diff --git a/web/src/appRoutes.tsx b/web/src/appRoutes.tsx
index 1bdd869..1fea31d 100644
--- a/web/src/appRoutes.tsx
+++ b/web/src/appRoutes.tsx
@@ -2,25 +2,34 @@
 import { lazy, type ReactElement } from 'react'
 import { Navigate } from 'react-router-dom'
 
-const HomePage = lazy(() => import('./pages/HomePage').then((m) => ({ default: m.HomePage })))
-const LibraryPage = lazy(() => import('./pages/LibraryPage').then((m) => ({ default: m.LibraryPage })))
-const LibrariesPage = lazy(() => import('./pages/LibrariesPage').then((m) => ({ default: m.LibrariesPage })))
-const FavouritesPage = lazy(() => import('./pages/FavouritesPage').then((m) => ({ default: m.FavouritesPage })))
-const PlaylistsPage = lazy(() => import('./pages/PlaylistsPage').then((m) => ({ default: m.PlaylistsPage })))
-const PlaylistDetailPage = lazy(() =>
-  import('./pages/PlaylistDetailPage').then((m) => ({ default: m.PlaylistDetailPage })),
-)
-const MediaDetailPage = lazy(() => import('./pages/MediaDetailPage').then((m) => ({ default: m.MediaDetailPage })))
-const PlayerPage = lazy(() => import('./pages/PlayerPage').then((m) => ({ default: m.PlayerPage })))
+const HomePageLoader = () => import('./pages/HomePage').then((m) => ({ default: m.HomePage }))
+const LibraryPageLoader = () => import('./pages/LibraryPage').then((m) => ({ default: m.LibraryPage }))
+const LibrariesPageLoader = () => import('./pages/LibrariesPage').then((m) => ({ default: m.LibrariesPage }))
+const FavouritesPageLoader = () => import('./pages/FavouritesPage').then((m) => ({ default: m.FavouritesPage }))
+const PlaylistsPageLoader = () => import('./pages/PlaylistsPage').then((m) => ({ default: m.PlaylistsPage }))
+const PlaylistDetailPageLoader = () =>
+  import('./pages/PlaylistDetailPage').then((m) => ({ default: m.PlaylistDetailPage }))
+const MediaDetailPageLoader = () =>
+  import('./pages/MediaDetailPage').then((m) => ({ default: m.MediaDetailPage }))
+const PlayerPageLoader = () => import('./pages/PlayerPage').then((m) => ({ default: m.PlayerPage }))
+const WatchHistoryPageLoader = () =>
+  import('./pages/WatchHistoryPage').then((m) => ({ default: m.WatchHistoryPage }))
+
+const HomePage = lazy(HomePageLoader)
+const LibraryPage = lazy(LibraryPageLoader)
+const LibrariesPage = lazy(LibrariesPageLoader)
+const FavouritesPage = lazy(FavouritesPageLoader)
+const PlaylistsPage = lazy(PlaylistsPageLoader)
+const PlaylistDetailPage = lazy(PlaylistDetailPageLoader)
+const MediaDetailPage = lazy(MediaDetailPageLoader)
+const PlayerPage = lazy(PlayerPageLoader)
 const AdminPage = lazy(() => import('./pages/AdminPage').then((m) => ({ default: m.AdminPage })))
 const ProfilePage = lazy(() => import('./pages/ProfilePage').then((m) => ({ default: m.ProfilePage })))
 const DlnaPage = lazy(() => import('./pages/DlnaPage').then((m) => ({ default: m.DlnaPage })))
 const FileManagerPage = lazy(() =>
   import('./pages/FileManagerPage').then((m) => ({ default: m.FileManagerPage })),
 )
-const WatchHistoryPage = lazy(() =>
-  import('./pages/WatchHistoryPage').then((m) => ({ default: m.WatchHistoryPage })),
-)
+const WatchHistoryPage = lazy(WatchHistoryPageLoader)
 const PosterWallPage = lazy(() => import('./pages/PosterWallPage').then((m) => ({ default: m.PosterWallPage })))
 const ProfileManagementPage = lazy(() =>
   import('./pages/ProfileManagementPage').then((m) => ({ default: m.ProfileManagementPage })),
@@ -37,6 +46,34 @@ const StrmUploadQueuePage = lazy(() =>
 const ScraperQueuePage = lazy(() => import('./pages/ScraperQueuePage').then((m) => ({ default: m.ScraperQueuePage })))
 const TaskQueuePage = lazy(() => import('./pages/TaskQueuePage').then((m) => ({ default: m.TaskQueuePage })))
 
