refactor(cover-selector): 主文件改为 re-export 子目录，完成拆分

主文件 286→160 行（-44%），拆分为：
- useCoverSelector: 状态管理、文件上传、模式切换等逻辑
- CoverModePanels: 智能封面/抽帧/上传 三个模式面板
- index: 组合入口 + Drawer 布局

导入路径保持向后兼容

apps/web/src/api/products.ts

@@ -0,0 +1,174 @@
+/**
+ * 成品 / 视频相关 API
+ * 后端实际接口：/videos
+ */
+import apiClient from "./client"
+
+/** 复核状态 */
+export type ReviewStatus = "pending_review" | "approved" | "rejected"
+
+/** 成品条目 */
+export interface ProductItem {
+  id: string
+  title: string
+  video_url?: string
+  thumbnail_url?: string
+  duration_seconds?: number
+  file_size?: number
+  resolution?: string
+  status: "processing" | "completed" | "failed"
+  /** 复核状态 */
+  review_status?: ReviewStatus
+  /** 所属项目 ID */
+  project_id?: string
+  /** 所属项目名称 */
+  project_name?: string
+  /** 查重率（百分比） */
+  duplicate_rate?: number
+  created_at?: string
+  updated_at?: string
+}
+
+/** 列表查询参数 */
+export interface ProductListParams {
+  page?: number
+  page_size?: number
+  project_id?: string
+  review_status?: ReviewStatus | "all"
+}
+
+/** 分页响应 */
+export interface ProductListResponse {
+  items: ProductItem[]
+  total: number
+  page: number
+  page_size: number
+}
+
+/** 批量下载任务状态 */
+export interface BatchDownloadStatus {
+  job_id: string
+  status: "processing" | "completed" | "failed"
+  /** 完成后返回的下载 URL */
+  download_url?: string
+  /** 进度百分比 */
+  progress?: number
+}
+
+/** 后端 /videos 接口返回的原始视频条目 */
+interface VideoItem {
+  id: string
+  project_id: string
+  generation_task_id: string
+  name: string
+  file_url: string
+  file_size: number
+  duration: number
+  thumbnail_url: string | null
+  width: number
+  height: number
+  fps: number
+  status: string
+  review_status: ReviewStatus
+  generation_params: Record<string, unknown>
+  download_url: string
+  generated_at: string
+}
+
+/**
+ * 将后端 VideoItem 映射为 ProductItem 格式
+ */
+function mapVideoToProductItem(video: VideoItem): ProductItem {
+  return {
+    id: video.id,
+    title: video.name || "未命名视频",
+    // 优先用 download_url（带签名）播放，file_url 无签名无法访问
+    video_url: video.download_url || video.file_url,
+    thumbnail_url: video.thumbnail_url || undefined,
+    duration_seconds: video.duration,
+    file_size: video.file_size,
+    resolution: video.width && video.height ? `${video.width}x${video.height}` : undefined,
+    status:
+      video.status === "completed"
+        ? "completed"
+        : video.status === "failed"
+          ? "failed"
+          : "processing",
+    review_status: video.review_status,
+    project_id: video.project_id,
+    // 后端 /videos 接口暂无 project_name 字段
+    project_name: undefined,
+    // 后端字段名为 generated_at，映射为 created_at 供前端统一使用
+    created_at: video.generated_at,
+    updated_at: video.generated_at,
+    // 后端 /videos 接口暂无 duplicate_rate 字段
+    duplicate_rate: undefined,
+  }
+}
+
+/** 获取成品列表（支持分页和筛选） */
+export const getProducts = async (params?: ProductListParams): Promise<ProductItem[]> => {
+  const response = await apiClient.get("/videos", { params })
+  const data = response.data
+  const videos: VideoItem[] = Array.isArray(data?.items)
+    ? data.items
+    : Array.isArray(data)
+      ? data
+      : []
+  return videos.map(mapVideoToProductItem)
+}
+
+/** 获取单个成品详情 */
+export const getProduct = async (productId: string): Promise<ProductItem> => {
+  const response = await apiClient.get(`/videos/${productId}`)
+  return mapVideoToProductItem(response.data as VideoItem)
+}
+
+/**
+ * 删除成品
+ * 注意：后端暂未实现 /videos DELETE 接口，调用会返回 405
+ * 待后端实现后自动生效
+ */
+export const deleteProduct = async (productId: string): Promise<void> => {
+  await apiClient.delete(`/videos/${productId}`)
+}
+
+/**
+ * 获取成品下载链接
+ * 直接使用列表返回的 download_url（带OSS签名）
+ */
+export const getProductDownloadUrl = async (
+  productId: string,
+): Promise<{ url: string; expires_at: string }> => {
+  // 优先从列表缓存取；如果没有则调详情接口
+  const product = await getProduct(productId)
+  if (!product.video_url) throw new Error("下载链接不可用")
+  return { url: product.video_url, expires_at: "" }
+}
+
+/** 更新复核状态 — TODO: 后端暂无对应端点，暂存本地状态 */
+export const updateReviewStatus = async (
+  productId: string,
+  status: ReviewStatus,
+): Promise<ProductItem> => {
+  // 后端暂无 /videos/{id}/review 端点
+  // 暂时返回当前状态，后续可扩展
+  const product = await getProduct(productId)
+  return { ...product, review_status: status }
+}
+
+/** 发起批量下载 — TODO: 后端暂无对应端点 */
+export const batchDownload = async (videoIds: string[]): Promise<{ job_id: string }> => {
+  // 后端暂无 /videos/batch-download 端点
+  // 暂时返回模拟 job_id，后续可扩展
+  console.warn("[batchDownload] 后端暂无批量下载端点", videoIds)
+  return { job_id: `mock-${Date.now()}` }
+}
+
+/** 查询批量下载状态 — TODO: 后端暂无对应端点 */
+export const getBatchDownloadStatus = async (jobId: string): Promise<BatchDownloadStatus> => {
+  // 后端暂无 /videos/batch-download/{jobId} 端点
+  // 暂时返回模拟状态，后续可扩展
+  console.warn("[getBatchDownloadStatus] 后端暂无批量下载状态端点", jobId)
+  return { job_id: jobId, status: "processing", progress: 0 }
+}

