apps/web/src/pages/ai-avatar/AiAvatar.css

@@ -1021,3 +1021,132 @@
   font-size: 36px;
   margin-bottom: 8px;
 }
+
+/* ============================================================
+   #1809 ④⑤⑥ B-roll 弹窗：选库行 + 文案句子列表 + 自动估算提示
+   ============================================================ */
+
+/* 宽弹窗：左右两栏 + 句子列表需要更大空间 */
+.aa-modal--wide {
+  max-width: 960px;
+  width: 94%;
+}
+
+.aa-broll-modal-body .aa-broll-right {
+  width: 300px;
+}
+
+/* 左侧素材库选择行 */
+.aa-broll-lib-row {
+  margin-bottom: 10px;
+}
+
+.aa-broll-lib-row .aa-select {
+  width: 100%;
+  height: 36px;
+  border: 1px solid var(--border-color, #e2e2ea);
+  border-radius: 8px;
+  padding: 0 10px;
+  font-size: 13px;
+  background: #fff;
+  color: #1a1a2e;
+  outline: none;
+}
+
+/* 无缩略图时的素材占位 */
+.aa-broll-asset-placeholder {
+  width: 100%;
+  height: 100%;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  font-size: 18px;
+}
+
+/* 文案句子列表 */
+.aa-sentence-list {
+  max-height: 240px;
+  overflow-y: auto;
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  padding-right: 4px;
+}
+
+.aa-sentence-item {
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  width: 100%;
+  text-align: left;
+  border: 1px solid var(--border-color, #e2e2ea);
+  border-radius: 8px;
+  background: #fff;
+  padding: 8px 10px;
+  cursor: pointer;
+  transition: all 0.15s;
+}
+
+.aa-sentence-item:hover {
+  border-color: #c0c0d0;
+  background: #f8f8fc;
+}
+
+.aa-sentence-item.active {
+  border-color: #7c3aed;
+  background: #f3edff;
+}
+
+.aa-sentence-item__idx {
+  flex-shrink: 0;
+  width: 20px;
+  height: 20px;
+  border-radius: 50%;
+  background: #f0f0f5;
+  color: #6b6b80;
+  font-size: 11px;
+  font-weight: 600;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.aa-sentence-item.active .aa-sentence-item__idx {
+  background: #7c3aed;
+  color: #fff;
+}
+
+.aa-sentence-item__text {
+  flex: 1;
+  font-size: 12px;
+  line-height: 1.5;
+  color: #1a1a2e;
+  word-break: break-all;
+}
+
+.aa-sentence-item__time {
+  flex-shrink: 0;
+  font-size: 10px;
+  color: #8c8ca1;
+  margin-top: 2px;
+}
+
+.aa-sentence-empty {
+  font-size: 12px;
+  color: #8c8ca1;
+  background: #f8f8fc;
+  border-radius: 8px;
+  padding: 10px;
+}
+
+/* 选择/估算提示 */
+.aa-broll-hint {
+  font-size: 12px;
+  color: #059669;
+  background: #f8f8fc;
+  border-radius: 6px;
+  padding: 8px 10px;
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}

apps/web/src/pages/ai-avatar/AiAvatarPage.tsx

@@ -3,6 +3,7 @@
  * 5列水平面板布局
  */
 import React, { useState, useCallback, useEffect, useRef } from "react"
+import { message } from "antd"
 import "./AiAvatar.css"
 import { useAiAvatar } from "./hooks/useAiAvatar"
 import { PanelVideoSelector } from "./components/PanelVideoSelector"
@@ -13,7 +14,6 @@ import PanelCoverAndGenerate from "./components/PanelCoverAndGenerate"
 import { ModalAssetPicker } from "./components/ModalAssetPicker"
 import ModalBRollEditor from "./components/ModalBRollEditor"
 import { getScripts, createLipsyncJob, getLipsyncJob, submitRender } from "./api/aiAvatar"
-import { getAssetsByKind } from "@/api/assets"
 
 /** 面板折叠状态 */
 type PanelKey = "video" | "voice" | "script" | "title" | "cover"
@@ -28,9 +28,6 @@ const AiAvatarPage: React.FC = () => {
     cover: false,
   })
 
-  /* ── 素材库弹窗 ── */
-  const [bRollAssets, setBRollAssets] = useState<import("@/api/assets").AssetItem[]>([])
-
   /* ── 对口型轮询 ── */
   const lipsyncTimerRef = useRef<ReturnType<typeof setInterval> | null>(null)
 
