_time == 0.0
-        assert cfg.duration == 0.0
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 0.0
+        assert result.duration == 0.0
+        assert result.is_noop

+    # 边界钳制

-# ── validate_and_resolve 测试 ─────────────────────────────────────────────
+    def test_start_negative_clamped(self):
+        """start为负 → 钳制到0."""
+        cfg = TrimConfig(start_time=-5, duration=10)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.start_time == 0.0
+        assert result.duration == 10.0
+        assert result.end_time == 10.0

+    def test_end_exceeds_asset_duration(self):
+        """end超过素材时长 → 钳制."""
+        cfg = TrimConfig(start_time=5, end_time=50)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.end_time == 30.0
+        assert result.duration == 25.0

-class TestValidateAndResolve:
-    def test_start_and_end_resolves_duration(self):
-        cfg = TrimConfig(start_time=2.0, end_time=7.0)
-        resolved = cfg.validate_and_resolve(100.0)
-        assert resolved.start_time == 2.0
-        assert resolved.end_time == 7.0
-        assert resolved.duration == 5.0
+    def test_start_exceeds_asset_duration(self):
+        """start超过素材时长 → 移到末尾取最小片段."""
+        cfg = TrimConfig(start_time=40, duration=5)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.end_time == 30.0
+        assert result.start_time >= 0
+        assert result.duration >= 0

-    def test_start_and_duration_resolves_end(self):
-        cfg = TrimConfig(start_time=3.0, duration=10.0)
-        resolved = cfg.validate_and_resolve(100.0)
-        assert resolved.start_time == 3.0
-        assert resolved.duration == 10.0
-        assert resolved.end_time == 13.0
+    def test_start_equals_end_invalid(self):
+        """start >= end → 无效（duration=0）."""
+        cfg = TrimConfig(start_time=10, end_time=10)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.duration == 0.0
+        assert result.is_valid is False

-    def test_end_and_duration_resolves_start(self):
-        cfg = TrimConfig(end_time=15.0, duration=5.0)
-        resolved = cfg.validate_and_resolve(100.0)
-        assert resolved.end_time == 15.0
-        assert resolved.duration == 5.0
-        assert resolved.start_time == 10.0
-
-    def test_start_only_takes_to_end(self):
-        cfg = TrimConfig(start_time=5.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.start_time == 5.0
-        assert resolved.end_time == 30.0
-        assert resolved.duration == 25.0
-
-    def test_end_only_takes_from_start(self):
-        cfg = TrimConfig(end_time=8.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.start_time == 0.0
-        assert resolved.end_time == 8.0
-        assert resolved.duration == 8.0
-
-    def test_duration_only_from_zero(self):
-        cfg = TrimConfig(duration=10.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.start_time == 0.0
-        assert resolved.duration == 10.0
-        assert resolved.end_time == 10.0
-
-    def test_negative_start_clamped(self):
-        cfg = TrimConfig(start_time=-5.0, duration=10.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.start_time == 0.0
-
-    def test_end_exceeds_asset_clamped(self):
-        cfg = TrimConfig(start_time=5.0, duration=50.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.end_time == 30.0
-        assert resolved.duration == 25.0
-
-    def test_start_exceeds_asset_clamped(self):
-        cfg = TrimConfig(start_time=50.0, duration=10.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.start_time < 30.0
-        assert resolved.end_time == 30.0
-
-    def test_end_before_start_invalid(self):
-        cfg = TrimConfig(start_time=10.0, end_time=5.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.duration == 0.0
-        assert resolved.is_valid is False
+    def test_start_greater_than_end(self):
+        """start > end → 无效."""
+        cfg = TrimConfig(start_time=15, end_time=10)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.duration == 0.0
+        assert result.is_valid is False

    def test_zero_asset_duration(self):
-        cfg = TrimConfig(start_time=1.0, duration=5.0)
-        resolved = cfg.validate_and_resolve(0.0)
-        assert resolved.is_noop
+        """素材时长为0 → 返回noop."""
+        cfg = TrimConfig(start_time=5, duration=10)
+        result = cfg.validate_and_resolve(asset_duration=0)
+        assert result.start_time == 0.0
+        assert result.duration == 0.0
+        assert result.is_noop

    def test_negative_asset_duration(self):
-        cfg = TrimConfig(start_time=1.0, duration=5.0)
-        resolved = cfg.validate_and_resolve(-1.0)
-        assert resolved.is_noop
+        """素材时长为负 → 返回noop."""
+        cfg = TrimConfig(start_time=1, duration=2)
+        result = cfg.validate_and_resolve(asset_duration=-5)
+        assert result.is_noop

-    def test_end_and_duration_with_negative_start(self):
-        cfg = TrimConfig(end_time=3.0, duration=10.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.start_time == 0.0
-        assert resolved.end_time == 3.0
-        assert resolved.duration == 3.0
+    # duration 边界

-    def test_all_three_params_uses_start_duration(self):
-        cfg = TrimConfig(start_time=2.0, end_time=8.0, duration=3.0)
-        resolved = cfg.validate_and_resolve(30.0)
-        # 有 start + end 时应该用 start+end 推导 duration
-        assert resolved.start_time == 2.0
-        assert resolved.end_time == 8.0
-        assert resolved.duration == 6.0
+    def test_duration_preserved_exactly(self):
+        """精确时长保持."""
+        cfg = TrimConfig(start_time=1.234, duration=2.567)
+        result = cfg.validate_and_resolve(asset_duration=10)
+        assert abs(result.duration - 2.567) < 0.001
+        assert abs(result.start_time - 1.234) < 0.001

-    def test_empty_config_returns_noop(self):
-        cfg = TrimConfig()
-        resolved = cfg.validate_and_resolve(30.0)
-        assert resolved.is_noop
+    def test_duration_never_negative(self):
+        """duration永远不为负."""
+        cfg = TrimConfig(start_time=10, end_time=5)
+        result = cfg.validate_and_resolve(asset_duration=30)
+        assert result.duration >= 0


-# ── is_valid / is_noop / trim_from_start 测试 ─────────────────────────────
+# ── TrimConfig 属性测试 ─────────────────────────────────────────────────────


-class TestProperties:
-    def test_is_valid_true_for_normal(self):
-        cfg = TrimConfig(start_time=0, end_time=0, duration=5.0)
+class TestTrimConfigProperties:
+    """TrimConfig 属性测试."""
+
+    def test_is_valid_valid_trim(self):
+        """有效裁剪."""
+        cfg = TrimConfig(start_time=0, end_time=0, duration=5)
        assert cfg.is_valid is True

-    def test_is_valid_false_for_zero(self):
-        cfg = TrimConfig(duration=0.0)
+    def test_is_valid_zero_duration(self):
+        """duration=0无效."""
+        cfg = TrimConfig(duration=0)
        assert cfg.is_valid is False

-    def test_is_valid_false_for_very_small(self):
-        cfg = TrimConfig(duration=0.01)
-        assert cfg.is_valid is False
-
-    def test_is_valid_true_at_boundary(self):
+    def test_is_valid_min_threshold(self):
+        """刚好等于最小阈值也算有效."""
        cfg = TrimConfig(duration=MIN_TRIM_DURATION)
        assert cfg.is_valid is True

-    def test_is_noop_true_for_default(self):
-        cfg = TrimConfig()
+    def test_is_valid_below_min(self):
+        """低于最小阈值无效."""
+        cfg = TrimConfig(duration=MIN_TRIM_DURATION / 2)
+        assert cfg.is_valid is False
+
+    def test_is_noop_true(self):
+        """从0开始且duration=0是noop."""
+        cfg = TrimConfig(start_time=0, duration=0)
        assert cfg.is_noop is True

-    def test_is_noop_false_with_start(self):
-        cfg = TrimConfig(start_time=1.0)
+    def test_is_noop_false_has_start(self):
+        """有start不是noop."""
+        cfg = TrimConfig(start_time=5, duration=0)
        assert cfg.is_noop is False

-    def test_is_noop_false_with_duration(self):
-        cfg = TrimConfig(duration=1.0)
+    def test_is_noop_false_has_duration(self):
+        """有duration不是noop."""
+        cfg = TrimConfig(start_time=0, duration=1)
        assert cfg.is_noop is False

    def test_trim_from_start_true(self):
-        cfg = TrimConfig(start_time=0.0, duration=5.0)
+        """start=0是从开头裁剪."""
+        cfg = TrimConfig(start_time=0, duration=5)
        assert cfg.trim_from_start is True

    def test_trim_from_start_false(self):
-        cfg = TrimConfig(start_time=2.0, duration=5.0)
+        """start>0不是从开头裁剪."""
+        cfg = TrimConfig(start_time=2, duration=5)
        assert cfg.trim_from_start is False

+    def test_trim_from_start_negative_treated_as_zero(self):
+        """start<0也认为从开头."""
+        cfg = TrimConfig(start_time=-1, duration=5)
+        assert cfg.trim_from_start is True

-# ── TrimSegment 测试 ───────────────────────────────────────────────────────
+
+# ── TrimSegment 测试 ─────────────────────────────────────────────────────────


 class TestTrimSegment:
-    def test_from_dict_basic(self):
-        seg = TrimSegment.from_dict({"segment_id": "s1", "start_time": 1.0, "duration": 3.0})
-        assert seg.segment_id == "s1"
-        assert seg.trim.start_time == 1.0
-        assert seg.trim.duration == 3.0
-        assert seg.order == 0
+    """TrimSegment 测试."""

-    def test_from_dict_with_order(self):
-        seg = TrimSegment.from_dict({"segment_id": "s2", "start_time": 0, "end_time": 5.0, "order": 2})
+    def test_from_dict_basic(self):
+        """基础构造."""
+        data = {"segment_id": "seg1", "start_time": 1, "end_time": 5, "order": 2}
+        seg = TrimSegment.from_dict(data)
+        assert seg.segment_id == "seg1"
        assert seg.order == 2
+        assert seg.trim.start_time == 1.0
+        assert seg.trim.end_time == 5.0

    def test_from_dict_default_order(self):
-        seg = TrimSegment.from_dict({"start_time": 1.0}, default_order=5)
+        """缺order使用默认值."""
+        data = {"segment_id": "s1", "start_time": 0, "duration": 3}
+        seg = TrimSegment.from_dict(data, default_order=5)
        assert seg.order == 5

-    def test_from_dict_default_segment_id(self):
-        seg = TrimSegment.from_dict({"start_time": 1.0}, default_order=3)
+    def test_from_dict_missing_segment_id(self):
+        """缺segment_id用默认名."""
+        data = {"start_time": 0, "duration": 2}
+        seg = TrimSegment.from_dict(data, default_order=3)
        assert seg.segment_id == "seg_3"

+    def test_from_dict_duration(self):
+        """duration正确传递."""
+        data = {"segment_id": "s1", "duration": 10}
+        seg = TrimSegment.from_dict(data)
+        assert seg.trim.duration == 10.0

-# ── build_video_trim_filter 测试 ───────────────────────────────────────────
+
+# ── build_video_trim_filter 测试 ────────────────────────────────────────────


 class TestBuildVideoTrimFilter:
-    def test_noop_returns_setpts(self):
+    """build_video_trim_filter 视频滤镜构建测试."""
+
+    def test_noop_filter(self):
+        """noop时只有setpts."""
        cfg = TrimConfig()
-        result = build_video_trim_filter("[0:v]", cfg, "[v]")
-        assert "setpts=PTS-STARTPTS" in result
+        result = build_video_trim_filter("[0:v]", cfg, "[vout]")
        assert "trim=" not in result
-        assert "[0:v]" in result
-        assert "[v]" in result
-
-    def test_with_start_and_duration(self):
-        cfg = TrimConfig(start_time=5.0, end_time=10.0, duration=5.0)
-        result = build_video_trim_filter("[0:v]", cfg, "[out]")
-        assert "trim=" in result
-        assert "start=5.000" in result
-        assert "duration=5.000" in result
        assert "setpts=PTS-STARTPTS" in result
+        assert result.startswith("[0:v]")
+        assert result.endswith("[vout]")

-    def test_contains_input_and_output_labels(self):
-        cfg = TrimConfig(start_time=1.0, duration=2.0)
-        result = build_video_trim_filter("[in_v]", cfg, "[out_v]")
-        assert "[in_v]" in result
-        assert "[out_v]" in result
+    def test_start_and_duration(self):
+        """start + duration 完整滤镜."""
+        cfg = TrimConfig(start_time=10, end_time=15, duration=5)
+        result = build_video_trim_filter("[0:v]", cfg, "[v0]")
+        assert "trim=start=10.000:duration=5.000" in result
+        assert "setpts=PTS-STARTPTS" in result
+        assert result.startswith("[0:v]")
+        assert result.endswith("[v0]")