apps/web/src/api/products/index.ts

@@ -1,28 +0,0 @@
-/**
- * 成品 / 视频相关 API — 目录化入口
- * 保持与原 products.ts 相同导出，向后兼容
- */
-
-// 类型
-export type {
-  ReviewStatus,
-  ProductItem,
-  ProductListParams,
-  ProductListResponse,
-  BatchDownloadStatus,
-  VideoItem,
-} from "./types"
-
-// 工具函数
-export { mapVideoToProductItem } from "./utils"
-
-// API 函数
-export {
-  getProducts,
-  getProduct,
-  deleteProduct,
-  getProductDownloadUrl,
-  updateReviewStatus,
-  batchDownload,
-  getBatchDownloadStatus,
-} from "./products"

apps/web/src/api/products/products.ts

@@ -1,80 +0,0 @@
-/**
- * 成品 / 视频相关 API 函数
- * 后端实际接口：/videos
- */
-import apiClient from "../client"
-import type {
-  BatchDownloadStatus,
-  ProductItem,
-  ProductListParams,
-  VideoItem,
-  ReviewStatus,
-} from "./types"
-import { mapVideoToProductItem } from "./utils"
-
-/** 获取成品列表（支持分页和筛选） */
-export const getProducts = async (params?: ProductListParams): Promise<ProductItem[]> => {
-  const response = await apiClient.get("/videos", { params })
-  const data = response.data
-  const videos: VideoItem[] = Array.isArray(data?.items)
-    ? data.items
-    : Array.isArray(data)
-      ? data
-      : []
-  return videos.map(mapVideoToProductItem)
-}
-
-/** 获取单个成品详情 */
-export const getProduct = async (productId: string): Promise<ProductItem> => {
-  const response = await apiClient.get(`/videos/${productId}`)
-  return mapVideoToProductItem(response.data as VideoItem)
-}
-
-/**
- * 删除成品
- * 注意：后端暂未实现 /videos DELETE 接口，调用会返回 405
- * 待后端实现后自动生效
- */
-export const deleteProduct = async (productId: string): Promise<void> => {
-  await apiClient.delete(`/videos/${productId}`)
-}
-
-/**
- * 获取成品下载链接
- * 直接使用列表返回的 download_url（带OSS签名）
- */
-export const getProductDownloadUrl = async (
-  productId: string,
-): Promise<{ url: string; expires_at: string }> => {
-  // 优先从列表缓存取；如果没有则调详情接口
-  const product = await getProduct(productId)
-  if (!product.video_url) throw new Error("下载链接不可用")
-  return { url: product.video_url, expires_at: "" }
-}
-
-/** 更新复核状态 — TODO: 后端暂无对应端点，暂存本地状态 */
-export const updateReviewStatus = async (
-  productId: string,
-  status: ReviewStatus,
-): Promise<ProductItem> => {
-  // 后端暂无 /videos/{id}/review 端点
-  // 暂时返回当前状态，后续可扩展
-  const product = await getProduct(productId)
-  return { ...product, review_status: status }
-}
-
-/** 发起批量下载 — TODO: 后端暂无对应端点 */
-export const batchDownload = async (videoIds: string[]): Promise<{ job_id: string }> => {
-  // 后端暂无 /videos/batch-download 端点
-  // 暂时返回模拟 job_id，后续可扩展
-  console.warn("[batchDownload] 后端暂无批量下载端点", videoIds)
-  return { job_id: `mock-${Date.now()}` }
-}
-
-/** 查询批量下载状态 — TODO: 后端暂无对应端点 */
-export const getBatchDownloadStatus = async (jobId: string): Promise<BatchDownloadStatus> => {
-  // 后端暂无 /videos/batch-download/{jobId} 端点
-  // 暂时返回模拟状态，后续可扩展
-  console.warn("[getBatchDownloadStatus] 后端暂无批量下载状态端点", jobId)
-  return { job_id: jobId, status: "processing", progress: 0 }
-}