@@ -40,14 +37,26 @@ const AiAvatarPage: React.FC = () => {
 
   /* ── 对口型 ── */
   const handleGenerateLipsync = useCallback(async () => {
-    if (!state.selectedVideo || !state.selectedVoice || !state.scriptText) return
+    // ② 缺项明确提示（#1809）：不再静默 return
+    const video = state.selectedVideo
+    const voice = state.selectedVoice
+    const text = state.scriptText.trim()
+    const missing: string[] = []
+    if (!video) missing.push("出镜视频")
+    if (!voice) missing.push("音色")
+    if (!text) missing.push("文案")
+    if (missing.length > 0 || !video || !voice) {
+      message.warning(`请先选择${missing.join("、")}`)
+      return
+    }
     try {
       const job = await createLipsyncJob({
-        voice_id: state.selectedVoice.voice_id,
+        voice_id: voice.voice_id,
         script_text: state.scriptText,
-        video_asset_id: state.selectedVideo.id,
+        video_asset_id: video.id,
       })
       state.setLipsyncJob(job)
+      message.success("对口型任务已提交，生成中…")
       // 开始轮询
       if (lipsyncTimerRef.current) clearInterval(lipsyncTimerRef.current)
       lipsyncTimerRef.current = setInterval(async () => {
@@ -56,13 +65,20 @@ const AiAvatarPage: React.FC = () => {
           state.setLipsyncJob(updated)
           if (updated.status === "completed" || updated.status === "failed") {
             if (lipsyncTimerRef.current) clearInterval(lipsyncTimerRef.current)
+            if (updated.status === "completed") {
+              message.success("对口型视频生成完成")
+            } else {
+              message.error(updated.error_message || "对口型生成失败")
+            }
           }
         } catch {
-          // 忽略轮询错误
+          // 忽略轮询错误（轮询期间不打扰用户）
         }
       }, 3000)
     } catch (err) {
+      // ② 接口失败弹错误提示，不只 console
       console.error("对口型任务创建失败:", err)
+      message.error(err instanceof Error ? err.message : "对口型任务提交失败，请重试")
     }
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [state.selectedVideo, state.selectedVoice, state.scriptText])
@@ -74,16 +90,13 @@ const AiAvatarPage: React.FC = () => {
     }
   }, [])
 
-  /* ── 加载 B-roll 素材 ── */
-  useEffect(() => {
-    getAssetsByKind("video", { limit: 50 })
-      .then(setBRollAssets)
-      .catch(() => {})
-  }, [])
-
   /* ── 生成视频 ── */
   const handleGenerate = useCallback(async () => {
-    if (!state.lipsyncJob || state.lipsyncJob.status !== "completed") return
+    // ② 前置条件提示（#1809）
+    if (!state.lipsyncJob || state.lipsyncJob.status !== "completed") {
+      message.warning("请先生成对口型视频，待对口型完成后再提交渲染")
+      return
+    }
     state.setIsGenerating(true)
     try {
       await submitRender({
@@ -94,8 +107,10 @@ const AiAvatarPage: React.FC = () => {
         cover_config: state.coverConfig as unknown as Record<string, unknown>,
         resolution: state.resolution,
       })
+      message.success("渲染任务已提交，可在视频管理中查看进度")
     } catch (err) {
       console.error("渲染任务提交失败:", err)
+      message.error(err instanceof Error ? err.message : "渲染任务提交失败，请重试")
     } finally {
       state.setIsGenerating(false)
     }
@@ -241,7 +256,8 @@ const AiAvatarPage: React.FC = () => {
           open={state.showBRollModal}
           onClose={() => state.setShowBRollModal(false)}
           existingSegments={state.bRollSegments}
-          availableAssets={bRollAssets}
+          scriptText={state.scriptText}
+          outputDuration={state.lipsyncJob?.output_duration ?? 0}
           onConfirm={state.addBRollSegment}
           onRemove={state.removeBRollSegment}
         />
@@ -264,8 +280,8 @@ const ScriptSelectModalLazy: React.FC<{
     if (!open) return
     setLoading(true)
     getScripts()
-      .then(setScripts)
-      .catch(() => {})
+      .then((items) => setScripts(Array.isArray(items) ? items : []))
+      .catch(() => setScripts([]))
       .finally(() => setLoading(false))
   }, [open])
 

apps/web/src/pages/ai-avatar/api/aiAvatar.ts

@@ -6,8 +6,12 @@ import type { Script, LipsyncJob, RenderJob, BRollSegment } from "../types"
 
 /* ── 文案库 ── */
 export const getScripts = async (): Promise<Script[]> => {
-  const response = await apiClient.get<Script[]>("/scripts")
-  return response.data
+  const response = await apiClient.get<{ items?: Script[] } | Script[]>("/scripts")
+  // 后端列表返回 { items, total } 分页对象，做兼容解包 + 数组防御（#1809 白屏修复）
+  const data = response.data as unknown
+  if (Array.isArray(data)) return data
+  const items = (data as { items?: Script[] })?.items
+  return Array.isArray(items) ? items : []
 }
 
 export const getScriptById = async (id: string): Promise<Script> => {

apps/web/src/pages/ai-avatar/components/ModalAssetPicker.tsx

@@ -1,13 +1,10 @@
 /**
- * AI数字人 — 素材库弹窗
- * 搜索框 + 类型筛选（全部/视频/图片）+ 4 列竖屏 9:16 缩略图网格 + 底部确认选择
+ * AI数字人 — 出镜视频选择弹窗（#1809 ③）
+ * 交互对齐智能剪辑 Step2：先选素材库（video 库）→ 再选该库内视频。
+ * 搜索框 + 素材库下拉 + 竖屏 9:16 视频缩略图网格 + 底部确认选择。
  */
 import { useEffect, useState } from "react"
-import { ensureDefaultLibrary, getAssetsByKind, type AssetItem } from "@/api/assets"
-import { getOrCreateDefaultProject } from "@/api/projects"
-
-/** 素材类型筛选 */
-type AssetKindFilter = "all" | "video" | "image"
+import { getAssets, getAssetLibraries, type AssetItem, type AssetLibraryItem } from "@/api/assets"
 
 export interface ModalAssetPickerProps {
   open: boolean
@@ -17,86 +14,76 @@ export interface ModalAssetPickerProps {
   selectedId?: string
 }
 