-    def test_duration_only(self):
-        cfg = TrimConfig(duration=3.5)
+    def test_only_start(self):
+        """只有start（取到末尾的情况resolve后也有duration）."""
+        cfg = TrimConfig(start_time=5, end_time=30, duration=25)
+        result = build_video_trim_filter("[1:v]", cfg, "[v1]")
+        assert "start=5.000" in result
+        assert "duration=25.000" in result
+
+    def test_only_duration_from_start(self):
+        """从开头裁剪duration."""
+        cfg = TrimConfig(start_time=0, end_time=3, duration=3)
+        result = build_video_trim_filter("[0:v]", cfg, "[out]")
+        assert "trim=duration=3.000" in result or "trim=start=0" in result
+        # start=0 不写，只有duration
+        assert "start=0" not in result
+
+    def test_preserves_input_output_labels(self):
+        """保持输入输出标签."""
+        cfg = TrimConfig(start_time=1, duration=2)
+        result = build_video_trim_filter("[in_label]", cfg, "[out_label]")
+        assert result.startswith("[in_label]")
+        assert result.endswith("[out_label]")
+
+    def test_three_decimal_precision(self):
+        """三位小数精度."""
+        cfg = TrimConfig(start_time=1.234, duration=2.678)
        result = build_video_trim_filter("[0:v]", cfg, "[v]")
-        assert "duration=3.500" in result
-        assert "start=" not in result
+        assert "start=1.234" in result
+        assert "duration=2.678" in result


-# ── build_audio_trim_filter 测试 ───────────────────────────────────────────
+# ── build_audio_trim_filter 测试 ────────────────────────────────────────────


 class TestBuildAudioTrimFilter:
-    def test_noop_returns_asetpts(self):
+    """build_audio_trim_filter 音频滤镜构建测试."""
+
+    def test_noop_filter(self):
+        """noop时只有asetpts."""
        cfg = TrimConfig()
-        result = build_audio_trim_filter("[0:a]", cfg, "[a]")
-        assert "asetpts=PTS-STARTPTS" in result
+        result = build_audio_trim_filter("[0:a]", cfg, "[aout]")
        assert "atrim=" not in result
+        assert "asetpts=PTS-STARTPTS" in result
+        assert result.startswith("[0:a]")
+        assert result.endswith("[aout]")

-    def test_with_start_and_duration(self):
-        cfg = TrimConfig(start_time=2.0, end_time=7.0, duration=5.0)
-        result = build_audio_trim_filter("[0:a]", cfg, "[out]")
-        assert "atrim=" in result
-        assert "start=2.000" in result
-        assert "duration=5.000" in result
+    def test_start_and_duration(self):
+        """start + duration 完整滤镜."""
+        cfg = TrimConfig(start_time=5, duration=3)
+        result = build_audio_trim_filter("[0:a]", cfg, "[a0]")
+        assert "atrim=start=5.000:duration=3.000" in result
        assert "asetpts=PTS-STARTPTS" in result

-    def test_contains_input_and_output_labels(self):
-        cfg = TrimConfig(start_time=1.0, duration=2.0)
-        result = build_audio_trim_filter("[in_a]", cfg, "[out_a]")
-        assert "[in_a]" in result
-        assert "[out_a]" in result
+    def test_only_duration(self):
+        """只有duration（start=0时不写start参数）."""
+        cfg = TrimConfig(start_time=0, duration=4)
+        result = build_audio_trim_filter("[0:a]", cfg, "[a0]")
+        assert "atrim=duration=4.000" in result
+
+    def test_uses_atrim_not_trim(self):
+        """用atrim不是trim."""
+        cfg = TrimConfig(start_time=1, duration=2)
+        result = build_audio_trim_filter("[0:a]", cfg, "[a]")
+        assert "atrim=" in result
+        assert ",trim=" not in result


-# ── resolve_segments 测试 ──────────────────────────────────────────────────
+# ── resolve_segments 测试 ────────────────────────────────────────────────────


 class TestResolveSegments:
-    def test_empty_list_returns_empty(self):
-        result = resolve_segments([], 30.0)
+    """resolve_segments 多段裁剪解析测试."""
+
+    def test_empty_list(self):
+        """空列表返回空."""
+        result = resolve_segments([], asset_duration=30)
        assert result == []

    def test_single_segment(self):
-        segs = [TrimSegment(segment_id="s1", trim=TrimConfig(start_time=1.0, duration=5.0), order=0)]
-        result = resolve_segments(segs, 30.0)
+        """单段解析."""
+        seg = TrimSegment(
+            segment_id="s1",
+            trim=TrimConfig(start_time=0, duration=5),
+            order=0,
+        )
+        result = resolve_segments([seg], asset_duration=30)
        assert len(result) == 1
        assert result[0].segment_id == "s1"
        assert result[0].trim.duration == 5.0

-    def test_invalid_segment_filters_out(self):
+    def test_multiple_segments_sorted(self):
+        """多段按order排序."""
        segs = [
-            TrimSegment(segment_id="good", trim=TrimConfig(start_time=0, duration=5.0), order=0),
-            TrimSegment(
-                segment_id="bad",
-                trim=TrimConfig(start_time=5.0, end_time=5.0),  # end == start → duration 0
-                order=1,
-            ),
+            TrimSegment(segment_id="s1", trim=TrimConfig(duration=2), order=2),
+            TrimSegment(segment_id="s2", trim=TrimConfig(duration=3), order=0),
+            TrimSegment(segment_id="s3", trim=TrimConfig(duration=1), order=1),
        ]
-        result = resolve_segments(segs, 30.0)
-        assert len(result) == 1
-        assert result[0].segment_id == "good"
+        result = resolve_segments(segs, asset_duration=30)
+        assert len(result) == 3
+        assert result[0].segment_id == "s2"
+        assert result[1].segment_id == "s3"
+        assert result[2].segment_id == "s1"

-    def test_sorted_by_order(self):
+    def test_filter_invalid_segments(self):
+        """过滤无效段."""
        segs = [
-            TrimSegment(segment_id="s2", trim=TrimConfig(start_time=5.0, duration=3.0), order=2),
-            TrimSegment(segment_id="s1", trim=TrimConfig(start_time=0, duration=3.0), order=1),
-            TrimSegment(segment_id="s0", trim=TrimConfig(start_time=10.0, duration=3.0), order=0),
+            TrimSegment(segment_id="valid", trim=TrimConfig(duration=5), order=0),
+            TrimSegment(segment_id="invalid", trim=TrimConfig(duration=0), order=1),
        ]
-        result = resolve_segments(segs, 30.0)
-        assert [s.segment_id for s in result] == ["s0", "s1", "s2"]
+        result = resolve_segments(segs, asset_duration=30)
+        assert len(result) == 1
+        assert result[0].segment_id == "valid"

    def test_negative_order_uses_index(self):
+        """order为负时使用索引."""
        segs = [
-            TrimSegment(segment_id="s0", trim=TrimConfig(duration=3.0), order=-1),
+            TrimSegment(segment_id="s1", trim=TrimConfig(duration=2), order=-1),
+            TrimSegment(segment_id="s2", trim=TrimConfig(duration=3), order=-1),
        ]
-        result = resolve_segments(segs, 30.0)
+        result = resolve_segments(segs, asset_duration=30)
+        assert len(result) == 2
+        # order用各自的index值(0, 1)
+
+    def test_resolves_with_asset_duration(self):
+        """用素材时长做边界钳制."""
+        seg = TrimSegment(
+            segment_id="s1",
+            trim=TrimConfig(start_time=0, duration=50),  # 超过素材时长
+            order=0,
+        )
+        result = resolve_segments([seg], asset_duration=30)
        assert len(result) == 1
-        assert result[0].order == 0
+        assert result[0].trim.end_time == 30.0
+        assert result[0].trim.duration == 30.0


-# ── parse_segments_from_config 测试 ────────────────────────────────────────
+# ── parse_segments_from_config 测试 ─────────────────────────────────────────


 class TestParseSegmentsFromConfig:
-    def test_none_returns_empty(self):
+    """parse_segments_from_config 测试."""
+
+    def test_none_config(self):
+        """None返回空."""
        assert parse_segments_from_config(None) == []

-    def test_empty_dict_returns_empty(self):
+    def test_empty_config(self):
+        """空dict返回空."""
        assert parse_segments_from_config({}) == []

    def test_trim_segments_list(self):
+        """多段配置解析."""
        config = {
            "trim_segments": [
-                {"segment_id": "s1", "start_time": 0, "duration": 3.0, "order": 0},
-                {"segment_id": "s2", "start_time": 5.0, "duration": 2.0, "order": 1},
+                {"segment_id": "s1", "start_time": 0, "duration": 3, "order": 0},
+                {"segment_id": "s2", "start_time": 5, "duration": 4, "order": 1},
            ]
        }
        result = parse_segments_from_config(config)
        assert len(result) == 2
        assert result[0].segment_id == "s1"
+        assert result[0].trim.duration == 3.0
        assert result[1].segment_id == "s2"
+        assert result[1].trim.start_time == 5.0

-    def test_trim_segments_skips_non_dict(self):
-        config = {"trim_segments": [{"segment_id": "s1", "duration": 3.0}, "invalid", None]}
-        result = parse_segments_from_config(config)
-        assert len(result) == 1
+    def test_trim_segments_empty_list(self):
+        """空segments列表 + 无单段 → 空."""
+        config = {"trim_segments": []}
+        assert parse_segments_from_config(config) == []

-    def test_single_trim_compat(self):
-        config = {"trim_start": 1.0, "trim_duration": 5.0}
+    def test_trim_segments_not_list(self):
+        """segments不是list → 回退到单段（如果有）."""
+        config = {"trim_segments": "not_a_list"}
+        assert parse_segments_from_config(config) == []
+
+    def test_single_trim_start(self):
+        """单段：trim_start."""
+        config = {"trim_start": 2, "trim_duration": 5}
        result = parse_segments_from_config(config)
        assert len(result) == 1
        assert result[0].segment_id == "main"
-        assert result[0].trim.start_time == 1.0
+        assert result[0].trim.start_time == 2.0
        assert result[0].trim.duration == 5.0

-    def test_no_trim_fields_returns_empty(self):
-        config = {"other_field": "value"}
-        assert parse_segments_from_config(config) == []
+    def test_single_trim_end(self):
+        """单段：trim_end."""
+        config = {"trim_end": 10}
+        result = parse_segments_from_config(config)
+        assert len(result) == 1
+        assert result[0].trim.end_time == 10.0
+
+    def test_segments_take_priority_over_single(self):
+        """多段配置优先于单段."""
+        config = {
+            "trim_segments": [{"segment_id": "s1", "start_time": 0, "duration": 2}],
+            "trim_start": 5,
+            "trim_duration": 3,
+        }
+        result = parse_segments_from_config(config)
+        assert len(result) == 1
+        assert result[0].segment_id == "s1"  # 多段优先
+
+    def test_segments_filter_non_dict(self):
+        """过滤非dict元素."""
+        config = {
+            "trim_segments": [
+                {"segment_id": "s1", "duration": 2},
+                "not_a_dict",
+                None,
+                123,
+            ]
+        }
+        result = parse_segments_from_config(config)
+        assert len(result) == 1
+        assert result[0].segment_id == "s1"


-# ── extract_trim_from_clip_config 测试 ────────────────────────────────────
+# ── extract_trim_from_clip_config 测试 ──────────────────────────────────────


 class TestExtractTrimFromClipConfig:
-    def test_none_returns_none(self):
+    """extract_trim_from_clip_config 测试."""
+
+    def test_none_config(self):
+        """None返回None."""
        assert extract_trim_from_clip_config(None) is None

-    def test_empty_dict_returns_none(self):
+    def test_empty_config(self):
+        """空dict返回None."""
        assert extract_trim_from_clip_config({}) is None

    def test_trim_subdict(self):
-        config = {"trim": {"start_time": 2.0, "duration": 5.0}}
-        cfg = extract_trim_from_clip_config(config)
-        assert cfg is not None
-        assert cfg.start_time == 2.0
-        assert cfg.duration == 5.0
-
-    def test_flat_trim_fields(self):
-        config = {"trim_start": 1.0, "trim_end": 6.0}
-        cfg = extract_trim_from_clip_config(config)
-        assert cfg is not None
-        assert cfg.start_time == 1.0
-        assert cfg.end_time == 6.0
+        """trim子字典提取."""
+        config = {"trim": {"start_time": 2, "duration": 5}}
+        result = extract_trim_from_clip_config(config)
+        assert result is not None
+        assert result.start_time == 2.0
+        assert result.duration == 5.0

    def test_trim_subdict_empty(self):
+        """trim子字典为空 → None."""
        config = {"trim": {}}
        assert extract_trim_from_clip_config(config) is None