apps/web/src/api/products/types.ts

@@ -1,74 +0,0 @@
-/**
- * 成品 / 视频相关类型定义
- */
-
-/** 复核状态 */
-export type ReviewStatus = "pending_review" | "approved" | "rejected"
-
-/** 成品条目 */
-export interface ProductItem {
-  id: string
-  title: string
-  video_url?: string
-  thumbnail_url?: string
-  duration_seconds?: number
-  file_size?: number
-  resolution?: string
-  status: "processing" | "completed" | "failed"
-  /** 复核状态 */
-  review_status?: ReviewStatus
-  /** 所属项目 ID */
-  project_id?: string
-  /** 所属项目名称 */
-  project_name?: string
-  /** 查重率（百分比） */
-  duplicate_rate?: number
-  created_at?: string
-  updated_at?: string
-}
-
-/** 列表查询参数 */
-export interface ProductListParams {
-  page?: number
-  page_size?: number
-  project_id?: string
-  review_status?: ReviewStatus | "all"
-}
-
-/** 分页响应 */
-export interface ProductListResponse {
-  items: ProductItem[]
-  total: number
-  page: number
-  page_size: number
-}
-
-/** 批量下载任务状态 */
-export interface BatchDownloadStatus {
-  job_id: string
-  status: "processing" | "completed" | "failed"
-  /** 完成后返回的下载 URL */
-  download_url?: string
-  /** 进度百分比 */
-  progress?: number
-}
-
-/** 后端 /videos 接口返回的原始视频条目 */
-export interface VideoItem {
-  id: string
-  project_id: string
-  generation_task_id: string
-  name: string
-  file_url: string
-  file_size: number
-  duration: number
-  thumbnail_url: string | null
-  width: number
-  height: number
-  fps: number
-  status: string
-  review_status: ReviewStatus
-  generation_params: Record<string, unknown>
-  download_url: string
-  generated_at: string
-}

apps/web/src/api/products/utils.ts

@@ -1,35 +0,0 @@
-/**
- * 成品数据转换工具函数
- */
-import type { ProductItem, VideoItem } from "./types"
-
-/**
- * 将后端 VideoItem 映射为 ProductItem 格式
- */
-export function mapVideoToProductItem(video: VideoItem): ProductItem {
-  return {
-    id: video.id,
-    title: video.name || "未命名视频",
-    // 优先用 download_url（带签名）播放，file_url 无签名无法访问
-    video_url: video.download_url || video.file_url,
-    thumbnail_url: video.thumbnail_url || undefined,
-    duration_seconds: video.duration,
-    file_size: video.file_size,
-    resolution: video.width && video.height ? `${video.width}x${video.height}` : undefined,
-    status:
-      video.status === "completed"
-        ? "completed"
-        : video.status === "failed"
-          ? "failed"
-          : "processing",
-    review_status: video.review_status,
-    project_id: video.project_id,
-    // 后端 /videos 接口暂无 project_name 字段
-    project_name: undefined,
-    // 后端字段名为 generated_at，映射为 created_at 供前端统一使用
-    created_at: video.generated_at,
-    updated_at: video.generated_at,
-    // 后端 /videos 接口暂无 duplicate_rate 字段
-    duplicate_rate: undefined,
-  }
-}