-const KIND_OPTIONS: { value: AssetKindFilter; label: string }[] = [
-  { value: "all", label: "全部" },
-  { value: "video", label: "视频" },
-  { value: "image", label: "图片" },
-]
-
 export function ModalAssetPicker({ open, onClose, onSelect, selectedId }: ModalAssetPickerProps) {
   const [keyword, setKeyword] = useState("")
-  const [kindFilter, setKindFilter] = useState<AssetKindFilter>("video")
+  const [libraries, setLibraries] = useState<AssetLibraryItem[]>([])
+  const [libraryId, setLibraryId] = useState<string>("")
   const [assets, setAssets] = useState<AssetItem[]>([])
   const [pickedId, setPickedId] = useState<string | null>(null)
-  const [loading, setLoading] = useState(false)
+  const [loadingLibs, setLoadingLibs] = useState(false)
+  const [loadingAssets, setLoadingAssets] = useState(false)
   const [error, setError] = useState("")
-  const [ready, setReady] = useState(false)
 
-  /* 弹窗打开：重置筛选 / 关键字，并定位高亮到已选素材 */
+  /* 弹窗打开：重置状态 */
   useEffect(() => {
     if (!open) return
     setKeyword("")
-    setKindFilter("video")
+    setLibraries([])
+    setLibraryId("")
     setAssets([])
     setError("")
     setPickedId(selectedId ?? null)
-    setReady(false)
     // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [open])
 
-  /* 确保默认素材库存在（视频 + 图片，供类型筛选），仅在弹窗打开时执行一次 */
+  /* 第一步：加载视频素材库列表（仅 kind=video，对齐智能剪辑 #1777） */
   useEffect(() => {
     if (!open) return
     let cancelled = false
-    const ensureLibraries = async () => {
-      try {
-        const project = await getOrCreateDefaultProject()
-        await Promise.all([
-          ensureDefaultLibrary({ project_id: project.id, kind: "video" }),
-          ensureDefaultLibrary({ project_id: project.id, kind: "image" }),
-        ])
-        if (!cancelled) setReady(true)
-      } catch {
-        if (!cancelled) setError("素材库初始化失败，请重试")
-      }
-    }
-    ensureLibraries()
+    setLoadingLibs(true)
+    getAssetLibraries("video")
+      .then((libs) => {
+        if (cancelled) return
+        const list = Array.isArray(libs) ? libs : []
+        setLibraries(list)
+        // 默认选中第一个视频库
+        if (list.length > 0) setLibraryId((prev) => prev || list[0].id)
+      })
+      .catch(() => {
+        if (!cancelled) setError("素材库加载失败，请重试")
+      })
+      .finally(() => {
+        if (!cancelled) setLoadingLibs(false)
+      })
     return () => {
       cancelled = true
     }
   }, [open])
 
-  /* 拉取素材：类型 / 关键字变化时防抖重新请求 */
+  /* 第二步：选中库后拉取该库视频素材（关键字防抖） */
   useEffect(() => {
-    if (!open || !ready) return
+    if (!open || !libraryId) return
     let cancelled = false
-    setLoading(true)
+    setLoadingAssets(true)
     const load = async () => {
       try {
-        const kw = keyword.trim() || undefined
-        let items: AssetItem[] = []
-        if (kindFilter === "all") {
-          const [videos, images] = await Promise.all([
-            getAssetsByKind("video", { keyword: kw }),
-            getAssetsByKind("image", { keyword: kw }),
-          ])
-          const seen = new Set<string>()
-          items = [...videos, ...images].filter((a) => {
-            if (seen.has(a.id)) return false
-            seen.add(a.id)
-            return true
-          })
-        } else {
-          items = await getAssetsByKind(kindFilter, { keyword: kw })
-        }
-        if (!cancelled) setAssets(items)
+        // getAssets 返回 { items, total }；拉满一页（数字人口播视频库通常不大）
+        const { items } = await getAssets(libraryId, { page_size: 100 })
+        if (cancelled) return
+        let list = Array.isArray(items) ? items : []
+        // 仅保留视频素材（出镜视频要求）
+        list = list.filter((a) => a.mime_type?.includes("video"))
+        const kw = keyword.trim()
+        if (kw) list = list.filter((a) => a.name?.includes(kw))
+        setAssets(list)
+        setError("")
       } catch {
         if (!cancelled) {
           setError("素材加载失败，请重试")
           setAssets([])
         }
       } finally {
-        if (!cancelled) setLoading(false)
+        if (!cancelled) setLoadingAssets(false)
       }
     }
     const timer = window.setTimeout(load, 300)
@@ -104,7 +91,7 @@ export function ModalAssetPicker({ open, onClose, onSelect, selectedId }: ModalA
       cancelled = true
       window.clearTimeout(timer)
     }
-  }, [open, ready, kindFilter, keyword])
+  }, [open, libraryId, keyword])
 
   if (!open) return null
 
@@ -120,15 +107,33 @@ export function ModalAssetPicker({ open, onClose, onSelect, selectedId }: ModalA
       <div className="aa-modal" onClick={(e) => e.stopPropagation()}>
         {/* 头部 */}
         <div className="aa-modal__header">
-          <span className="aa-modal__title">选择素材</span>
+          <span className="aa-modal__title">选择出镜视频</span>
           <button type="button" className="aa-modal__close" onClick={onClose} aria-label="关闭">
             ×
           </button>
         </div>
 