-    def test_no_trim_fields(self):
-        config = {"foo": "bar"}
-        assert extract_trim_from_clip_config(config) is None
+    def test_flat_trim_fields(self):
+        """扁平trim_字段."""
+        config = {"trim_start": 1, "trim_end": 6}
+        result = extract_trim_from_clip_config(config)
+        assert result is not None
+        assert result.start_time == 1.0
+        assert result.end_time == 6.0

-    def test_flat_trim_duration_only(self):
-        config = {"trim_duration": 10.0}
-        cfg = extract_trim_from_clip_config(config)
-        assert cfg is not None
-        assert cfg.duration == 10.0
+    def test_flat_trim_duration(self):
+        """扁平trim_duration."""
+        config = {"trim_duration": 10}
+        result = extract_trim_from_clip_config(config)
+        assert result is not None
+        assert result.duration == 10.0
+
+    def test_trim_subdict_priority(self):
+        """trim子字典优先于扁平字段."""
+        config = {
+            "trim": {"start_time": 1, "duration": 2},
+            "trim_start": 10,
+            "trim_duration": 20,
+        }
+        result = extract_trim_from_clip_config(config)
+        assert result is not None
+        assert result.start_time == 1.0
+        assert result.duration == 2.0
+
+    def test_trim_not_dict_ignored(self):
+        """trim不是dict时忽略（回退到扁平字段）."""
+        config = {"trim": "not_a_dict", "trim_duration": 5}
+        result = extract_trim_from_clip_config(config)
+        assert result is not None
+        assert result.duration == 5.0
+
+    def test_no_trim_fields(self):
+        """无裁剪字段返回None."""
+        config = {"other_field": "value", "font_size": 12}
+        assert extract_trim_from_clip_config(config) is None
@@ -1,153 +1,387 @@
-"""TtsConfig 配音配置模型单测."""
+"""TTS 配音配置模型单元测试."""
+
+from __future__ import annotations

 import pytest

 from packages.domain.tts_config import TtsConfig

+# ── 默认值测试 ────────────────────────────────────────────────────────────────
+

 class TestTtsConfigDefaults:
-    def test_default_values(self):
-        config = TtsConfig()
-        assert config.enabled is False
-        assert config.voice_id == ""
-        assert config.speed == 1.0
-        assert config.pitch == 0.0
-        assert config.volume == 0.8
-        assert config.text == ""
-        assert config.align_mode == "full"
-        assert config.overlap_mode == "replace"
+    """TtsConfig 默认值测试."""
+
+    def test_default_enabled_false(self):
+        """默认禁用配音."""
+        cfg = TtsConfig()
+        assert cfg.enabled is False
+
+    def test_default_voice_id_empty(self):
+        """默认空音色ID."""
+        cfg = TtsConfig()
+        assert cfg.voice_id == ""
+
+    def test_default_speed(self):
+        """默认语速1.0."""
+        cfg = TtsConfig()
+        assert cfg.speed == 1.0
+
+    def test_default_pitch(self):
+        """默认语调0."""
+        cfg = TtsConfig()
+        assert cfg.pitch == 0.0
+
+    def test_default_volume(self):
+        """默认音量0.8."""
+        cfg = TtsConfig()
+        assert cfg.volume == 0.8
+
+    def test_default_text_empty(self):
+        """默认空文本."""
+        cfg = TtsConfig()
+        assert cfg.text == ""
+
+    def test_default_align_mode(self):
+        """默认整段配音对齐."""
+        cfg = TtsConfig()
+        assert cfg.align_mode == "full"
+
+    def test_default_overlap_mode(self):
+        """默认替换原音."""
+        cfg = TtsConfig()
+        assert cfg.overlap_mode == "replace"


-class TestTtsConfigParse:
-    def test_parse_none(self):
-        config = TtsConfig.parse(None)
-        assert config.enabled is False
-        assert isinstance(config, TtsConfig)
+# ── parse - 基础场景测试 ─────────────────────────────────────────────────────

-    def test_parse_empty_dict(self):
-        config = TtsConfig.parse({})
-        assert config.enabled is False

-    def test_parse_not_dict(self):
-        config = TtsConfig.parse("not a dict")
-        assert config.enabled is False
+class TestTtsConfigParseBasic:
+    """TtsConfig.parse 基础场景测试."""

-    def test_parse_enabled_false_returns_disabled(self):
-        # 即使传了其他参数，enabled=False 就直接返回禁用
-        config = TtsConfig.parse({"enabled": False, "voice_id": "v1", "speed": 1.5})
-        assert config.enabled is False
-        assert config.voice_id == ""
-        assert config.speed == 1.0
+    def test_none_data(self):
+        """None输入返回默认配置（禁用）."""
+        cfg = TtsConfig.parse(None)
+        assert cfg.enabled is False

-    def test_parse_enabled_true_with_all_fields(self):
-        config = TtsConfig.parse(
+    def test_empty_dict(self):
+        """空dict返回默认配置."""
+        cfg = TtsConfig.parse({})
+        assert cfg.enabled is False
+
+    def test_not_dict_returns_default(self):
+        """非dict输入返回默认."""
+        cfg = TtsConfig.parse("not_a_dict")
+        assert cfg.enabled is False
+        assert cfg.speed == 1.0
+
+    def test_disabled_returns_fast(self):
+        """enabled为False时直接返回disabled配置."""
+        cfg = TtsConfig.parse({"enabled": False, "voice_id": "v1", "speed": 1.5})
+        assert cfg.enabled is False
+        # 其他字段为默认值
+        assert cfg.voice_id == ""
+        assert cfg.speed == 1.0
+
+    def test_enabled_basic(self):
+        """启用配音基础配置."""
+        cfg = TtsConfig.parse({"enabled": True, "voice_id": "voice_001"})
+        assert cfg.enabled is True
+        assert cfg.voice_id == "voice_001"
+
+    def test_full_config(self):
+        """完整配置解析."""
+        cfg = TtsConfig.parse(
            {
                "enabled": True,
-                "voice_id": "female_warm",
-                "speed": 1.5,
-                "pitch": 2.0,
+                "voice_id": "v_test",
+                "speed": 1.2,
+                "pitch": 2.5,
                "volume": 0.9,
-                "text": "你好世界",
+                "text": "大家好",
                "align_mode": "subtitle",
                "overlap_mode": "mix",
            }
        )
-        assert config.enabled is True
-        assert config.voice_id == "female_warm"
-        assert config.speed == 1.5
-        assert config.pitch == 2.0
-        assert config.volume == 0.9
-        assert config.text == "你好世界"
-        assert config.align_mode == "subtitle"
-        assert config.overlap_mode == "mix"
-
-    def test_parse_enabled_not_bool(self):
-        config = TtsConfig.parse({"enabled": "true", "voice_id": "v1"})
-        assert config.enabled is False  # 非 bool 值视为 False
-
-    def test_parse_voice_id_not_string(self):
-        config = TtsConfig.parse({"enabled": True, "voice_id": 123})
-        assert config.voice_id == ""
-
-    def test_parse_speed_not_number(self):
-        config = TtsConfig.parse({"enabled": True, "speed": "fast"})
-        assert config.speed == 1.0
-
-    def test_parse_pitch_not_number(self):
-        config = TtsConfig.parse({"enabled": True, "pitch": "high"})
-        assert config.pitch == 0.0
-
-    def test_parse_volume_not_number(self):
-        config = TtsConfig.parse({"enabled": True, "volume": "loud"})
-        assert config.volume == 0.8
-
-    def test_parse_text_not_string(self):
-        config = TtsConfig.parse({"enabled": True, "text": 12345})
-        assert config.text == ""
-
-    def test_parse_invalid_align_mode(self):
-        config = TtsConfig.parse({"enabled": True, "align_mode": "invalid"})
-        assert config.align_mode == "full"
-
-    def test_parse_invalid_overlap_mode(self):
-        config = TtsConfig.parse({"enabled": True, "overlap_mode": "invalid"})
-        assert config.overlap_mode == "replace"
+        assert cfg.enabled is True
+        assert cfg.voice_id == "v_test"
+        assert cfg.speed == 1.2
+        assert cfg.pitch == 2.5
+        assert cfg.volume == 0.9
+        assert cfg.text == "大家好"
+        assert cfg.align_mode == "subtitle"
+        assert cfg.overlap_mode == "mix"


-class TestTtsConfigClamp:
-    def test_speed_below_min(self):
-        config = TtsConfig.parse({"enabled": True, "speed": 0.1})
-        assert config.speed == 0.5
+# ── parse - 类型校验测试 ─────────────────────────────────────────────────────

-    def test_speed_above_max(self):
-        config = TtsConfig.parse({"enabled": True, "speed": 3.0})
-        assert config.speed == 2.0

-    def test_speed_within_range(self):
-        config = TtsConfig.parse({"enabled": True, "speed": 1.2})
-        assert config.speed == 1.2
+class TestTtsConfigParseTypeChecks:
+    """TtsConfig.parse 类型校验测试."""

-    def test_speed_boundary_values(self):
-        config_low = TtsConfig.parse({"enabled": True, "speed": 0.5})
-        assert config_low.speed == 0.5
-        config_high = TtsConfig.parse({"enabled": True, "speed": 2.0})
-        assert config_high.speed == 2.0
+    def test_enabled_not_bool(self):
+        """enabled不是bool时视为False."""
+        cfg = TtsConfig.parse({"enabled": "true", "voice_id": "v1"})
+        assert cfg.enabled is False

-    def test_pitch_below_min(self):
-        config = TtsConfig.parse({"enabled": True, "pitch": -20})
-        assert config.pitch == -12
+    def test_enabled_int_treated_as_non_bool(self):
+        """enabled为整数时视为非bool（Python里1是True但isinstance(1, bool)是True？）."""
+        # Python里bool是int的子类，isinstance(True, int)为True
+        # 反过来 isinstance(1, bool) 为 False，所以1会被当作无效值
+        cfg = TtsConfig.parse({"enabled": 1, "voice_id": "v1"})
+        assert cfg.enabled is False

-    def test_pitch_above_max(self):
-        config = TtsConfig.parse({"enabled": True, "pitch": 20})
-        assert config.pitch == 12
+    def test_voice_id_not_string(self):
+        """voice_id不是字符串时回退到空."""
+        cfg = TtsConfig.parse({"enabled": True, "voice_id": 123})
+        assert cfg.voice_id == ""

-    def test_pitch_within_range(self):
-        config = TtsConfig.parse({"enabled": True, "pitch": -3.5})
-        assert config.pitch == -3.5
+    def test_speed_not_number(self):
+        """speed不是数字时回退到1.0."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": "fast"})
+        assert cfg.speed == 1.0

-    def test_volume_below_min(self):
-        config = TtsConfig.parse({"enabled": True, "volume": -0.5})
-        assert config.volume == 0.0
+    def test_speed_int_accepted(self):
+        """整数speed也接受."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": 2})
+        assert cfg.speed == 2.0

-    def test_volume_above_max(self):
-        config = TtsConfig.parse({"enabled": True, "volume": 2.0})
-        assert config.volume == 1.0
+    def test_pitch_not_number(self):
+        """pitch不是数字时回退到0."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": "high"})
+        assert cfg.pitch == 0.0

-    def test_volume_within_range(self):
-        config = TtsConfig.parse({"enabled": True, "volume": 0.5})
-        assert config.volume == 0.5
+    def test_pitch_int_accepted(self):
+        """整数pitch也接受."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": 5})
+        assert cfg.pitch == 5.0

-    def test_int_speed_converted_to_float(self):
-        config = TtsConfig.parse({"enabled": True, "speed": 1})
-        assert isinstance(config.speed, float)
-        assert config.speed == 1.0
+    def test_volume_not_number(self):
+        """volume不是数字时回退到0.8."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": "loud"})
+        assert cfg.volume == 0.8

-    def test_int_pitch_converted_to_float(self):
-        config = TtsConfig.parse({"enabled": True, "pitch": 2})
-        assert isinstance(config.pitch, float)
-        assert config.pitch == 2.0
+    def test_volume_int_accepted(self):
+        """整数volume也接受."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": 1})
+        assert cfg.volume == 1.0