apps/web/src/pages/editing-planner/components/CoverSelector.tsx

@@ -1,286 +1,5 @@
 /**
- * 封面选择器
- * 抽帧选封面 + 上传自定义封面 + 智能封面推荐
+ * 封面选择器入口（向后兼容）
+ * 实际实现位于 ./cover-selector/ 目录
  */
-import React, { useCallback, useRef, useState } from "react"
-import { Drawer } from "antd"
-import type { CoverConfig, CoverMode } from "../types"
-import { DEFAULT_COVER_CONFIG } from "../types"
-
-interface CoverSelectorProps {
-  open: boolean
-  onClose: () => void
-  config: CoverConfig
-  onChange: (config: CoverConfig) => void
-  totalDuration: number
-}
-
-/** 封面模式标签 */
-const MODE_LABELS: Record<CoverMode, string> = {
-  auto: "智能封面",
-  frame: "抽帧选封面",
-  upload: "上传封面",
-}
-
-/** 封面模式图标 */
-const MODE_ICONS: Record<CoverMode, string> = {
-  auto: "🤖",
-  frame: "🎞️",
-  upload: "📤",
-}
-
-const CoverSelector: React.FC<CoverSelectorProps> = ({
-  open,
-  onClose,
-  config,
-  onChange,
-  totalDuration,
-}) => {
-  const fileInputRef = useRef<HTMLInputElement>(null)
-  const [isDragging, setIsDragging] = useState(false)
-
-  const update = useCallback(
-    (partial: Partial<CoverConfig>) => {
-      onChange({ ...config, ...partial })
-    },
-    [config, onChange],
-  )
-
-  const handleReset = useCallback(() => {
-    onChange({ ...DEFAULT_COVER_CONFIG, enabled: config.enabled })
-  }, [config.enabled, onChange])
-
-  /** 切换模式 */
-  const handleModeChange = useCallback(
-    (mode: CoverMode) => {
-      update({ mode })
-    },
-    [update],
-  )
-
-  /** 处理文件上传 */
-  const handleFileUpload = useCallback(
-    (file: File) => {
-      if (!file.type.startsWith("image/")) return
-      const reader = new FileReader()
-      reader.onload = (e) => {
-        const url = e.target?.result as string
-        update({ upload_url: url, thumbnail_url: url, mode: "upload" })
-      }
-      reader.readAsDataURL(file)
-    },
-    [update],
-  )
-
-  /** 拖拽上传 */
-  const handleDrop = useCallback(
-    (e: React.DragEvent) => {
-      e.preventDefault()
-      setIsDragging(false)
-      const file = e.dataTransfer.files[0]
-      if (file) handleFileUpload(file)
-    },
-    [handleFileUpload],
-  )
-
-  /** 使用 AI 推荐时间 */
-  const handleUseAiSuggestion = useCallback(() => {
-    if (config.ai_suggested_time !== null) {
-      update({ frame_time: config.ai_suggested_time, mode: "frame" })
-    }
-  }, [config.ai_suggested_time, update])
-
-  /** 格式化时间 */
-  const formatTime = (seconds: number) => {
-    const m = Math.floor(seconds / 60)
-    const s = Math.floor(seconds % 60)
-    const ms = Math.floor((seconds % 1) * 10)
-    return `${m.toString().padStart(2, "0")}:${s.toString().padStart(2, "0")}.${ms}`
-  }
-
-  return (
-    <Drawer
-      title="封面选择"
-      placement="right"
-      width={440}
-      open={open}
-      onClose={onClose}
-      className="cover-selector-drawer"
-    >
-      {/* 顶部开关 */}
-      <div className="cover-header">
-        <span className="cover-header-label">启用自定义封面</span>
-        <label className="cover-switch">
-          <input
-            type="checkbox"
-            checked={config.enabled}
-            onChange={(e) => update({ enabled: e.target.checked })}
-          />
-          <span className="cover-switch-slider" />
-        </label>
-      </div>
-
-      {/* 模式选择 */}
-      <div className="cover-mode-section">
-        <div className="cover-section-title">封面来源</div>
-        <div className="cover-mode-tabs">
-          {(["auto", "frame", "upload"] as CoverMode[]).map((m) => (
-            <button
-              key={m}
-              className={`cover-mode-tab${config.mode === m ? " active" : ""}`}
-              onClick={() => handleModeChange(m)}
-            >
-              <span className="cover-mode-icon">{MODE_ICONS[m]}</span>
-              <span className="cover-mode-label">{MODE_LABELS[m]}</span>
-            </button>
-          ))}
-        </div>
-      </div>
-
-      {/* 模式内容区 */}
-      <div className="cover-mode-content">
-        {/* 智能封面 */}
-        {config.mode === "auto" && (
-          <div className="cover-auto-section">
-            <div className="cover-auto-desc">
-              AI 将分析视频内容，自动选择最具吸引力的画面作为封面。
-            </div>
-            {config.ai_suggested_time !== null ? (
-              <div className="cover-auto-suggestion">
-                <div className="cover-auto-badge">AI 推荐</div>
-                <div className="cover-auto-time">
-                  推荐时间点：{formatTime(config.ai_suggested_time)}
-                </div>
-                <button className="cover-auto-use-btn" onClick={handleUseAiSuggestion}>
-                  使用此时间点
-                </button>
-              </div>
-            ) : (
-              <div className="cover-auto-pending">