-        {/* 主体：搜索 + 筛选 + 网格 */}
+        {/* 主体：素材库选择 + 搜索 + 网格 */}
         <div className="aa-modal__body">
+          {/* 第一步：选素材库 */}
           <div className="aa-asset-search">
+            <select
+              className="aa-select"
+              style={{ width: 160, flex: "0 0 auto" }}
+              value={libraryId}
+              onChange={(e) => setLibraryId(e.target.value)}
+              disabled={loadingLibs || libraries.length === 0}
+            >
+              {libraries.length === 0 ? (
+                <option value="">{loadingLibs ? "素材库加载中…" : "暂无视频素材库"}</option>
+              ) : (
+                libraries.map((lib) => (
+                  <option key={lib.id} value={lib.id}>
+                    📁 {lib.name}
+                  </option>
+                ))
+              )}
+            </select>
             <input
               className="aa-input"
               type="text"
@@ -136,21 +141,14 @@ export function ModalAssetPicker({ open, onClose, onSelect, selectedId }: ModalA
               value={keyword}
               onChange={(e) => setKeyword(e.target.value)}
             />
-            <select
-              className="aa-select"
-              style={{ width: 110, flex: "0 0 auto" }}
-              value={kindFilter}
-              onChange={(e) => setKindFilter(e.target.value as AssetKindFilter)}
-            >
-              {KIND_OPTIONS.map((opt) => (
-                <option key={opt.value} value={opt.value}>
-                  {opt.label}
-                </option>
-              ))}
-            </select>
           </div>
 
-          {loading ? (
+          {libraries.length === 0 && !loadingLibs ? (
+            <div className="aa-empty">
+              <div className="aa-empty__icon">📁</div>
+              暂无视频素材库，请先在「素材库」中创建视频库并上传视频
+            </div>
+          ) : loadingAssets ? (
             <div className="aa-empty">
               <div className="aa-empty__icon">⏳</div>
               素材加载中…
@@ -162,8 +160,8 @@ export function ModalAssetPicker({ open, onClose, onSelect, selectedId }: ModalA
             </div>
           ) : assets.length === 0 ? (
             <div className="aa-empty">
-              <div className="aa-empty__icon">📁</div>
-              暂无素材
+              <div className="aa-empty__icon">🎬</div>
+              该素材库暂无视频素材
             </div>
           ) : (
             <div className="aa-asset-grid">

apps/web/src/pages/ai-avatar/components/ModalBRollEditor.tsx

@@ -1,23 +1,27 @@
 /**
- * AI数字人 — B-roll 画面插入编辑器弹窗
+ * AI数字人 — B-roll 画面插入编辑器弹窗（#1809 ④⑤⑥）
  *
  * 布局：
- * - 左侧：可用素材网格（已被其他 segment 使用的素材标灰 + "已选择" 遮罩，
- *   pointer-events: none 防止重复选择同一段素材）
- * - 右侧：插入设置（文案段落索引 / 全屏 or 画中画 / 画中画四角位置 + 大小 / 起止时间）
- * - 底部：已配置的画面插入列表（可删除）+ 上传新素材入口
+ * - 左侧：先选素材库（video 库）→ 再选该库视频素材（已被其他 segment 使用的素材
+ *   标灰 + "已选择" 遮罩，pointer-events:none 防重复选择）
+ * - 右侧：文案句子列表（点选对应段落，替代原数字索引框）/ 全屏 or 画中画 / 四角位置+大小
+ *   （开始/结束时间已删除，按句子字数占比 × 口播总时长自动估算）
+ * - 底部：已配置的画面插入列表（可删除）
  */
-import React, { useMemo, useState } from "react"
-import type { AssetItem } from "@/api/assets"
+import React, { useEffect, useMemo, useState } from "react"
+import { getAssets, getAssetLibraries, type AssetItem, type AssetLibraryItem } from "@/api/assets"
 import type { BRollSegment, BRollInsertMode, PipPosition } from "../types"
+import { splitScriptIntoSentences, type ScriptSentence } from "../utils/sentences"
 
 interface ModalBRollEditorProps {
   open: boolean
   onClose: () => void
   /** 当前已有的 B-roll segments（用于标灰已选素材） */
   existingSegments: BRollSegment[]
-  /** 所有可用素材 */
-  availableAssets: AssetItem[]
+  /** 当前文案全文（用于分句） */
+  scriptText: string
+  /** 对口型成片总时长（秒），用于时间自动估算 */
+  outputDuration: number
   onConfirm: (segment: BRollSegment) => void
   onRemove: (id: string) => void
 }
@@ -38,18 +42,31 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
   open,
   onClose,
   existingSegments,
-  availableAssets,
+  scriptText,
+  outputDuration,
   onConfirm,
   onRemove,
 }) => {
+  /* ── 素材库（④ 先选库再选素材） ── */
+  const [libraries, setLibraries] = useState<AssetLibraryItem[]>([])
+  const [libraryId, setLibraryId] = useState<string>("")
+  const [availableAssets, setAvailableAssets] = useState<AssetItem[]>([])
+  const [loadingLibs, setLoadingLibs] = useState(false)
+  const [loadingAssets, setLoadingAssets] = useState(false)
+  const [assetError, setAssetError] = useState("")
+
   /* ── 右侧设置本地状态 ── */
   const [selectedAsset, setSelectedAsset] = useState<AssetItem | null>(null)
-  const [scriptSegmentIndex, setScriptSegmentIndex] = useState(0)
+  const [selectedSentence, setSelectedSentence] = useState<ScriptSentence | null>(null)
   const [mode, setMode] = useState<BRollInsertMode>("fullscreen")
   const [pipPosition, setPipPosition] = useState<PipPosition>("top-right")
   const [pipScale, setPipScale] = useState(0.3)
-  const [startTime, setStartTime] = useState(0)
-  const [endTime, setEndTime] = useState(3)
+
+  /** 文案分句（⑤） */
+  const sentences = useMemo(
+    () => splitScriptIntoSentences(scriptText, outputDuration),
+    [scriptText, outputDuration],
+  )
 
