refactor(generate): 拆分 useStep2Materials Hook

三阶段重构：
- Phase 1: 拆分为 2 个子 Hook
  - useMaterialLibrary: 素材库加载（库列表 + 选中库 + 素材列表）
  - useSmartMatch: 智能素材匹配（AI匹配/换一批/全选/清空）
- Phase 2: 主 Hook 组合子 Hook + 手动选择逻辑
- Phase 3: 主文件 205→79 行（-61%）

保持导出签名向后兼容

apps/web/src/pages/generate/hooks/step2-materials/useMaterialLibrary.ts

@@ -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,
+  }
+}

apps/web/src/pages/generate/hooks/step2-materials/useSmartMatch.ts

@@ -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,
+  }
+}

apps/web/src/pages/generate/hooks/useStep2Materials.ts

@@ -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,
   }