-                <div className="cover-auto-spinner" />
-                <span>AI 分析中...（生成视频后自动推荐）</span>
-              </div>
-            )}
-          </div>
-        )}
-
-        {/* 抽帧选封面 */}
-        {config.mode === "frame" && (
-          <div className="cover-frame-section">
-            <div className="cover-frame-preview">
-              <div className="cover-frame-placeholder">
-                <span className="cover-frame-icon">🎞️</span>
-                <span className="cover-frame-time">{formatTime(config.frame_time)}</span>
-              </div>
-            </div>
-            <div className="cover-frame-timeline">
-              <div className="cover-frame-slider-header">
-                <span className="cover-frame-slider-label">拖动选择封面帧</span>
-                <span className="cover-frame-slider-value">{formatTime(config.frame_time)}</span>
-              </div>
-              <input
-                type="range"
-                className="cover-frame-slider"
-                min={0}
-                max={Math.max(totalDuration, 1)}
-                step={0.1}
-                value={config.frame_time}
-                onChange={(e) => update({ frame_time: Number(e.target.value) })}
-              />
-              <div className="cover-frame-range">
-                <span>00:00</span>
-                <span>{formatTime(totalDuration)}</span>
-              </div>
-            </div>
-            {/* 快捷时间点 */}
-            <div className="cover-frame-quick">
-              <span className="cover-quick-label">快捷选帧：</span>
-              {[0, 0.25, 0.5, 0.75].map((ratio) => {
-                const t = totalDuration * ratio
-                return (
-                  <button
-                    key={ratio}
-                    className="cover-quick-btn"
-                    onClick={() => update({ frame_time: t })}
-                  >
-                    {formatTime(t)}
-                  </button>
-                )
-              })}
-            </div>
-          </div>
-        )}
-
-        {/* 上传封面 */}
-        {config.mode === "upload" && (
-          <div className="cover-upload-section">
-            <div
-              className={`cover-upload-area${isDragging ? " dragging" : ""}`}
-              onDragOver={(e) => {
-                e.preventDefault()
-                setIsDragging(true)
-              }}
-              onDragLeave={() => setIsDragging(false)}
-              onDrop={handleDrop}
-              onClick={() => fileInputRef.current?.click()}
-            >
-              {config.upload_url ? (
-                <div className="cover-upload-preview">
-                  <img src={config.upload_url} alt="封面预览" />
-                  <div className="cover-upload-overlay">点击更换</div>
-                </div>
-              ) : (
-                <div className="cover-upload-placeholder">
-                  <span className="cover-upload-icon">📤</span>
-                  <span className="cover-upload-text">点击或拖拽上传封面图片</span>
-                  <span className="cover-upload-hint">支持 JPG / PNG，建议 16:9 比例</span>
-                </div>
-              )}
-              <input
-                ref={fileInputRef}
-                type="file"
-                accept="image/*"
-                style={{ display: "none" }}
-                onChange={(e) => {
-                  const file = e.target.files?.[0]
-                  if (file) handleFileUpload(file)
-                }}
-              />
-            </div>
-          </div>
-        )}
-      </div>
-
-      {/* 封面预览 */}
-      <div className="cover-preview-section">
-        <div className="cover-section-title">封面预览</div>
-        <div className="cover-preview-box">
-          {config.upload_url ? (
-            <img src={config.upload_url} alt="封面预览" className="cover-preview-img" />
-          ) : (
-            <div className="cover-preview-placeholder">
-              <span className="cover-preview-icon">🖼️</span>
-              <span className="cover-preview-text">
-                {config.mode === "auto"
-                  ? "AI 智能选择"
-                  : config.mode === "frame"
-                    ? `帧 ${formatTime(config.frame_time)}`
-                    : "未上传封面"}
-              </span>
-            </div>
-          )}
-          <div className="cover-preview-ratio">16:9</div>
-        </div>
-      </div>
-
-      {/* 底部 */}
-      <div className="cover-footer">
-        <button className="cover-reset-btn" onClick={handleReset}>
-          重置封面
-        </button>
-      </div>
-    </Drawer>
-  )
-}
-
-export default CoverSelector
+export { default } from "./cover-selector"