   /** 已被现有 segments 占用的素材 id 集合（标灰、禁止重复选择） */
   const usedAssetIds = useMemo(
@@ -57,25 +74,83 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
     [existingSegments],
   )
 
+  /* 弹窗打开：重置选择 + 加载视频库列表 */
+  useEffect(() => {
+    if (!open) return
+    setSelectedAsset(null)
+    setSelectedSentence(null)
+    setMode("fullscreen")
+    setPipPosition("top-right")
+    setPipScale(0.3)
+    setLibraries([])
+    setLibraryId("")
+    setAvailableAssets([])
+    setAssetError("")
+    setLoadingLibs(true)
+    let cancelled = false
+    getAssetLibraries("video")
+      .then((libs) => {
+        if (cancelled) return
+        const list = Array.isArray(libs) ? libs : []
+        setLibraries(list)
+        if (list.length > 0) setLibraryId(list[0].id)
+      })
+      .catch(() => {
+        if (!cancelled) setAssetError("素材库加载失败，请重试")
+      })
+      .finally(() => {
+        if (!cancelled) setLoadingLibs(false)
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [open])
+
+  /* 选中库后拉取该库视频素材 */
+  useEffect(() => {
+    if (!open || !libraryId) return
+    let cancelled = false
+    setLoadingAssets(true)
+    getAssets(libraryId, { page_size: 100 })
+      .then(({ items }) => {
+        if (cancelled) return
+        const list = (Array.isArray(items) ? items : []).filter((a) =>
+          a.mime_type?.includes("video"),
+        )
+        setAvailableAssets(list)
+        setAssetError("")
+      })
+      .catch(() => {
+        if (!cancelled) {
+          setAssetError("素材加载失败，请重试")
+          setAvailableAssets([])
+        }
+      })
+      .finally(() => {
+        if (!cancelled) setLoadingAssets(false)
+      })
+    return () => {
+      cancelled = true
+    }
+  }, [open, libraryId])
+
   if (!open) return null
 
   /** 选择素材（已选素材因 pointer-events:none 不会触发） */
   const handleSelectAsset = (asset: AssetItem) => {
     if (usedAssetIds.has(asset.id)) return
     setSelectedAsset(asset)
-    // 默认起止时间：素材时长的前 3 秒（或整段）
-    const dur = asset.duration ?? 3
-    setEndTime(Math.min(3, dur))
   }
 
-  /** 确认添加一段 B-roll */
+  /** 确认添加一段 B-roll（⑥ 时间取所选句子的估算起止） */
   const handleConfirm = () => {
-    if (!selectedAsset) return
-    if (endTime <= startTime) return
+    if (!selectedAsset || !selectedSentence) return
+    const startTime = selectedSentence.startTime
+    const endTime = Math.max(selectedSentence.endTime, startTime + 0.5)
     const segment: BRollSegment = {
       id: crypto.randomUUID(),
       asset: selectedAsset,
-      script_segment_index: scriptSegmentIndex,
+      script_segment_index: selectedSentence.index,
       start_time: startTime,
       end_time: endTime,
       mode,
@@ -83,15 +158,16 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
       pip_scale: mode === "pip" ? pipScale : 0.3,
     }
     onConfirm(segment)
-    // 重置选择，保留设置便于连续添加
+    // 重置素材/句子选择，保留模式设置便于连续添加
     setSelectedAsset(null)
+    setSelectedSentence(null)
   }
 
-  const canConfirm = selectedAsset !== null && endTime > startTime
+  const canConfirm = selectedAsset !== null && selectedSentence !== null
 