-    def test_int_volume_converted_to_float(self):
-        config = TtsConfig.parse({"enabled": True, "volume": 1})
-        assert isinstance(config.volume, float)
-        assert config.volume == 1.0
+    def test_text_not_string(self):
+        """text不是字符串时回退到空."""
+        cfg = TtsConfig.parse({"enabled": True, "text": 12345})
+        assert cfg.text == ""
+
+    def test_text_empty_string(self):
+        """空文本字符串是有效的."""
+        cfg = TtsConfig.parse({"enabled": True, "text": ""})
+        assert cfg.text == ""
+
+
+# ── parse - 边界钳制测试 ─────────────────────────────────────────────────────
+
+
+class TestTtsConfigParseClamping:
+    """TtsConfig.parse 边界钳制测试."""
+
+    # speed 边界
+
+    def test_speed_below_min_clamped(self):
+        """语速低于最小值钳制到0.5."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": 0.1})
+        assert cfg.speed == 0.5
+
+    def test_speed_negative_clamped(self):
+        """负语速钳制到0.5."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": -1.0})
+        assert cfg.speed == 0.5
+
+    def test_speed_above_max_clamped(self):
+        """语速高于最大值钳制到2.0."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": 5.0})
+        assert cfg.speed == 2.0
+
+    def test_speed_at_min_ok(self):
+        """刚好等于最小值正常."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": 0.5})
+        assert cfg.speed == 0.5
+
+    def test_speed_at_max_ok(self):
+        """刚好等于最大值正常."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": 2.0})
+        assert cfg.speed == 2.0
+
+    def test_speed_normal_ok(self):
+        """正常范围内语速保持不变."""
+        cfg = TtsConfig.parse({"enabled": True, "speed": 1.5})
+        assert cfg.speed == 1.5
+
+    # pitch 边界
+
+    def test_pitch_below_min_clamped(self):
+        """语调低于最小值钳制到-12."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": -20})
+        assert cfg.pitch == -12
+
+    def test_pitch_above_max_clamped(self):
+        """语调高于最大值钳制到12."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": 20})
+        assert cfg.pitch == 12
+
+    def test_pitch_at_min_ok(self):
+        """刚好等于最小值正常."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": -12})
+        assert cfg.pitch == -12
+
+    def test_pitch_at_max_ok(self):
+        """刚好等于最大值正常."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": 12})
+        assert cfg.pitch == 12
+
+    def test_pitch_normal_ok(self):
+        """正常范围内语调保持不变."""
+        cfg = TtsConfig.parse({"enabled": True, "pitch": 3.5})
+        assert cfg.pitch == 3.5
+
+    # volume 边界
+
+    def test_volume_below_min_clamped(self):
+        """音量低于最小值钳制到0."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": -0.5})
+        assert cfg.volume == 0.0
+
+    def test_volume_above_max_clamped(self):
+        """音量高于最大值钳制到1."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": 2.0})
+        assert cfg.volume == 1.0
+
+    def test_volume_at_min_ok(self):
+        """刚好等于最小值正常."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": 0.0})
+        assert cfg.volume == 0.0
+
+    def test_volume_at_max_ok(self):
+        """刚好等于最大值正常."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": 1.0})
+        assert cfg.volume == 1.0
+
+    def test_volume_normal_ok(self):
+        """正常范围内音量保持不变."""
+        cfg = TtsConfig.parse({"enabled": True, "volume": 0.6})
+        assert cfg.volume == 0.6
+
+
+# ── parse - 枚举值校验测试 ───────────────────────────────────────────────────
+
+
+class TestTtsConfigParseEnumValues:
+    """TtsConfig.parse 枚举值校验测试."""
+
+    # align_mode
+
+    def test_align_mode_subtitle(self):
+        """subtitle对齐模式有效."""
+        cfg = TtsConfig.parse({"enabled": True, "align_mode": "subtitle"})
+        assert cfg.align_mode == "subtitle"
+
+    def test_align_mode_full(self):
+        """full对齐模式有效."""
+        cfg = TtsConfig.parse({"enabled": True, "align_mode": "full"})
+        assert cfg.align_mode == "full"
+
+    def test_align_mode_invalid_fallback(self):
+        """无效align_mode回退到full."""
+        cfg = TtsConfig.parse({"enabled": True, "align_mode": "word_by_word"})
+        assert cfg.align_mode == "full"
+
+    # overlap_mode
+
+    def test_overlap_mode_replace(self):
+        """replace叠加模式有效."""
+        cfg = TtsConfig.parse({"enabled": True, "overlap_mode": "replace"})
+        assert cfg.overlap_mode == "replace"
+
+    def test_overlap_mode_mix(self):
+        """mix叠加模式有效."""
+        cfg = TtsConfig.parse({"enabled": True, "overlap_mode": "mix"})
+        assert cfg.overlap_mode == "mix"
+
+    def test_overlap_mode_invalid_fallback(self):
+        """无效overlap_mode回退到replace."""
+        cfg = TtsConfig.parse({"enabled": True, "overlap_mode": "duck"})
+        assert cfg.overlap_mode == "replace"
+
+
+# ── _clamp 直接测试 ──────────────────────────────────────────────────────────
+
+
+class TestTtsConfigClampDirect:
+    """_clamp 方法直接调用测试."""
+
+    def test_clamp_speed_low(self):
+        """手动构造低语速再clamp."""
+        cfg = TtsConfig(enabled=True, speed=0.1)
+        cfg._clamp()
+        assert cfg.speed == 0.5
+
+    def test_clamp_speed_high(self):
+        """手动构造高速再clamp."""
+        cfg = TtsConfig(enabled=True, speed=10)
+        cfg._clamp()
+        assert cfg.speed == 2.0
+
+    def test_clamp_pitch_low(self):
+        """手动构造低调再clamp."""
+        cfg = TtsConfig(enabled=True, pitch=-20)
+        cfg._clamp()
+        assert cfg.pitch == -12
+
+    def test_clamp_pitch_high(self):
+        """手动构造高调再clamp."""
+        cfg = TtsConfig(enabled=True, pitch=20)
+        cfg._clamp()
+        assert cfg.pitch == 12
+
+    def test_clamp_volume_low(self):
+        """手动构造低音量再clamp."""
+        cfg = TtsConfig(enabled=True, volume=-1)
+        cfg._clamp()
+        assert cfg.volume == 0.0
+
+    def test_clamp_volume_high(self):
+        """手动构造高音量再clamp."""
+        cfg = TtsConfig(enabled=True, volume=2)
+        cfg._clamp()
+        assert cfg.volume == 1.0
+
+    def test_clamp_preserves_in_range(self):
+        """范围内的值不变."""
+        cfg = TtsConfig(enabled=True, speed=1.2, pitch=3, volume=0.7)
+        cfg._clamp()
+        assert cfg.speed == 1.2
+        assert cfg.pitch == 3
+        assert cfg.volume == 0.7
+
+
+# ── is_dataclass 验证 ───────────────────────────────────────────────────────
+
+
+class TestTtsConfigStructure:
+    """TtsConfig 结构验证."""
+
+    def test_is_dataclass(self):
+        """是dataclass."""
+        from dataclasses import is_dataclass
+
+        assert is_dataclass(TtsConfig)
+
+    def test_equality(self):
+        """相同配置相等."""
+        c1 = TtsConfig(enabled=True, voice_id="v1")
+        c2 = TtsConfig(enabled=True, voice_id="v1")
+        assert c1 == c2
+
+    def test_inequality(self):
+        """不同配置不等."""
+        c1 = TtsConfig(enabled=True, voice_id="v1")
+        c2 = TtsConfig(enabled=True, voice_id="v2")
+        assert c1 != c2
@@ -1,4 +1,4 @@
-"""video_concat 领域模型单测 — 纯逻辑，48个测试用例."""
+"""video_concat 视频拼接领域模型单元测试."""

 from __future__ import annotations

@@ -12,125 +12,192 @@ from packages.domain.video_concat import (
    ConcatSegment,
 )

+# ── 常量测试 ──────────────────────────────────────────────────────────────────
+
+
+class TestConstants:
+    """常量测试."""
+
+    def test_max_concat_segments(self):
+        """最大拼接段数."""
+        assert MAX_CONCAT_SEGMENTS == 50
+
+    def test_allowed_extensions_not_empty(self):
+        """支持的视频格式不为空."""
+        assert len(ALLOWED_VIDEO_EXTENSIONS) > 0
+
+    def test_common_formats_supported(self):
+        """常见格式都支持."""
+        assert ".mp4" in ALLOWED_VIDEO_EXTENSIONS
+        assert ".mov" in ALLOWED_VIDEO_EXTENSIONS
+        assert ".avi" in ALLOWED_VIDEO_EXTENSIONS
+        assert ".mkv" in ALLOWED_VIDEO_EXTENSIONS
+        assert ".webm" in ALLOWED_VIDEO_EXTENSIONS
+
+    def test_demuxer_params_not_empty(self):
+        """demuxer必需参数不为空."""
+        assert len(CONCAT_DEMUXER_REQUIRED_PARAMS) > 0
+
+    def test_demuxer_params_include_codec(self):
+        """包含编解码相关参数."""
+        assert "codec_name" in CONCAT_DEMUXER_REQUIRED_PARAMS
+        assert "width" in CONCAT_DEMUXER_REQUIRED_PARAMS
+        assert "height" in CONCAT_DEMUXER_REQUIRED_PARAMS
+        assert "r_frame_rate" in CONCAT_DEMUXER_REQUIRED_PARAMS
+
+
 # ── ConcatSegment 测试 ───────────────────────────────────────────────────────


-class TestConcatSegmentBasics:
-    def test_default_values(self):
-        seg = ConcatSegment(video_path="test.mp4")
-        assert seg.video_path == "test.mp4"
+class TestConcatSegment:
+    """ConcatSegment 测试."""
+
+    def test_basic_creation(self):
+        """基础创建."""
+        seg = ConcatSegment(video_path="/tmp/video.mp4")
+        assert seg.video_path == "/tmp/video.mp4"
        assert seg.start_time == 0.0
        assert seg.duration == 0.0
        assert seg.has_audio is True

-    def test_full_params(self):
+    def test_full_creation(self):
+        """完整字段创建."""
        seg = ConcatSegment(
-            video_path="video.mp4",
+            video_path="/tmp/v.mov",
            start_time=5.5,
            duration=10.0,
            has_audio=False,
        )
-        assert seg.video_path == "video.mp4"
+        assert seg.video_path == "/tmp/v.mov"
        assert seg.start_time == 5.5
        assert seg.duration == 10.0
        assert seg.has_audio is False

+    # is_valid 属性

-class TestConcatSegmentFromDict:
-    def test_normal_dict(self):
-        seg = ConcatSegment.from_dict(
-            {
-                "video_path": "test.mp4",
-                "start_time": 2.0,
-                "duration": 5.0,
-                "has_audio": False,
-            }
-        )
-        assert seg.video_path == "test.mp4"
-        assert seg.start_time == 2.0
-        assert seg.duration == 5.0
-        assert seg.has_audio is False
-
-    def test_empty_dict(self):
-        seg = ConcatSegment.from_dict({})
-        assert seg.video_path == ""
-        assert seg.start_time == 0.0
-        assert seg.duration == 0.0
-        assert seg.has_audio is True
-
-    def test_none_input(self):
-        seg = ConcatSegment.from_dict(None)
-        assert seg.video_path == ""
-        assert seg.is_valid is False
-
-    def test_non_dict_input(self):
-        seg = ConcatSegment.from_dict("not a dict")
-        assert seg.video_path == ""
-
-    def test_start_time_negative_clamped(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "start_time": -5})
-        assert seg.start_time == 0.0
-
-    def test_duration_negative_clamped(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "duration": -10})
-        assert seg.duration == 0.0
-
-    def test_start_time_invalid_string(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "start_time": "abc"})
-        assert seg.start_time == 0.0
-
-    def test_duration_invalid_string(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "duration": "xyz"})
-        assert seg.duration == 0.0
-
-    def test_start_time_int_casted(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "start_time": 3})
-        assert seg.start_time == 3.0
-
-    def test_duration_int_casted(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "duration": 7})
-        assert seg.duration == 7.0
-
-    def test_video_path_casted_to_string(self):
-        seg = ConcatSegment.from_dict({"video_path": 12345})
-        assert seg.video_path == "12345"
-
-    def test_has_audio_false(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "has_audio": False})
-        assert seg.has_audio is False
-
-    def test_has_audio_truthy_value(self):
-        seg = ConcatSegment.from_dict({"video_path": "a.mp4", "has_audio": 1})
-        assert seg.has_audio is True
-
-
-class TestConcatSegmentProperties:
    def test_is_valid_with_path(self):
-        seg = ConcatSegment(video_path="test.mp4")
+        """有视频路径是有效的."""
+        seg = ConcatSegment(video_path="/tmp/v.mp4")
        assert seg.is_valid is True

    def test_is_valid_empty_path(self):
+        """空路径无效."""
        seg = ConcatSegment(video_path="")
        assert seg.is_valid is False

    def test_effective_duration_positive(self):
-        seg = ConcatSegment(video_path="a.mp4", duration=10.5)
+        """正的effective_duration."""
+        seg = ConcatSegment(video_path="v.mp4", duration=10.5)
        assert seg.effective_duration == 10.5

    def test_effective_duration_zero(self):
-        seg = ConcatSegment(video_path="a.mp4", duration=0.0)
+        """duration为0时effective_duration为0."""
+        seg = ConcatSegment(video_path="v.mp4", duration=0)
        assert seg.effective_duration == 0.0

    def test_effective_duration_negative(self):
-        seg = ConcatSegment(video_path="a.mp4", duration=-5.0)
+        """负的duration被钳制到0."""
+        seg = ConcatSegment(video_path="v.mp4", duration=-5)
        assert seg.effective_duration == 0.0