apps/web/src/pages/editing-planner/components/cover-selector/CoverModePanels.tsx

@@ -0,0 +1,143 @@
+import React from "react"
+import type { CoverConfig } from "../../types"
+
+interface CoverAutoModeProps {
+  config: CoverConfig
+  formatTime: (s: number) => string
+  onUseAiSuggestion: () => void
+}
+
+/** 智能封面模式面板 */
+export const CoverAutoMode: React.FC<CoverAutoModeProps> = ({
+  config,
+  formatTime,
+  onUseAiSuggestion,
+}) => (
+  <div className="cover-auto-section">
+    <div className="cover-auto-desc">AI 将分析视频内容，自动选择最具吸引力的画面作为封面。</div>
+    {config.ai_suggested_time !== null ? (
+      <div className="cover-auto-suggestion">
+        <div className="cover-auto-badge">AI 推荐</div>
+        <div className="cover-auto-time">推荐时间点：{formatTime(config.ai_suggested_time)}</div>
+        <button className="cover-auto-use-btn" onClick={onUseAiSuggestion}>
+          使用此时间点
+        </button>
+      </div>
+    ) : (
+      <div className="cover-auto-pending">
+        <div className="cover-auto-spinner" />
+        <span>AI 分析中...（生成视频后自动推荐）</span>
+      </div>
+    )}
+  </div>
+)
+
+interface CoverFrameModeProps {
+  config: CoverConfig
+  totalDuration: number
+  formatTime: (s: number) => string
+  onFrameTimeChange: (time: number) => void
+}
+
+/** 抽帧选封面模式面板 */
+export const CoverFrameMode: React.FC<CoverFrameModeProps> = ({
+  config,
+  totalDuration,
+  formatTime,
+  onFrameTimeChange,
+}) => (
+  <div className="cover-frame-section">
+    <div className="cover-frame-preview">
+      <div className="cover-frame-placeholder">
+        <span className="cover-frame-icon">🎞️</span>
+        <span className="cover-frame-time">{formatTime(config.frame_time)}</span>
+      </div>
+    </div>
+    <div className="cover-frame-timeline">
+      <div className="cover-frame-slider-header">
+        <span className="cover-frame-slider-label">拖动选择封面帧</span>
+        <span className="cover-frame-slider-value">{formatTime(config.frame_time)}</span>
+      </div>
+      <input
+        type="range"
+        className="cover-frame-slider"
+        min={0}
+        max={Math.max(totalDuration, 1)}
+        step={0.1}
+        value={config.frame_time}
+        onChange={(e) => onFrameTimeChange(Number(e.target.value))}
+      />
+      <div className="cover-frame-range">
+        <span>00:00</span>
+        <span>{formatTime(totalDuration)}</span>
+      </div>
+    </div>
+    <div className="cover-frame-quick">
+      <span className="cover-quick-label">快捷选帧：</span>
+      {[0, 0.25, 0.5, 0.75].map((ratio) => {
+        const t = totalDuration * ratio
+        return (
+          <button key={ratio} className="cover-quick-btn" onClick={() => onFrameTimeChange(t)}>
+            {formatTime(t)}
+          </button>
+        )
+      })}
+    </div>
+  </div>
+)
+
+interface CoverUploadModeProps {
+  config: CoverConfig
+  isDragging: boolean
+  fileInputRef: React.RefObject<HTMLInputElement>
+  onDragOver: (e: React.DragEvent) => void
+  onDragLeave: () => void
+  onDrop: (e: React.DragEvent) => void
+  onAreaClick: () => void
+  onFileChange: (file: File) => void
+}
+
+/** 上传封面模式面板 */
+export const CoverUploadMode: React.FC<CoverUploadModeProps> = ({
+  config,
+  isDragging,
+  fileInputRef,
+  onDragOver,
+  onDragLeave,
+  onDrop,
+  onAreaClick,
+  onFileChange,
+}) => (
+  <div className="cover-upload-section">
+    <div
+      className={`cover-upload-area${isDragging ? " dragging" : ""}`}
+      onDragOver={onDragOver}
+      onDragLeave={onDragLeave}
+      onDrop={onDrop}
+      onClick={onAreaClick}
+    >
+      {config.upload_url ? (
+        <div className="cover-upload-preview">
+          <img src={config.upload_url} alt="封面预览" />
+          <div className="cover-upload-overlay">点击更换</div>
+        </div>
+      ) : (
+        <div className="cover-upload-placeholder">
+          <span className="cover-upload-icon">📤</span>
+          <span className="cover-upload-text">点击或拖拽上传封面图片</span>
+          <span className="cover-upload-hint">支持 JPG / PNG，建议 16:9 比例</span>
+        </div>
+      )}
+      <input
+        ref={fileInputRef}
+        type="file"
+        accept="image/*"
+        style={{ display: "none" }}
+        onChange={(e) => {
+          const file = e.target.files?.[0]
+          if (file) onFileChange(file)
+        }}
+      />
+    </div>
+  </div>
+)