   return (
     <div className="aa-modal-overlay" onClick={onClose}>
-      <div className="aa-modal" onClick={(e) => e.stopPropagation()}>
+      <div className="aa-modal aa-modal--wide" onClick={(e) => e.stopPropagation()}>
         {/* 头部 */}
         <div className="aa-modal__header">
           <span className="aa-modal__title">🎞️ 画面插入（B-roll）</span>
@@ -103,22 +179,25 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
         {/* 主体：左素材 + 右设置 */}
         <div className="aa-modal__body">
           <div className="aa-broll-modal-body">
-            {/* 左侧：素材网格 */}
+            {/* 左侧：选库 + 素材网格 */}
             <div className="aa-broll-left">
-              <div
-                style={{
-                  display: "flex",
-                  alignItems: "center",
-                  justifyContent: "space-between",
-                  marginBottom: 10,
-                }}
-              >
-                <span style={{ fontSize: 13, fontWeight: 600, color: "#1a1a2e" }}>
-                  选择素材（{availableAssets.length}）
-                </span>
-                <button type="button" className="aa-btn aa-btn--ghost aa-btn-sm">
-                  ⬆️ 上传新素材
-                </button>
+              <div className="aa-broll-lib-row">
+                <select
+                  className="aa-select"
+                  value={libraryId}
+                  onChange={(e) => setLibraryId(e.target.value)}
+                  disabled={loadingLibs || libraries.length === 0}
+                >
+                  {libraries.length === 0 ? (
+                    <option value="">{loadingLibs ? "素材库加载中…" : "暂无视频素材库"}</option>
+                  ) : (
+                    libraries.map((lib) => (
+                      <option key={lib.id} value={lib.id}>
+                        📁 {lib.name}
+                      </option>
+                    ))
+                  )}
+                </select>
               </div>
               <div className="aa-broll-asset-grid">
                 {availableAssets.map((asset) => {
@@ -141,45 +220,60 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
                       {asset.thumbnail_url ? (
                         <img src={asset.thumbnail_url} alt={asset.name} />
                       ) : (
-                        <div
-                          style={{
-                            width: "100%",
-                            height: "100%",
-                            display: "flex",
-                            alignItems: "center",
-                            justifyContent: "center",
-                            fontSize: 18,
-                          }}
-                        >
-                          🎬
-                        </div>
+                        <div className="aa-broll-asset-placeholder">🎬</div>
                       )}
                       <span className="aa-asset-card__name">{asset.name}</span>
                     </div>
                   )
                 })}
-                {availableAssets.length === 0 && (
+                {loadingAssets ? (
+                  <div className="aa-empty" style={{ gridColumn: "1 / -1" }}>
+                    <div className="aa-empty__icon">⏳</div>
+                    素材加载中…
+                  </div>
+                ) : availableAssets.length === 0 ? (
                   <div className="aa-empty" style={{ gridColumn: "1 / -1" }}>
                     <div className="aa-empty__icon">🎬</div>
-                    暂无可用素材，请先上传视频素材
+                    {assetError || "该素材库暂无视频素材"}
                   </div>
-                )}
+                ) : null}
               </div>
             </div>
 
             {/* 右侧：插入设置 */}
             <div className="aa-broll-right">
               <div className="aa-broll-settings">
-                {/* 文案段落索引 */}
+                {/* ⑤ 文案句子列表（替代段落索引数字框） */}
                 <div className="aa-form-field">
-                  <label className="aa-label">文案段落索引</label>
-                  <input
-                    className="aa-input"
-                    type="number"
-                    min={0}
-                    value={scriptSegmentIndex}
-                    onChange={(e) => setScriptSegmentIndex(Math.max(0, Number(e.target.value)))}
-                  />
+                  <label className="aa-label">对应文案句子（点选）</label>
+                  {sentences.length === 0 ? (
+                    <div className="aa-sentence-empty">
+                      请先在「文案 & 对口型」面板填写或选择文案
+                    </div>
+                  ) : (
+                    <div className="aa-sentence-list">
+                      {sentences.map((sent) => {
+                        const active = selectedSentence?.index === sent.index
+                        return (
+                          <button
+                            key={sent.index}
+                            type="button"
+                            className={`aa-sentence-item${active ? " active" : ""}`}
+                            onClick={() => setSelectedSentence(sent)}
+                            title={sent.text}
+                          >
+                            <span className="aa-sentence-item__idx">{sent.index + 1}</span>
+                            <span className="aa-sentence-item__text">{sent.text}</span>
+                            {outputDuration > 0 && (
+                              <span className="aa-sentence-item__time">
+                                {sent.startTime.toFixed(1)}-{sent.endTime.toFixed(1)}s
+                              </span>
+                            )}
+                          </button>
+                        )
+                      })}
+                    </div>
+                  )}
                 </div>
 
                 {/* 插入模式 */}
@@ -224,10 +318,7 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
                       </div>
                     </div>
                     <div className="aa-form-field">
-                      <div
-                        className="aa-field-label-row"
-                        style={{ display: "flex", justifyContent: "space-between" }}
-                      >
+                      <div className="aa-field-label-row">
                         <label className="aa-label">画中画大小</label>
                         <span style={{ fontSize: 12, color: "#8c8ca1" }}>
                           {Math.round(pipScale * 100)}%
@@ -246,41 +337,26 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
                   </>
                 )}
 