+// 常用页面的路由 chunk 空闲预取：应用加载完成后浏览器一空闲就把浏览路径
+// （库列表/库详情/媒体详情/播放/收藏/历史等）的 chunk 拉下来，
+// 首次点击进入时不再出现"加载中…"等 chunk 下载。失败静默（导航时会重试）。
+let prefetchStarted = false
+export function prefetchCommonRouteChunks() {
+  if (prefetchStarted || typeof window === 'undefined') return
+  prefetchStarted = true
+  const loaders = [
+    LibrariesPageLoader,
+    LibraryPageLoader,
+    MediaDetailPageLoader,
+    PlayerPageLoader,
+    FavouritesPageLoader,
+    WatchHistoryPageLoader,
+    PlaylistsPageLoader,
+  ]
+  const run = () => {
+    for (const load of loaders) {
+      load().catch(() => undefined)
+    }
+  }
+  if (typeof requestIdleCallback !== 'undefined') {
+    requestIdleCallback(run, { timeout: 5000 })
+  } else {
+    window.setTimeout(run, 2000)
+  }
+}
+
 export type AppRoute = {
   path?: string
   index?: boolean
diff --git a/web/src/components/Layout.tsx b/web/src/components/Layout.tsx
index 9016732..5c9aa56 100644
--- a/web/src/components/Layout.tsx
+++ b/web/src/components/Layout.tsx
@@ -1,5 +1,7 @@
+import { useEffect } from 'react'
 import { useLocation, useNavigate } from 'react-router-dom'
 
+import { prefetchCommonRouteChunks } from '../appRoutes'
 import { useAuthStore } from '../stores/auth'
 import { usePlayProfileStore } from '../stores/playProfile'
 import {
@@ -37,6 +39,13 @@ function isMediaView(pathname: string, search: string): boolean {
 export function Layout() {
   const navigate = useNavigate()
   const location = useLocation()
+
+  // 登录后的外壳挂载即开始空闲预取常用页面的路由 chunk，
+  // 让首次点击进入各页面时不出现"加载中…"等 chunk 下载。
+  useEffect(() => {
+    prefetchCommonRouteChunks()
+  }, [])
+
   const user = useAuthStore((s) => s.user)
   const logout = useAuthStore((s) => s.logout)
   const activeProfileId = usePlayProfileStore((s) => s.activeProfileId)
diff --git a/web/src/pages/HomePage.tsx b/web/src/pages/HomePage.tsx
index 7822908..44dec41 100644
--- a/web/src/pages/HomePage.tsx
+++ b/web/src/pages/HomePage.tsx
@@ -5,6 +5,7 @@ import { historyAPI } from '../api/history'
 import type { HistoryItem } from '../api/playback'
 import type { Library, Media } from '../types'
 import type { SeriesCard } from '../utils/groupSeries'
+import { fetchLibraries, peekLibraries } from '../utils/libraryCache'
 import { usePinnedLibraries } from '../hooks/usePinnedLibraries'
 import { sortByPinnedIds } from '../utils/pinnedLibraries'
 import {
@@ -18,7 +19,6 @@ import {
 } from './HomePageSections'
 
 const hasArtwork = (media?: Media | null) => !!(media?.poster_url || media?.backdrop_url)
-const asArray = <T,>(value: unknown): T[] => (Array.isArray(value) ? (value as T[]) : [])
 
 export function HomePage() {
   const [libraries, setLibraries] = useState<Library[]>([])
@@ -30,17 +30,24 @@ export function HomePage() {
   const [historyLoading, setHistoryLoading] = useState(true)
   const { pinnedIds } = usePinnedLibraries()
 
-  // 1. 媒体库元数据极速加载（不带 preview，毫秒级秒开首屏）
+  // 1. 媒体库元数据极速加载（不带 preview，毫秒级秒开首屏）。
+  //    会话内已有缓存则先用缓存立即渲染，后台仍刷新一次兜底。
   useEffect(() => {
     let cancelled = false
 