-# ── ConcatConfig 测试 ────────────────────────────────────────────────────────
+# ── ConcatSegment.from_dict 测试 ─────────────────────────────────────────────


-class TestConcatConfigBasics:
-    def test_default_values(self):
+class TestConcatSegmentFromDict:
+    """ConcatSegment.from_dict 工厂方法测试."""
+
+    def test_none_input(self):
+        """None输入返回默认片段（空路径）."""
+        seg = ConcatSegment.from_dict(None)
+        assert seg.video_path == ""
+        assert seg.is_valid is False
+
+    def test_empty_dict(self):
+        """空dict返回默认."""
+        seg = ConcatSegment.from_dict({})
+        assert seg.video_path == ""
+
+    def test_not_dict_input(self):
+        """非dict输入安全处理."""
+        seg = ConcatSegment.from_dict("not_a_dict")
+        assert seg.video_path == ""
+
+    def test_list_input(self):
+        """list输入安全处理."""
+        seg = ConcatSegment.from_dict([1, 2, 3])
+        assert seg.video_path == ""
+
+    def test_with_video_path(self):
+        """带视频路径."""
+        seg = ConcatSegment.from_dict({"video_path": "/tmp/v.mp4"})
+        assert seg.video_path == "/tmp/v.mp4"
+        assert seg.is_valid is True
+
+    def test_with_start_time(self):
+        """带start_time."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "start_time": 3.5})
+        assert seg.start_time == 3.5
+
+    def test_start_time_negative_clamped(self):
+        """负的start_time钳制到0."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "start_time": -5})
+        assert seg.start_time == 0.0
+
+    def test_start_time_invalid_string(self):
+        """无效start_time字符串回退到0."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "start_time": "abc"})
+        assert seg.start_time == 0.0
+
+    def test_with_duration(self):
+        """带duration."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "duration": 8.5})
+        assert seg.duration == 8.5
+
+    def test_duration_negative_clamped(self):
+        """负的duration钳制到0."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "duration": -10})
+        assert seg.duration == 0.0
+
+    def test_duration_invalid_string(self):
+        """无效duration回退到0."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "duration": "xyz"})
+        assert seg.duration == 0.0
+
+    def test_has_audio_true(self):
+        """has_audio为True."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "has_audio": True})
+        assert seg.has_audio is True
+
+    def test_has_audio_false(self):
+        """has_audio为False."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "has_audio": False})
+        assert seg.has_audio is False
+
+    def test_has_audio_default_true(self):
+        """has_audio默认True."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4"})
+        assert seg.has_audio is True
+
+    def test_string_start_time(self):
+        """字符串形式的start_time."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "start_time": "2.5"})
+        assert seg.start_time == 2.5
+
+    def test_int_duration(self):
+        """整数duration."""
+        seg = ConcatSegment.from_dict({"video_path": "v.mp4", "duration": 10})
+        assert seg.duration == 10.0
+
+
+# ── ConcatConfig 基础测试 ────────────────────────────────────────────────────
+
+
+class TestConcatConfig:
+    """ConcatConfig 基础测试."""
+
+    def test_default_creation(self):
+        """默认创建."""
        cfg = ConcatConfig()
        assert cfg.segments == []
        assert cfg.output_width == 0
@@ -141,224 +208,294 @@ class TestConcatConfigBasics:
        assert cfg.transition_duration == 0.3

    def test_with_segments(self):
-        segs = [ConcatSegment(video_path="a.mp4")]
-        cfg = ConcatConfig(segments=segs)
-        assert len(cfg.segments) == 1
-        assert cfg.segments[0].video_path == "a.mp4"
-
-
-class TestConcatConfigFromDict:
-    def test_none_config(self):
-        cfg = ConcatConfig.from_config_dict(None)
-        assert cfg.segments == []
-        assert cfg.output_width == 0
-
-    def test_empty_dict(self):
-        cfg = ConcatConfig.from_config_dict({})
-        assert cfg.segments == []
-
-    def test_non_dict_input(self):
-        cfg = ConcatConfig.from_config_dict("config")
-        assert cfg.segments == []
-
-    def test_with_valid_segments(self):
-        cfg = ConcatConfig.from_config_dict(
-            {
-                "segments": [
-                    {"video_path": "a.mp4", "duration": 10},
-                    {"video_path": "b.mp4", "duration": 20},
-                ],
-            }
-        )
+        """带片段创建."""
+        segs = [ConcatSegment(video_path="v1.mp4"), ConcatSegment(video_path="v2.mp4")]
+        cfg = ConcatConfig(segments=segs, output_width=1920, output_height=1080)
        assert len(cfg.segments) == 2
-        assert cfg.segments[0].video_path == "a.mp4"
-        assert cfg.segments[1].video_path == "b.mp4"
-
-    def test_skips_empty_video_path(self):
-        cfg = ConcatConfig.from_config_dict(
-            {
-                "segments": [
-                    {"video_path": "a.mp4"},
-                    {"video_path": ""},
-                    {"video_path": "b.mp4"},
-                ],
-            }
-        )
-        assert len(cfg.segments) == 2
-
-    def test_skips_invalid_segment_dict(self):
-        cfg = ConcatConfig.from_config_dict(
-            {
-                "segments": [
-                    {"video_path": "a.mp4"},
-                    "not a dict",
-                    {"video_path": "b.mp4"},
-                ],
-            }
-        )
-        assert len(cfg.segments) == 2
-
-    def test_segments_not_a_list(self):
-        cfg = ConcatConfig.from_config_dict({"segments": "not a list"})
-        assert cfg.segments == []
-
-    def test_output_params(self):
-        cfg = ConcatConfig.from_config_dict(
-            {
-                "output_width": 1920,
-                "output_height": 1080,
-                "output_fps": 30.0,
-                "force_reencode": True,
-            }
-        )
        assert cfg.output_width == 1920
        assert cfg.output_height == 1080
-        assert cfg.output_fps == 30.0
-        assert cfg.force_reencode is True

-    def test_output_width_negative_clamped(self):
-        cfg = ConcatConfig.from_config_dict({"output_width": -100})
-        assert cfg.output_width == 0
+    # 属性测试

-    def test_output_height_invalid_string(self):
-        cfg = ConcatConfig.from_config_dict({"output_height": "abc"})
-        assert cfg.output_height == 0
-
-    def test_output_fps_invalid_string(self):
-        cfg = ConcatConfig.from_config_dict({"output_fps": "xyz"})
-        assert cfg.output_fps == 0.0
-
-    def test_transition_params(self):
-        cfg = ConcatConfig.from_config_dict(
-            {
-                "transition": "crossfade",
-                "transition_duration": 1.0,
-            }
-        )
-        assert cfg.transition == "crossfade"
-        assert cfg.transition_duration == 1.0
-
-    def test_transition_duration_minimum(self):
-        cfg = ConcatConfig.from_config_dict({"transition_duration": 0.01})
-        assert cfg.transition_duration == 0.1
-
-    def test_transition_duration_negative(self):
-        cfg = ConcatConfig.from_config_dict({"transition_duration": -1})
-        assert cfg.transition_duration == 0.1
-
-    def test_force_reencode_false_by_default(self):
-        cfg = ConcatConfig.from_config_dict({})
-        assert cfg.force_reencode is False
-
-
-class TestConcatConfigProperties:
-    def test_has_effect_two_segments(self):
+    def test_has_effect_with_two_segments(self):
+        """2个以上有效片段has_effect为True."""
        cfg = ConcatConfig(
            segments=[
-                ConcatSegment(video_path="a.mp4"),
-                ConcatSegment(video_path="b.mp4"),
+                ConcatSegment(video_path="v1.mp4"),
+                ConcatSegment(video_path="v2.mp4"),
            ]
        )
        assert cfg.has_effect is True

-    def test_has_effect_one_segment(self):
-        cfg = ConcatConfig(segments=[ConcatSegment(video_path="a.mp4")])
+    def test_has_effect_with_one_segment(self):
+        """只有1个有效片段has_effect为False."""
+        cfg = ConcatConfig(segments=[ConcatSegment(video_path="v1.mp4")])
        assert cfg.has_effect is False

-    def test_has_effect_empty(self):
+    def test_has_effect_with_no_segments(self):
+        """空片段has_effect为False."""
        cfg = ConcatConfig()
        assert cfg.has_effect is False

-    def test_has_effect_skips_invalid(self):
-        cfg = ConcatConfig(
-            segments=[
-                ConcatSegment(video_path="a.mp4"),
-                ConcatSegment(video_path=""),
-                ConcatSegment(video_path="b.mp4"),
-            ]
-        )
-        assert cfg.has_effect is True
-
    def test_valid_segment_count(self):
+        """有效片段计数."""
        cfg = ConcatConfig(
            segments=[
-                ConcatSegment(video_path="a.mp4"),
-                ConcatSegment(video_path=""),
-                ConcatSegment(video_path="b.mp4"),
+                ConcatSegment(video_path="v1.mp4"),
+                ConcatSegment(video_path=""),  # 无效
+                ConcatSegment(video_path="v2.mp4"),
            ]
        )
        assert cfg.valid_segment_count == 2

-    def test_first_valid_segment(self):
+    def test_total_segments_alias(self):
+        """total_segments是valid_segment_count的别名."""
        cfg = ConcatConfig(
            segments=[
-                ConcatSegment(video_path=""),
-                ConcatSegment(video_path="first.mp4"),
+                ConcatSegment(video_path="v1.mp4"),
+                ConcatSegment(video_path="v2.mp4"),
+            ]
+        )
+        assert cfg.total_segments == cfg.valid_segment_count
+        assert cfg.total_segments == 2
+
+    def test_first_valid_segment(self):
+        """第一个有效片段."""
+        cfg = ConcatConfig(
+            segments=[
+                ConcatSegment(video_path=""),  # 无效
+                ConcatSegment(video_path="first_valid.mp4"),
                ConcatSegment(video_path="second.mp4"),
            ]
        )
-        assert cfg.first_valid_segment is not None
-        assert cfg.first_valid_segment.video_path == "first.mp4"
+        first = cfg.first_valid_segment
+        assert first is not None
+        assert first.video_path == "first_valid.mp4"

-    def test_first_valid_segment_none_when_all_empty(self):
-        cfg = ConcatConfig(
-            segments=[
-                ConcatSegment(video_path=""),
-                ConcatSegment(video_path=""),
-            ]
-        )
+    def test_first_valid_segment_none(self):
+        """无有效片段时first_valid_segment为None."""
+        cfg = ConcatConfig(segments=[ConcatSegment(video_path="")])
        assert cfg.first_valid_segment is None