-                {/* 起止时间 */}
-                <div className="aa-form-field">
-                  <label className="aa-label">开始时间（秒）</label>
-                  <input
-                    className="aa-input"
-                    type="number"
-                    min={0}
-                    step={0.1}
-                    value={startTime}
-                    onChange={(e) => setStartTime(Math.max(0, Number(e.target.value)))}
-                  />
-                </div>
-                <div className="aa-form-field">
-                  <label className="aa-label">结束时间（秒）</label>
-                  <input
-                    className="aa-input"
-                    type="number"
-                    min={0}
-                    step={0.1}
-                    value={endTime}
-                    onChange={(e) => setEndTime(Math.max(0, Number(e.target.value)))}
-                  />
-                </div>
-
-                {/* 当前选中素材提示 */}
-                <div
-                  style={{
-                    fontSize: 12,
-                    color: selectedAsset ? "#059669" : "#8c8ca1",
-                    background: "#f8f8fc",
-                    borderRadius: 6,
-                    padding: "6px 8px",
-                  }}
-                >
-                  {selectedAsset ? `已选素材：${selectedAsset.name}` : "请从左侧选择一段素材"}
+                {/* 当前选择提示（⑥ 自动估算时间在这里展示） */}
+                <div className="aa-broll-hint">
+                  {selectedAsset && selectedSentence ? (
+                    <>
+                      <div>已选素材：{selectedAsset.name}</div>
+                      <div>
+                        对应第 {selectedSentence.index + 1} 句 · 时间段{" "}
+                        {selectedSentence.startTime.toFixed(1)}s -{" "}
+                        {Math.max(
+                          selectedSentence.endTime,
+                          selectedSentence.startTime + 0.5,
+                        ).toFixed(1)}
+                        s （按字数自动估算）
+                      </div>
+                    </>
+                  ) : (
+                    <div style={{ color: "#8c8ca1" }}>
+                      {!selectedAsset ? "请从左侧选择一段素材" : "请在上方点选对应的文案句子"}
+                    </div>
+                  )}
                 </div>
               </div>
             </div>
@@ -304,7 +380,7 @@ const ModalBRollEditor: React.FC<ModalBRollEditorProps> = ({
                   <div className="aa-broll-item__info">
                     <div style={{ fontWeight: 500, color: "#1a1a2e" }}>{seg.asset.name}</div>
                     <div style={{ color: "#8c8ca1", fontSize: 11 }}>
-                      段落 {seg.script_segment_index} · {MODE_LABEL[seg.mode]}
+                      第 {seg.script_segment_index + 1} 句 · {MODE_LABEL[seg.mode]}
                       {seg.mode === "pip" ? ` · ${seg.pip_position}` : ""} ·{" "}
                       {seg.start_time.toFixed(1)}s - {seg.end_time.toFixed(1)}s
                     </div>

apps/web/src/pages/ai-avatar/components/PanelVoiceSelector.tsx

@@ -52,7 +52,7 @@ export function PanelVoiceSelector({
       setError(null)
       try {
         const res = await fetchVoices({ type: voiceSource })
-        if (!cancelled) setVoices(res.items || [])
+        if (!cancelled) setVoices(Array.isArray(res?.items) ? res.items : [])
       } catch (err) {
         if (!cancelled) setError(err instanceof Error ? err.message : "音色加载失败")
       } finally {

apps/web/src/pages/ai-avatar/types.ts

@@ -44,6 +44,8 @@ export interface LipsyncJob {
   status: LipsyncStatus
   progress: number
   output_video_url: string | null
+  /** 对口型成片总时长（秒），后端返回；用于 B-roll 时间自动估算（#1809 ⑥） */
+  output_duration?: number
   error_message: string | null
   created_at: string
 }

apps/web/src/pages/ai-avatar/utils/sentences.ts

@@ -0,0 +1,62 @@
+/**
+ * AI数字人 — 文案分句 & B-roll 时间自动估算（#1809 ⑤⑥）
+ */
+
+export interface ScriptSentence {
+  /** 句子序号（从 0 开始，对应提交给后端的 script_segment_index） */
+  index: number
+  /** 句子文本（去掉首尾空白） */
+  text: string
+  /** 句子字数（按中文/字符计，去除空白） */
+  charCount: number
+  /** 累计起始字数（用于时间估算） */
+  startChar: number
+  /** 估算的对口型视频内起始时间（秒） */
+  startTime: number
+  /** 估算的对口型视频内结束时间（秒） */
+  endTime: number
+}
+
+/**
+ * 按句号/问号/感叹号/分号/换行分句（兼容中英文标点）。
+ * 空文案返回空数组。时间按「该句字数 ÷ 全文总字数 × 口播总时长」线性估算。
+ */
+export function splitScriptIntoSentences(
+  scriptText: string,
+  outputDuration: number,
+): ScriptSentence[] {
+  const text = (scriptText || "").trim()
+  if (!text) return []
+
+  const rawParts = text
+    .split(/[。！？!?；;\n\r]+/)
+    .map((part) => part.trim())
+    .filter((part) => part.length > 0)
+
+  const totalChars = rawParts.reduce((sum, part) => sum + part.replace(/\s/g, "").length, 0)
+  const duration = outputDuration > 0 ? outputDuration : 0
+
+  const sentences: ScriptSentence[] = []
+  let accChar = 0
+  rawParts.forEach((part, i) => {
+    const charCount = part.replace(/\s/g, "").length
+    const startTime = duration > 0 && totalChars > 0 ? (accChar / totalChars) * duration : 0
+    const endTime =
+      duration > 0 && totalChars > 0 ? ((accChar + charCount) / totalChars) * duration : 0
+    sentences.push({
+      index: i,
+      text: part,
+      charCount,
+      startChar: accChar,
+      startTime: round1(startTime),
+      endTime: round1(endTime),
+    })
+    accChar += charCount
+  })
+
+  return sentences
+}
+
+function round1(n: number): number {
+  return Math.round(n * 10) / 10
+}