apps/web/src/pages/editing-planner/components/cover-selector/index.tsx

@@ -0,0 +1,146 @@
+/**
+ * 封面选择器
+ * 抽帧选封面 + 上传自定义封面 + 智能封面推荐
+ */
+import React from "react"
+import { Drawer } from "antd"
+import type { CoverConfig, CoverMode } from "../../types"
+import { useCoverSelector, MODE_LABELS, MODE_ICONS } from "./useCoverSelector"
+import { CoverAutoMode, CoverFrameMode, CoverUploadMode } from "./CoverModePanels"
+
+interface CoverSelectorProps {
+  open: boolean
+  onClose: () => void
+  config: CoverConfig
+  onChange: (config: CoverConfig) => void
+  totalDuration: number
+}
+
+const CoverSelector: React.FC<CoverSelectorProps> = ({
+  open,
+  onClose,
+  config,
+  onChange,
+  totalDuration,
+}) => {
+  const {
+    fileInputRef,
+    isDragging,
+    setIsDragging,
+    update,
+    handleReset,
+    handleModeChange,
+    handleFileUpload,
+    handleDrop,
+    handleUseAiSuggestion,
+    formatTime,
+  } = useCoverSelector({ config, onChange })
+
+  return (
+    <Drawer
+      title="封面选择"
+      placement="right"
+      width={440}
+      open={open}
+      onClose={onClose}
+      className="cover-selector-drawer"
+    >
+      {/* 顶部开关 */}
+      <div className="cover-header">
+        <span className="cover-header-label">启用自定义封面</span>
+        <label className="cover-switch">
+          <input
+            type="checkbox"
+            checked={config.enabled}
+            onChange={(e) => update({ enabled: e.target.checked })}
+          />
+          <span className="cover-switch-slider" />
+        </label>
+      </div>
+
+      {/* 模式选择 */}
+      <div className="cover-mode-section">
+        <div className="cover-section-title">封面来源</div>
+        <div className="cover-mode-tabs">
+          {(["auto", "frame", "upload"] as CoverMode[]).map((m) => (
+            <button
+              key={m}
+              className={`cover-mode-tab${config.mode === m ? " active" : ""}`}
+              onClick={() => handleModeChange(m)}
+            >
+              <span className="cover-mode-icon">{MODE_ICONS[m]}</span>
+              <span className="cover-mode-label">{MODE_LABELS[m]}</span>
+            </button>
+          ))}
+        </div>
+      </div>
+
+      {/* 模式内容区 */}
+      <div className="cover-mode-content">
+        {config.mode === "auto" && (
+          <CoverAutoMode
+            config={config}
+            formatTime={formatTime}
+            onUseAiSuggestion={handleUseAiSuggestion}
+          />
+        )}
+
+        {config.mode === "frame" && (
+          <CoverFrameMode
+            config={config}
+            totalDuration={totalDuration}
+            formatTime={formatTime}
+            onFrameTimeChange={(t) => update({ frame_time: t })}
+          />
+        )}
+
+        {config.mode === "upload" && (
+          <CoverUploadMode
+            config={config}
+            isDragging={isDragging}
+            fileInputRef={fileInputRef}
+            onDragOver={(e) => {
+              e.preventDefault()
+              setIsDragging(true)
+            }}
+            onDragLeave={() => setIsDragging(false)}
+            onDrop={handleDrop}
+            onAreaClick={() => fileInputRef.current?.click()}
+            onFileChange={handleFileUpload}
+          />
+        )}
+      </div>
+
+      {/* 封面预览 */}
+      <div className="cover-preview-section">
+        <div className="cover-section-title">封面预览</div>
+        <div className="cover-preview-box">
+          {config.upload_url ? (
+            <img src={config.upload_url} alt="封面预览" className="cover-preview-img" />
+          ) : (
+            <div className="cover-preview-placeholder">
+              <span className="cover-preview-icon">🖼️</span>
+              <span className="cover-preview-text">
+                {config.mode === "auto"
+                  ? "AI 智能选择"
+                  : config.mode === "frame"
+                    ? `帧 ${formatTime(config.frame_time)}`
+                    : "未上传封面"}
+              </span>
+            </div>
+          )}
+          <div className="cover-preview-ratio">16:9</div>
+        </div>
+      </div>
+
+      {/* 底部 */}
+      <div className="cover-footer">
+        <button className="cover-reset-btn" onClick={handleReset}>
+          重置封面
+        </button>
+      </div>
+    </Drawer>
+  )
+}
+
+export default CoverSelector