-    def test_first_valid_segment_empty_list(self):
+    def test_first_valid_segment_empty(self):
+        """空列表时为None."""
        cfg = ConcatConfig()
        assert cfg.first_valid_segment is None

    def test_estimated_total_duration(self):
+        """估算总时长."""
        cfg = ConcatConfig(
            segments=[
-                ConcatSegment(video_path="a.mp4", duration=10.0),
-                ConcatSegment(video_path="b.mp4", duration=20.0),
-                ConcatSegment(video_path="c.mp4", duration=0.0),
+                ConcatSegment(video_path="v1.mp4", duration=10.0),
+                ConcatSegment(video_path="v2.mp4", duration=5.5),
+                ConcatSegment(video_path="v3.mp4", duration=0),  # 不计入
            ]
        )
-        assert cfg.estimated_total_duration == 30.0
+        assert cfg.estimated_total_duration == pytest.approx(15.5)
+
+    def test_estimated_total_duration_empty(self):
+        """空片段时长为0."""
+        cfg = ConcatConfig()
+        assert cfg.estimated_total_duration == 0.0

    def test_estimated_total_duration_skips_invalid(self):
+        """跳过无效片段."""
        cfg = ConcatConfig(
            segments=[
-                ConcatSegment(video_path="", duration=10.0),
-                ConcatSegment(video_path="a.mp4", duration=5.0),
+                ConcatSegment(video_path="", duration=100),  # 无效，跳过
+                ConcatSegment(video_path="v1.mp4", duration=5.0),
            ]
        )
        assert cfg.estimated_total_duration == 5.0


-class TestConcatConfigClampSegments:
-    def test_clamp_when_over_max(self):
-        segs = [ConcatSegment(video_path=f"s{i}.mp4") for i in range(100)]
-        cfg = ConcatConfig(segments=segs)
-        cfg.clamp_segments(50)
-        assert len(cfg.segments) == 50
-        assert cfg.segments[0].video_path == "s0.mp4"
-        assert cfg.segments[-1].video_path == "s49.mp4"
+# ── ConcatConfig.from_config_dict 测试 ───────────────────────────────────────

-    def test_no_clamp_when_under_max(self):
-        segs = [ConcatSegment(video_path=f"s{i}.mp4") for i in range(10)]
+
+class TestConcatConfigFromConfigDict:
+    """ConcatConfig.from_config_dict 工厂方法测试."""
+
+    def test_none_config(self):
+        """None返回默认配置."""
+        cfg = ConcatConfig.from_config_dict(None)
+        assert cfg.segments == []
+        assert cfg.output_width == 0
+
+    def test_empty_config(self):
+        """空dict返回默认."""
+        cfg = ConcatConfig.from_config_dict({})
+        assert cfg.segments == []
+
+    def test_not_dict(self):
+        """非dict安全处理."""
+        cfg = ConcatConfig.from_config_dict("not_dict")
+        assert cfg.segments == []
+
+    def test_with_segments(self):
+        """带片段列表."""
+        cfg = ConcatConfig.from_config_dict(
+            {
+                "segments": [
+                    {"video_path": "v1.mp4", "duration": 10},
+                    {"video_path": "v2.mp4", "start_time": 2},
+                ]
+            }
+        )
+        assert len(cfg.segments) == 2
+        assert cfg.segments[0].video_path == "v1.mp4"
+        assert cfg.segments[0].duration == 10.0
+        assert cfg.segments[1].start_time == 2.0
+
+    def test_segments_not_list(self):
+        """segments不是list时忽略."""
+        cfg = ConcatConfig.from_config_dict({"segments": "not_a_list"})
+        assert cfg.segments == []
+
+    def test_skips_segments_without_path(self):
+        """跳过没有video_path的片段."""
+        cfg = ConcatConfig.from_config_dict(
+            {
+                "segments": [
+                    {"video_path": "v1.mp4"},
+                    {"duration": 5},  # 没有video_path
+                    {"video_path": ""},  # 空path
+                ]
+            }
+        )
+        assert len(cfg.segments) == 1
+        assert cfg.segments[0].video_path == "v1.mp4"
+
+    def test_skips_non_dict_segments(self):
+        """跳过非dict片段."""
+        cfg = ConcatConfig.from_config_dict(
+            {
+                "segments": [
+                    {"video_path": "v1.mp4"},
+                    "not_a_dict",
+                    None,
+                    123,
+                ]
+            }
+        )
+        assert len(cfg.segments) == 1
+
+    def test_output_dimensions(self):
+        """输出尺寸."""
+        cfg = ConcatConfig.from_config_dict(
+            {
+                "output_width": 1920,
+                "output_height": 1080,
+            }
+        )
+        assert cfg.output_width == 1920
+        assert cfg.output_height == 1080
+
+    def test_output_dimensions_negative_clamped(self):
+        """负的尺寸钳制到0."""
+        cfg = ConcatConfig.from_config_dict(
+            {
+                "output_width": -100,
+                "output_height": -50,
+            }
+        )
+        assert cfg.output_width == 0
+        assert cfg.output_height == 0
+
+    def test_output_dimensions_invalid(self):
+        """无效尺寸回退到0."""
+        cfg = ConcatConfig.from_config_dict(
+            {
+                "output_width": "abc",
+                "output_height": "xyz",
+            }
+        )
+        assert cfg.output_width == 0
+        assert cfg.output_height == 0
+
+    def test_output_fps(self):
+        """输出帧率."""
+        cfg = ConcatConfig.from_config_dict({"output_fps": 30.0})
+        assert cfg.output_fps == 30.0
+
+    def test_output_fps_negative_clamped(self):
+        """负帧率钳制到0."""
+        cfg = ConcatConfig.from_config_dict({"output_fps": -5})
+        assert cfg.output_fps == 0.0
+
+    def test_force_reencode(self):
+        """强制重新编码."""
+        cfg = ConcatConfig.from_config_dict({"force_reencode": True})
+        assert cfg.force_reencode is True
+
+    def test_force_reencode_default_false(self):
+        """默认不强制重编码."""
+        cfg = ConcatConfig.from_config_dict({})
+        assert cfg.force_reencode is False
+
+    def test_transition(self):
+        """转场效果."""
+        cfg = ConcatConfig.from_config_dict({"transition": "crossfade"})
+        assert cfg.transition == "crossfade"
+
+    def test_transition_default_none(self):
+        """默认转场none."""
+        cfg = ConcatConfig.from_config_dict({})
+        assert cfg.transition == "none"
+
+    def test_transition_duration(self):
+        """转场时长."""
+        cfg = ConcatConfig.from_config_dict({"transition_duration": 1.0})
+        assert cfg.transition_duration == 1.0
+
+    def test_transition_duration_min(self):
+        """转场时长最小值0.1."""
+        cfg = ConcatConfig.from_config_dict({"transition_duration": 0.01})
+        assert cfg.transition_duration == 0.1
+
+    def test_transition_duration_invalid(self):
+        """无效转场时长回退到默认."""
+        cfg = ConcatConfig.from_config_dict({"transition_duration": "invalid"})
+        assert cfg.transition_duration == 0.3
+
+
+# ── clamp_segments 测试 ──────────────────────────────────────────────────────
+
+
+class TestClampSegments:
+    """clamp_segments 截断测试."""
+
+    def test_under_limit_no_change(self):
+        """低于上限时不截断."""
+        segs = [ConcatSegment(video_path=f"v{i}.mp4") for i in range(10)]
        cfg = ConcatConfig(segments=segs)
-        cfg.clamp_segments(50)
+        cfg.clamp_segments(max_segments=50)
        assert len(cfg.segments) == 10

-    def test_default_max_constant(self):
-        assert MAX_CONCAT_SEGMENTS == 50
+    def test_over_limit_truncated(self):
+        """超过上限时截断."""
+        segs = [ConcatSegment(video_path=f"v{i}.mp4") for i in range(100)]
+        cfg = ConcatConfig(segments=segs)
+        cfg.clamp_segments(max_segments=30)
+        assert len(cfg.segments) == 30
+        assert cfg.segments[0].video_path == "v0.mp4"
+        assert cfg.segments[-1].video_path == "v29.mp4"

+    def test_default_max_uses_constant(self):
+        """默认max_segments使用常量."""
+        segs = [ConcatSegment(video_path=f"v{i}.mp4") for i in range(100)]
+        cfg = ConcatConfig(segments=segs)
+        cfg.clamp_segments()  # 默认MAX_CONCAT_SEGMENTS
+        assert len(cfg.segments) == MAX_CONCAT_SEGMENTS

-class TestConstants:
-    def test_allowed_extensions(self):
-        assert ".mp4" in ALLOWED_VIDEO_EXTENSIONS
-        assert ".mov" in ALLOWED_VIDEO_EXTENSIONS
-        assert ".webm" in ALLOWED_VIDEO_EXTENSIONS
+    def test_empty_segments(self):
+        """空列表不报错."""
+        cfg = ConcatConfig()
+        cfg.clamp_segments()
+        assert cfg.segments == []

-    def test_demuxer_params(self):
-        assert "codec_name" in CONCAT_DEMUXER_REQUIRED_PARAMS
-        assert "width" in CONCAT_DEMUXER_REQUIRED_PARAMS
-        assert "r_frame_rate" in CONCAT_DEMUXER_REQUIRED_PARAMS
+    def test_at_limit_stays(self):
+        """刚好在上限时不变."""
+        segs = [ConcatSegment(video_path=f"v{i}.mp4") for i in range(50)]
+        cfg = ConcatConfig(segments=segs)
+        cfg.clamp_segments(max_segments=50)
+        assert len(cfg.segments) == 50
@@ -1,306 +1,650 @@
-"""VoiceCloneProfile 领域模型单元测试 — Phase 3 CosyVoice 集成."""
+"""VoiceCloneProfile 领域模型单元测试."""

 from __future__ import annotations

+from datetime import datetime, timezone
+from time import sleep
+
 import pytest

-from packages.domain.voice_clone_profile import VoiceCloneProfile, VoiceCloneStatus
+from packages.domain.voice_clone_profile import (
+    TERMINAL_STATUSES,
+    VoiceCloneProfile,
+    VoiceCloneStatus,
+)
+
+# ── 枚举测试 ──────────────────────────────────────────────────────────────────
+
+
+class TestVoiceCloneStatus:
+    """VoiceCloneStatus 枚举测试."""
+
+    def test_status_values(self):
+        """状态值正确."""
+        assert VoiceCloneStatus.PENDING.value == "pending"
+        assert VoiceCloneStatus.PROCESSING.value == "processing"
+        assert VoiceCloneStatus.READY.value == "ready"
+        assert VoiceCloneStatus.FAILED.value == "failed"
+        assert VoiceCloneStatus.DISABLED.value == "disabled"
+
+    def test_status_count(self):
+        """共5种状态."""
+        assert len(VoiceCloneStatus) == 5
+
+    def test_is_str_enum(self):
+        """是StrEnum，可与字符串直接比较."""
+        assert VoiceCloneStatus.PENDING == "pending"
+        assert VoiceCloneStatus.READY + "" == "ready"
+
+    def test_from_string(self):
+        """从字符串构建枚举."""
+        assert VoiceCloneStatus("pending") == VoiceCloneStatus.PENDING
+        assert VoiceCloneStatus("ready") == VoiceCloneStatus.READY
+
+    def test_from_string_invalid(self):
+        """无效字符串抛出ValueError."""
+        with pytest.raises(ValueError):
+            VoiceCloneStatus("invalid_status")
+
+
+# ── 终态集合测试 ──────────────────────────────────────────────────────────────
+
+
+class TestTerminalStatuses:
+    """TERMINAL_STATUSES 终态集合测试."""
+
+    def test_ready_is_terminal(self):
+        """ready是终态."""
+        assert VoiceCloneStatus.READY in TERMINAL_STATUSES
+
+    def test_failed_is_terminal(self):
+        """failed是终态."""
+        assert VoiceCloneStatus.FAILED in TERMINAL_STATUSES
+
+    def test_disabled_is_terminal(self):
+        """disabled是终态."""
+        assert VoiceCloneStatus.DISABLED in TERMINAL_STATUSES
+
+    def test_pending_not_terminal(self):
+        """pending不是终态."""
+        assert VoiceCloneStatus.PENDING not in TERMINAL_STATUSES
+
+    def test_processing_not_terminal(self):
+        """processing不是终态."""
+        assert VoiceCloneStatus.PROCESSING not in TERMINAL_STATUSES
+
+    def test_terminal_count(self):
+        """共3个终态."""
+        assert len(TERMINAL_STATUSES) == 3
+
+
+# ── 工厂方法测试 ──────────────────────────────────────────────────────────────


 class TestVoiceCloneProfileCreate:
-    """测试 VoiceCloneProfile.create() 工厂方法。"""
+    """VoiceCloneProfile.create 工厂方法测试."""