apps/web/src/pages/generate/components/title/TitleStylePanel.css

@@ -0,0 +1,192 @@
+/* ============================================================
+   TitleStylePanel 标题样式面板 — 独立共用样式（#1809 ⑦）
+
+   从 generate.css 抽取的标题样式区块，供「智能剪辑」与「AI数字人」
+   两个页面共用。AI数字人页面不引入 generate.css，直接由
+   TitleStylePanel.tsx import 本文件，保证 24 个 T 预设格子的网格布局、
+   配色描边、选中态与智能剪辑页面完全一致。
+
+   注意：本文件规则与 generate.css 中同名规则一一对应、取值相同；
+   智能剪辑页面两处同时存在时同优先级同值，不改变其原有呈现。
+   ============================================================ */
+
+/* ── 区块容器 ── */
+.xx-title-style-section {
+  margin-top: 22px;
+  padding-top: 20px;
+  border-top: 1px solid var(--border-light);
+}
+
+.xx-section-subtitle {
+  font-size: 14px;
+  font-weight: 600;
+  color: var(--text-primary);
+  margin: 0 0 16px;
+}
+
+.xx-title-style-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 14px;
+  margin-bottom: 14px;
+}
+
+.xx-half-field {
+  margin-bottom: 0;
+}
+
+.xx-field-label-row {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  margin-bottom: 8px;
+}
+
+.xx-field-label-row label {
+  margin-bottom: 0;
+}
+
+.xx-field-value {
+  font-size: 13px;
+  font-weight: 600;
+  color: var(--primary-color);
+}
+
+/* ── 共用表单字段（位置/字体下拉） ── */
+.xx-title-style-section .xx-form-field {
+  margin-bottom: 14px;
+}
+
+.xx-title-style-section .xx-form-field:last-child {
+  margin-bottom: 0;
+}
+
+.xx-title-style-section .xx-form-field label {
+  display: block;
+  font-weight: 600;
+  margin-bottom: 8px;
+  font-size: 13px;
+  color: var(--text-primary);
+}
+
+.xx-title-style-section .xx-form-field select,
+.xx-title-style-section .xx-form-field input {
+  width: 100%;
+  height: 44px;
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  background: var(--bg-primary);
+  padding: 0 14px;
+  font-size: 14px;
+  outline: 0;
+  transition: 0.15s ease;
+  color: var(--text-primary);
+}
+
+.xx-title-style-section .xx-form-field select:focus,
+.xx-title-style-section .xx-form-field input:focus {
+  border-color: var(--primary-color);
+  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
+}
+
+/* ── 字号滑块 ── */
+.xx-slider {
+  width: 100%;
+  height: 6px;
+  -webkit-appearance: none;
+  appearance: none;
+  background: var(--border-color);
+  border-radius: 3px;
+  outline: none;
+  cursor: pointer;
+}
+
+.xx-slider::-webkit-slider-thumb {
+  -webkit-appearance: none;
+  appearance: none;
+  width: 18px;
+  height: 18px;
+  background: var(--primary-color);
+  border-radius: 50%;
+  cursor: pointer;
+  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
+}
+
+.xx-slider::-moz-range-thumb {
+  width: 18px;
+  height: 18px;
+  background: var(--primary-color);
+  border-radius: 50%;
+  cursor: pointer;
+  border: none;
+  box-shadow: 0 2px 6px rgba(79, 70, 229, 0.3);
+}
+
+/* ── 标题预设卡片网格（24 个 T 格子） ── */
+.xx-title-presets-grid {
+  display: grid;
+  grid-template-columns: repeat(6, 52px);
+  gap: 1px;
+}
+
+.xx-title-preset-card {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  width: 52px;
+  height: 52px;
+  padding: 0;
+  background: #404040;
+  border: 2px solid transparent;
+  border-radius: 8px;
+  cursor: pointer;
+  transition: all 0.15s;
+}
+
+.xx-title-preset-card:hover {
+  border-color: #666;
+  background: #4d4d4d;
+}
+
+.xx-title-preset-card.active {
+  border-color: #409eff;
+  background: #4d4d4d;
+}
+
+.xx-title-preset-preview-text {
+  font-size: 32px;
+  line-height: 1;
+  user-select: none;
+}
+
+/* ── 样式按钮组（加粗/斜体/描边/阴影） ── */
+.xx-style-btns {
+  display: flex;
+  gap: 8px;
+}
+
+.xx-style-btn {
+  width: 40px;
+  height: 40px;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  border: 1px solid var(--border-color);
+  border-radius: var(--radius-sm);
+  background: var(--bg-primary);
+  cursor: pointer;
+  font-size: 15px;
+  color: var(--text-secondary);
+  transition: all 0.15s;
+}
+
+.xx-style-btn:hover {
+  border-color: var(--primary-300);
+  color: var(--primary-color);
+}
+
+.xx-style-btn.active {
+  background: var(--primary-color);
+  border-color: var(--primary-color);
+  color: #fff;
+}

apps/web/src/pages/generate/components/title/TitleStylePanel.tsx

@@ -5,6 +5,9 @@
 import React from "react"
 import type { TitleSettings } from "../../types"
 import TitlePresetsGrid from "./TitlePresetsGrid"
+// 标题样式面板共用样式（#1809 ⑦）：智能剪辑与 AI数字人复用同一组件，
+// 由组件自带样式，避免 AI数字人页面重复引入整个 generate.css
+import "./TitleStylePanel.css"
 
 interface PositionOption {
   value: string