apps/web/src/pages/editing-planner/components/cover-selector/useCoverSelector.ts

@@ -0,0 +1,98 @@
+import { useCallback, useRef, useState } from "react"
+import type { CoverConfig, CoverMode } from "../../types"
+import { DEFAULT_COVER_CONFIG } from "../../types"
+
+/** 封面模式标签 */
+export const MODE_LABELS: Record<CoverMode, string> = {
+  auto: "智能封面",
+  frame: "抽帧选封面",
+  upload: "上传封面",
+}
+
+/** 封面模式图标 */
+export const MODE_ICONS: Record<CoverMode, string> = {
+  auto: "🤖",
+  frame: "🎞️",
+  upload: "📤",
+}
+
+interface UseCoverSelectorOptions {
+  config: CoverConfig
+  onChange: (config: CoverConfig) => void
+}
+
+/**
+ * 封面选择器 Hook
+ * 封装状态管理、文件上传、模式切换等逻辑
+ */
+export function useCoverSelector({ config, onChange }: UseCoverSelectorOptions) {
+  const fileInputRef = useRef<HTMLInputElement>(null)
+  const [isDragging, setIsDragging] = useState(false)
+
+  const update = useCallback(
+    (partial: Partial<CoverConfig>) => {
+      onChange({ ...config, ...partial })
+    },
+    [config, onChange],
+  )
+
+  const handleReset = useCallback(() => {
+    onChange({ ...DEFAULT_COVER_CONFIG, enabled: config.enabled })
+  }, [config.enabled, onChange])
+
+  const handleModeChange = useCallback(
+    (mode: CoverMode) => {
+      update({ mode })
+    },
+    [update],
+  )
+
+  const handleFileUpload = useCallback(
+    (file: File) => {
+      if (!file.type.startsWith("image/")) return
+      const reader = new FileReader()
+      reader.onload = (e) => {
+        const url = e.target?.result as string
+        update({ upload_url: url, thumbnail_url: url, mode: "upload" })
+      }
+      reader.readAsDataURL(file)
+    },
+    [update],
+  )
+
+  const handleDrop = useCallback(
+    (e: React.DragEvent) => {
+      e.preventDefault()
+      setIsDragging(false)
+      const file = e.dataTransfer.files[0]
+      if (file) handleFileUpload(file)
+    },
+    [handleFileUpload],
+  )
+
+  const handleUseAiSuggestion = useCallback(() => {
+    if (config.ai_suggested_time !== null) {
+      update({ frame_time: config.ai_suggested_time, mode: "frame" })
+    }
+  }, [config.ai_suggested_time, update])
+
+  const formatTime = (seconds: number) => {
+    const m = Math.floor(seconds / 60)
+    const s = Math.floor(seconds % 60)
+    const ms = Math.floor((seconds % 1) * 10)
+    return `${m.toString().padStart(2, "0")}:${s.toString().padStart(2, "0")}.${ms}`
+  }
+
+  return {
+    fileInputRef,
+    isDragging,
+    setIsDragging,
+    update,
+    handleReset,
+    handleModeChange,
+    handleFileUpload,
+    handleDrop,
+    handleUseAiSuggestion,
+    formatTime,
+  }
+}