-    def test_create_success(self) -> None:
-        """正常创建音色克隆档案。"""
-        profile = VoiceCloneProfile.create(
-            user_id="user_001",
-            name="我的音色",
-            description="用于配音的自定义音色",
-            source_audio_url="https://example.com/audio.wav",
-            voice_model="cosyvoice-v1",
-            language="zh-CN",
-            gender="female",
-        )
+    def test_create_basic(self):
+        """基础创建."""
+        p = VoiceCloneProfile.create(user_id="user123", name="我的音色")
+        assert p.id  # 自动生成
+        assert p.user_id == "user123"
+        assert p.name == "我的音色"
+        assert p.status == VoiceCloneStatus.PENDING
+        assert p.retry_count == 0
+        assert p.max_retries == 3

-        assert profile.id
-        assert profile.user_id == "user_001"
-        assert profile.name == "我的音色"
-        assert profile.description == "用于配音的自定义音色"
-        assert profile.status == VoiceCloneStatus.PENDING
-        assert profile.source_audio_url == "https://example.com/audio.wav"
-        assert profile.voice_model == "cosyvoice-v1"
-        assert profile.language == "zh-CN"
-        assert profile.gender == "female"
-        assert profile.retry_count == 0
-        assert profile.max_retries == 3
-        assert profile.created_at
-        assert profile.updated_at
+    def test_create_with_description(self):
+        """带描述创建."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", description="  测试描述  ")
+        assert p.description == "测试描述"  # strip了

-    def test_create_minimal(self) -> None:
-        """使用最小参数创建。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试音色")
+    def test_create_with_source_audio(self):
+        """带源音频URL创建."""
+        url = "https://example.com/audio.wav"
+        p = VoiceCloneProfile.create(user_id="u1", name="T", source_audio_url=url)
+        assert p.source_audio_url == url

-        assert profile.user_id == "user_001"
-        assert profile.name == "测试音色"
-        assert profile.status == VoiceCloneStatus.PENDING
-        assert profile.description == ""
-        assert profile.source_audio_url == ""
-        assert profile.language == "zh-CN"
-        assert profile.gender == "unknown"
+    def test_create_with_language(self):
+        """指定语言."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", language="en-US")
+        assert p.language == "en-US"

-    def test_create_empty_user_id_raises(self) -> None:
-        """空 user_id 应抛出 ValueError。"""
-        with pytest.raises(ValueError, match="user_id 不能为空"):
-            VoiceCloneProfile.create(user_id="", name="测试")
+    def test_create_gender_normalized(self):
+        """性别自动转小写."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", gender="Male")
+        assert p.gender == "male"

-    def test_create_whitespace_user_id_raises(self) -> None:
-        """空白 user_id 应抛出 ValueError。"""
-        with pytest.raises(ValueError, match="user_id 不能为空"):
-            VoiceCloneProfile.create(user_id="   ", name="测试")
+    def test_create_custom_max_retries(self):
+        """自定义最大重试次数."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", max_retries=5)
+        assert p.max_retries == 5

-    def test_create_empty_name_raises(self) -> None:
-        """空 name 应抛出 ValueError。"""
-        with pytest.raises(ValueError, match="name 不能为空"):
-            VoiceCloneProfile.create(user_id="user_001", name="")
+    def test_create_metadata(self):
+        """元数据."""
+        meta = {"age": 30, "accent": "北方"}
+        p = VoiceCloneProfile.create(user_id="u1", name="T", metadata=meta)
+        assert p.metadata == meta
+        # 不是同一个对象引用（深拷贝？）
+        assert p.metadata is not meta or p.metadata == meta

-    def test_create_name_too_long_raises(self) -> None:
-        """name 超过 100 字符应抛出 ValueError。"""
-        with pytest.raises(ValueError, match="name 长度不能超过 100 字符"):
-            VoiceCloneProfile.create(user_id="user_001", name="a" * 101)
+    def test_create_metadata_none(self):
+        """metadata为None时默认为空dict."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", metadata=None)
+        assert p.metadata == {}

-    def test_create_strips_whitespace(self) -> None:
-        """应去除首尾空白。"""
-        profile = VoiceCloneProfile.create(
-            user_id="  user_001  ",
-            name="  测试音色  ",
-            description="  描述  ",
-        )
+    def test_create_user_id_stripped(self):
+        """user_id去除空白."""
+        p = VoiceCloneProfile.create(user_id="  user123  ", name="T")
+        assert p.user_id == "user123"

-        assert profile.user_id == "user_001"
-        assert profile.name == "测试音色"
-        assert profile.description == "描述"
+    def test_create_name_stripped(self):
+        """name去除空白."""
+        p = VoiceCloneProfile.create(user_id="u1", name="  我的音色  ")
+        assert p.name == "我的音色"

-    def test_create_gender_normalized(self) -> None:
-        """gender 应转换为小写。"""
-        profile = VoiceCloneProfile.create(
-            user_id="user_001",
-            name="测试",
-            gender="FEMALE",
-        )
+    def test_create_empty_user_id(self):
+        """空user_id抛错."""
+        with pytest.raises(ValueError, match="user_id"):
+            VoiceCloneProfile.create(user_id="", name="T")

-        assert profile.gender == "female"
+    def test_create_whitespace_user_id(self):
+        """纯空白user_id抛错."""
+        with pytest.raises(ValueError, match="user_id"):
+            VoiceCloneProfile.create(user_id="   ", name="T")
+
+    def test_create_empty_name(self):
+        """空name抛错."""
+        with pytest.raises(ValueError, match="name"):
+            VoiceCloneProfile.create(user_id="u1", name="")
+
+    def test_create_whitespace_name(self):
+        """纯空白name抛错."""
+        with pytest.raises(ValueError, match="name"):
+            VoiceCloneProfile.create(user_id="u1", name="  ")
+
+    def test_create_name_too_long(self):
+        """name超过100字符抛错."""
+        long_name = "a" * 101
+        with pytest.raises(ValueError, match="100"):
+            VoiceCloneProfile.create(user_id="u1", name=long_name)
+
+    def test_create_name_exactly_100(self):
+        """name恰好100字符正常."""
+        name = "a" * 100
+        p = VoiceCloneProfile.create(user_id="u1", name=name)
+        assert p.name == name
+
+    def test_create_has_created_at(self):
+        """创建后有created_at时间戳."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        assert isinstance(p.created_at, datetime)
+        assert p.created_at.tzinfo is not None  # 有时区
+
+    def test_create_has_updated_at(self):
+        """创建后有updated_at时间戳."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        assert isinstance(p.updated_at, datetime)
+
+    def test_create_id_is_hex(self):
+        """id是32位hex字符串(uuid4 hex)."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        assert len(p.id) == 32
+        # 全部是hex字符
+        int(p.id, 16)  # 不抛错就是hex


-class TestVoiceCloneProfileStatus:
-    """测试状态相关属性和方法。"""
-
-    def test_initial_status_is_pending(self) -> None:
-        """初始状态应为 PENDING。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        assert profile.status == VoiceCloneStatus.PENDING
-
-    def test_is_terminal_pending(self) -> None:
-        """PENDING 不是终态。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        assert not profile.is_terminal
-
-    def test_is_terminal_ready(self) -> None:
-        """READY 是终态。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_ready(voice_id="voice_001")
-        assert profile.is_terminal
-
-    def test_is_terminal_failed(self) -> None:
-        """FAILED 是终态。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_failed("克隆失败")
-        assert profile.is_terminal
-
-    def test_is_retryable_not_failed(self) -> None:
-        """非 FAILED 状态不可重试。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        assert not profile.is_retryable
-
-    def test_is_retryable_failed_under_limit(self) -> None:
-        """FAILED 且未超过重试上限时可重试。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_failed("克隆失败")
-        assert profile.is_retryable
-
-    def test_is_retryable_failed_over_limit(self) -> None:
-        """超过重试上限时不可重试。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试", max_retries=1)
-        profile.mark_processing()
-        profile.mark_failed("第一次失败")
-        profile.prepare_retry()
-        profile.mark_processing()
-        profile.mark_failed("第二次失败")
-        assert not profile.is_retryable
-
-    def test_is_ready_with_voice_id(self) -> None:
-        """READY 且有 voice_id 时应返回 True。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_ready(voice_id="voice_001")
-        assert profile.is_ready
-
-    def test_is_ready_without_voice_id(self) -> None:
-        """READY 但无 voice_id 时应返回 False。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.status = VoiceCloneStatus.READY
-        profile.voice_id = ""
-        assert not profile.is_ready
+# ── 属性测试 ──────────────────────────────────────────────────────────────────


-class TestVoiceCloneProfileTransitions:
-    """测试状态转换。"""
+class TestVoiceCloneProfileProperties:
+    """VoiceCloneProfile 属性测试."""

-    def test_mark_processing(self) -> None:
-        """PENDING → PROCESSING 转换。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        assert profile.status == VoiceCloneStatus.PROCESSING
-        assert profile.error_message == ""
+    def test_is_terminal_pending(self):
+        """pending不是终态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        assert p.is_terminal is False

-    def test_mark_ready(self) -> None:
-        """PROCESSING → READY 转换。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_ready(voice_id="voice_001")
-        assert profile.status == VoiceCloneStatus.READY
-        assert profile.voice_id == "voice_001"
-        assert profile.error_message == ""
+    def test_is_terminal_processing(self):
+        """processing不是终态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        assert p.is_terminal is False

-    def test_mark_ready_empty_voice_id_raises(self) -> None:
-        """mark_ready 空 voice_id 应抛出 ValueError。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        with pytest.raises(ValueError, match="voice_id 不能为空"):
-            profile.mark_ready(voice_id="")
+    def test_is_terminal_ready(self):
+        """ready是终态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("voice_001")
+        assert p.is_terminal is True

-    def test_mark_failed(self) -> None:
-        """PROCESSING → FAILED 转换。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_failed("API 调用失败")
-        assert profile.status == VoiceCloneStatus.FAILED
-        assert profile.error_message == "API 调用失败"
+    def test_is_terminal_failed(self):
+        """failed是终态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("超时")
+        assert p.is_terminal is True

-    def test_mark_disabled_from_pending(self) -> None:
-        """PENDING → DISABLED 转换。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_disabled()
-        assert profile.status == VoiceCloneStatus.DISABLED
+    def test_is_terminal_disabled(self):
+        """disabled是终态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_disabled()
+        assert p.is_terminal is True

-    def test_mark_disabled_from_ready(self) -> None:
-        """READY → DISABLED 转换。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_ready(voice_id="voice_001")
-        profile.mark_disabled()
-        assert profile.status == VoiceCloneStatus.DISABLED
+    def test_is_retryable_failed_within_limit(self):
+        """失败且未超过重试次数，可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", max_retries=3)
+        p.mark_processing()
+        p.mark_failed("error")
+        assert p.is_retryable is True

-    def test_invalid_transition_raises(self) -> None:
-        """非法状态转换应抛出 ValueError。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
+    def test_is_retryable_failed_at_limit(self):
+        """失败但已达重试上限，不可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", max_retries=3)
+        p.mark_processing()
+        p.mark_failed("e1")
+        p.prepare_retry()  # retry_count=1
+        p.mark_processing()
+        p.mark_failed("e2")
+        p.prepare_retry()  # retry_count=2
+        p.mark_processing()
+        p.mark_failed("e3")
+        p.prepare_retry()  # retry_count=3
+        p.mark_processing()
+        p.mark_failed("e4")  # retry_count=3, max=3
+        assert p.is_retryable is False
+
+    def test_is_retryable_pending(self):
+        """pending状态不可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        assert p.is_retryable is False
+
+    def test_is_retryable_ready(self):
+        """ready状态不可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("v1")
+        assert p.is_retryable is False
+
+    def test_is_retryable_processing(self):
+        """processing状态不可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        assert p.is_retryable is False
+
+    def test_is_ready_with_voice_id(self):
+        """ready状态且有voice_id，is_ready为True."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("voice_001")
+        assert p.is_ready is True
+
+    def test_is_ready_no_voice_id(self):
+        """ready状态但无voice_id，is_ready为False."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.status = VoiceCloneStatus.READY  # 手动设为ready但无voice_id
+        p.voice_id = ""
+        assert p.is_ready is False
+
+    def test_is_ready_pending(self):
+        """pending状态is_ready为False."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        assert p.is_ready is False
+
+    def test_is_ready_failed(self):
+        """failed状态is_ready为False."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("err")
+        assert p.is_ready is False
+
+
+# ── 状态转换测试 ──────────────────────────────────────────────────────────────
+
+
+class TestTransitionTo:
+    """transition_to 状态转换测试."""
+
+    def test_pending_to_processing(self):
+        """pending → processing 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.transition_to(VoiceCloneStatus.PROCESSING)
+        assert p.status == VoiceCloneStatus.PROCESSING
+
+    def test_pending_to_failed(self):
+        """pending → failed 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.transition_to(VoiceCloneStatus.FAILED)
+        assert p.status == VoiceCloneStatus.FAILED
+
+    def test_pending_to_disabled(self):
+        """pending → disabled 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.transition_to(VoiceCloneStatus.DISABLED)
+        assert p.status == VoiceCloneStatus.DISABLED
+
+    def test_pending_to_ready_invalid(self):
+        """pending → ready 非法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
        with pytest.raises(ValueError, match="非法状态转换"):
-            profile.mark_ready(voice_id="voice_001")  # PENDING → READY 非法
+            p.transition_to(VoiceCloneStatus.READY)

-    def test_invalid_status_string_raises(self) -> None:
-        """无效状态字符串应抛出 ValueError。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
+    def test_processing_to_ready(self):
+        """processing → ready 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.transition_to(VoiceCloneStatus.READY)
+        assert p.status == VoiceCloneStatus.READY
+
+    def test_processing_to_failed(self):
+        """processing → failed 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.transition_to(VoiceCloneStatus.FAILED)
+        assert p.status == VoiceCloneStatus.FAILED
+
+    def test_processing_to_disabled(self):
+        """processing → disabled 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.transition_to(VoiceCloneStatus.DISABLED)
+        assert p.status == VoiceCloneStatus.DISABLED
+
+    def test_failed_to_pending(self):
+        """failed → pending 合法（重试）."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("err")
+        p.transition_to(VoiceCloneStatus.PENDING)
+        assert p.status == VoiceCloneStatus.PENDING
+
+    def test_failed_to_ready_invalid(self):
+        """failed → ready 非法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("err")
+        with pytest.raises(ValueError):
+            p.transition_to(VoiceCloneStatus.READY)
+
+    def test_ready_to_disabled(self):
+        """ready → disabled 合法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("v1")
+        p.transition_to(VoiceCloneStatus.DISABLED)
+        assert p.status == VoiceCloneStatus.DISABLED
+
+    def test_disabled_to_pending_invalid(self):
+        """disabled → pending 非法."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_disabled()
+        with pytest.raises(ValueError):
+            p.transition_to(VoiceCloneStatus.PENDING)
+
+    def test_transition_with_string(self):
+        """字符串输入的状态转换."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.transition_to("processing")
+        assert p.status == VoiceCloneStatus.PROCESSING
+
+    def test_transition_with_invalid_string(self):
+        """无效字符串状态抛错."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
        with pytest.raises(ValueError, match="无效状态"):
-            profile.transition_to("invalid_status")
+            p.transition_to("invalid")

-    def test_transition_to_with_string(self) -> None:
-        """支持字符串形式的状态转换。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.transition_to("processing")
-        assert profile.status == VoiceCloneStatus.PROCESSING
+    def test_transition_updates_updated_at(self):
+        """状态转换更新updated_at."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        old_updated = p.updated_at
+        sleep(0.01)
+        p.transition_to(VoiceCloneStatus.PROCESSING)
+        assert p.updated_at > old_updated
+
+    def test_transition_error_message_contains_statuses(self):
+        """错误信息包含源状态和目标状态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        with pytest.raises(ValueError) as exc_info:
+            p.transition_to(VoiceCloneStatus.READY)
+        msg = str(exc_info.value)
+        assert "pending" in msg
+        assert "ready" in msg


-class TestVoiceCloneProfileRetry:
-    """测试重试逻辑。"""
+# ── 操作方法测试 ──────────────────────────────────────────────────────────────

-    def test_prepare_retry_success(self) -> None:
-        """成功重试。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_failed("失败")
-        profile.prepare_retry()

-        assert profile.status == VoiceCloneStatus.PENDING
-        assert profile.retry_count == 1
-        assert profile.error_message == ""
-        assert profile.voice_id == ""
+class TestMarkMethods:
+    """mark_* 系列方法测试."""

-    def test_prepare_retry_not_failed_raises(self) -> None:
-        """非 FAILED 状态重试应抛出 ValueError。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
+    def test_mark_processing_clears_error(self):
+        """mark_processing 清除错误信息."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.error_message = "previous error"
+        p.mark_processing()
+        assert p.error_message == ""
+
+    def test_mark_processing_from_pending(self):
+        """从pending标记为processing."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        assert p.status == VoiceCloneStatus.PROCESSING
+
+    def test_mark_ready_with_voice_id(self):
+        """mark_ready 正常标记."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("voice_001")
+        assert p.status == VoiceCloneStatus.READY
+        assert p.voice_id == "voice_001"
+
+    def test_mark_ready_clears_error(self):
+        """mark_ready 清除错误信息."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.error_message = "some error"
+        p.mark_ready("v1")
+        assert p.error_message == ""
+
+    def test_mark_ready_empty_voice_id(self):
+        """空voice_id抛错."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        with pytest.raises(ValueError, match="voice_id"):
+            p.mark_ready("")
+
+    def test_mark_ready_whitespace_voice_id(self):
+        """纯空白voice_id抛错."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        with pytest.raises(ValueError):
+            p.mark_ready("   ")
+
+    def test_mark_ready_strips_voice_id(self):
+        """voice_id去除空白."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("  voice_001  ")
+        assert p.voice_id == "voice_001"
+
+    def test_mark_failed_sets_error(self):
+        """mark_failed 设置错误信息."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("连接超时")
+        assert p.error_message == "连接超时"
+
+    def test_mark_failed_from_pending(self):
+        """从pending直接失败."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_failed("验证失败")
+        assert p.status == VoiceCloneStatus.FAILED
+        assert p.error_message == "验证失败"
+
+    def test_mark_disabled_from_pending(self):
+        """从pending禁用."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_disabled()
+        assert p.status == VoiceCloneStatus.DISABLED
+
+    def test_mark_disabled_from_ready(self):
+        """从ready禁用."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("v1")
+        p.mark_disabled()
+        assert p.status == VoiceCloneStatus.DISABLED
+
+
+# ── 重试逻辑测试 ──────────────────────────────────────────────────────────────
+
+
+class TestPrepareRetry:
+    """prepare_retry 重试逻辑测试."""
+
+    def test_prepare_retry_basic(self):
+        """基础重试成功."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", max_retries=3)
+        p.mark_processing()
+        p.mark_failed("err")
+        p.prepare_retry()
+        assert p.status == VoiceCloneStatus.PENDING
+        assert p.retry_count == 1
+
+    def test_prepare_retry_clears_error(self):
+        """重试清除错误信息."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("big error")
+        p.prepare_retry()
+        assert p.error_message == ""
+
+    def test_prepare_retry_clears_voice_id(self):
+        """重试清除voice_id."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.voice_id = "old_voice"
+        p.mark_processing()
+        p.mark_failed("err")
+        p.prepare_retry()
+        assert p.voice_id == ""
+
+    def test_prepare_retry_not_failed(self):
+        """非failed状态不可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
        with pytest.raises(ValueError, match="不可重试"):
-            profile.prepare_retry()
-
-    def test_prepare_retry_over_limit_raises(self) -> None:
-        """超过重试上限重试应抛出 ValueError。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试", max_retries=1)
-        profile.mark_processing()
-        profile.mark_failed("第一次失败")
-        profile.prepare_retry()
-        profile.mark_processing()
-        profile.mark_failed("第二次失败")
+            p.prepare_retry()

+    def test_prepare_retry_exceeds_max(self):
+        """超过最大重试次数不可重试."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T", max_retries=1)
+        p.mark_processing()
+        p.mark_failed("e1")
+        p.prepare_retry()  # retry_count=1
+        p.mark_processing()
+        p.mark_failed("e2")
        with pytest.raises(ValueError, match="不可重试"):
-            profile.prepare_retry()
+            p.prepare_retry()
+
+    def test_prepare_retry_error_has_details(self):
+        """错误信息包含详细状态."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        with pytest.raises(ValueError) as exc_info:
+            p.prepare_retry()
+        msg = str(exc_info.value)
+        assert "pending" in msg
+        assert "retry_count" in msg
+        assert "max_retries" in msg


-class TestVoiceCloneProfileToDict:
-    """测试序列化。"""
+# ── 序列化测试 ────────────────────────────────────────────────────────────────

-    def test_to_dict_contains_all_fields(self) -> None:
-        """to_dict 应包含所有字段。"""
-        profile = VoiceCloneProfile.create(
-            user_id="user_001",
-            name="测试音色",
-            description="描述",
-            source_audio_url="https://example.com/audio.wav",
-            voice_model="cosyvoice-v1",
+
+class TestToDict:
+    """to_dict 序列化测试."""
+
+    def test_to_dict_keys(self):
+        """序列化字典包含所有预期字段."""
+        p = VoiceCloneProfile.create(user_id="u1", name="测试音色")
+        d = p.to_dict()
+        expected_keys = {
+            "id",
+            "user_id",
+            "name",
+            "description",
+            "status",
+            "source_audio_url",
+            "voice_id",
+            "voice_model",
+            "language",
+            "gender",
+            "error_message",
+            "retry_count",
+            "max_retries",
+            "is_retryable",
+            "is_ready",
+            "metadata",
+            "created_at",
+            "updated_at",
+        }
+        assert set(d.keys()) == expected_keys
+
+    def test_to_dict_values(self):
+        """序列化值正确."""
+        p = VoiceCloneProfile.create(
+            user_id="user123",
+            name="我的音色",
+            description="测试用",
            language="zh-CN",
            gender="female",
            max_retries=5,
-            metadata={"key": "value"},
+            metadata={"source": "upload"},
        )
+        d = p.to_dict()
+        assert d["user_id"] == "user123"
+        assert d["name"] == "我的音色"
+        assert d["description"] == "测试用"
+        assert d["status"] == "pending"
+        assert d["language"] == "zh-CN"
+        assert d["gender"] == "female"
+        assert d["retry_count"] == 0
+        assert d["max_retries"] == 5
+        assert d["is_retryable"] is False
+        assert d["is_ready"] is False
+        assert d["metadata"] == {"source": "upload"}

-        result = profile.to_dict()
+    def test_to_dict_ready_status(self):
+        """ready状态下序列化正确."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_ready("voice_001")
+        d = p.to_dict()
+        assert d["status"] == "ready"
+        assert d["voice_id"] == "voice_001"
+        assert d["is_ready"] is True
+        assert d["is_retryable"] is False

-        assert result["id"] == profile.id
-        assert result["user_id"] == "user_001"
-        assert result["name"] == "测试音色"
-        assert result["description"] == "描述"
-        assert result["status"] == "pending"
-        assert result["source_audio_url"] == "https://example.com/audio.wav"
-        assert result["voice_model"] == "cosyvoice-v1"
-        assert result["language"] == "zh-CN"
-        assert result["gender"] == "female"
-        assert result["retry_count"] == 0
-        assert result["max_retries"] == 5
-        assert result["is_retryable"] is False
-        assert result["is_ready"] is False
-        assert result["metadata"] == {"key": "value"}
-        assert result["created_at"] is not None
-        assert result["updated_at"] is not None
+    def test_to_dict_failed_status(self):
+        """failed状态下序列化正确."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        p.mark_failed("超时错误")
+        d = p.to_dict()
+        assert d["status"] == "failed"
+        assert d["error_message"] == "超时错误"
+        assert d["is_retryable"] is True

-    def test_to_dict_after_state_change(self) -> None:
-        """状态变更后 to_dict 应反映最新状态。"""
-        profile = VoiceCloneProfile.create(user_id="user_001", name="测试")
-        profile.mark_processing()
-        profile.mark_ready(voice_id="voice_001")
+    def test_to_dict_datetime_format(self):
+        """时间字段是ISO格式字符串."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        d = p.to_dict()
+        # ISO格式可以被datetime解析
+        datetime.fromisoformat(d["created_at"])
+        datetime.fromisoformat(d["updated_at"])

-        result = profile.to_dict()
-
-        assert result["status"] == "ready"
-        assert result["voice_id"] == "voice_001"
-        assert result["is_ready"] is True
+    def test_to_dict_with_updated_at_after_transition(self):
+        """状态转换后updated_at被序列化."""
+        p = VoiceCloneProfile.create(user_id="u1", name="T")
+        p.mark_processing()
+        d = p.to_dict()
+        assert d["updated_at"] is not None
+        assert isinstance(d["updated_at"], str)
--- a/Show More
+++ b/Show More