-    libraryAPI
-      .list()
-      .then((rows) => asArray<Library>(rows))
+    const cached = peekLibraries()
+    if (cached && cached.length > 0) {
+      setLibraries(cached)
+      setLibrariesLoading(false)
+    }
+
+    fetchLibraries()
+      .then((rows) => (Array.isArray(rows) ? rows : []))
       .catch(() => [] as Library[])
       .then((libs) => {
         if (cancelled) return
-        setLibraries(libs)
+        // 失败兜底返回空数组时，不要覆盖已先行渲染的缓存数据
+        setLibraries((prev) => (libs.length === 0 && prev.length > 0 ? prev : libs))
         setLibrariesLoading(false)
       })
 
diff --git a/web/src/pages/LibrariesPage.tsx b/web/src/pages/LibrariesPage.tsx
index 72701f6..228205b 100644
--- a/web/src/pages/LibrariesPage.tsx
+++ b/web/src/pages/LibrariesPage.tsx
@@ -12,6 +12,7 @@ import {
 import type { LibraryPreview } from './librariesPageModel'
 import type { Library } from '../types'
 import type { SeriesCard } from '../utils/groupSeries'
+import { fetchLibraries, invalidateLibraries, peekLibraries } from '../utils/libraryCache'
 import { sortLibraryPreviews } from '../utils/pinnedLibraries'
 
 export function LibrariesPage() {
@@ -53,10 +54,18 @@ export function LibrariesPage() {
     }
   }, [])
 
-  const loadLibraries = useCallback(async () => {
-    setLoading(true)
+  const loadLibraries = useCallback(async (options?: { force?: boolean }) => {
+    if (options?.force) invalidateLibraries()
+    // 会话缓存命中时先行渲染，避免每次进入都白等一轮请求
+    const cached = peekLibraries()
+    if (cached) {
+      setLibraries(cached)
+      setLoading(false)
+    } else {
+      setLoading(true)
+    }
     try {
-      const libs = await libraryAPI.list()
+      const libs = await fetchLibraries()
       setLibraries(libs)
       // 优先拉取入口卡片网格当前页（前 20 个库）的预览
       const topIds = libs.slice(0, 20).map((l) => l.id)
@@ -82,7 +91,7 @@ export function LibrariesPage() {
 
   const handleManageLibraries = async () => {
     await openManageLibrariesDialog()
-    await loadLibraries()
+    await loadLibraries({ force: true })
   }
 
   useEffect(() => {
diff --git a/web/src/pages/useAdminLibraryPanel.ts b/web/src/pages/useAdminLibraryPanel.ts
index 57b7c21..4cd7aba 100644
--- a/web/src/pages/useAdminLibraryPanel.ts
+++ b/web/src/pages/useAdminLibraryPanel.ts
@@ -3,6 +3,7 @@ import toast from 'react-hot-toast'
 
 import { libraryAPI } from '../api/library'
 import type { Library, LibraryRoot } from '../types'
+import { invalidateLibraries } from '../utils/libraryCache'
 import { confirmAction } from '../components/confirmAction'
 import { apiErrorMessage, createRootPayload, displayLibraryRootName, displayLibraryRootPath, emptyRootDraft, rootDraftKey, type RootDraft } from './adminLibraryPanelModel'
 
@@ -18,10 +19,14 @@ export function useAdminLibraryPanel() {
 
 function useAdminLibraryList() {
   const [libs, setLibs] = useState<Library[]>([])
-  const refresh = () =>
-    libraryAPI
+  const refresh = () => {
+    // 后台任何库变更都会走到这里；顺带清掉前台会话缓存，
+    // 避免返回首页/媒体库页后 30 秒 TTL 内还显示旧列表。
+    invalidateLibraries()
+    return libraryAPI
       .list({ includeHidden: true })
       .then((libs) => setLibs(libs.filter((l) => !l.is_remote_emby)))  // 远程挂载库只读，不在后台管理列表内
+  }
 
   useEffect(() => {
     refresh().catch(() => undefined)
diff --git a/web/src/pages/useLibraryData.ts b/web/src/pages/useLibraryData.ts
index ed3706a..719b7ca 100644
--- a/web/src/pages/useLibraryData.ts
+++ b/web/src/pages/useLibraryData.ts
@@ -3,6 +3,7 @@ import toast from 'react-hot-toast'
 
 import { libraryAPI } from '../api/library'
 import type { Library, Media } from '../types'
+import { peekLibrary, resolveLibrary } from '../utils/libraryCache'
 import { groupSeries, isEpisodeLike, type SeriesCard } from '../utils/groupSeries'
 
 export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | null) {
@@ -25,74 +26,79 @@ export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | n
     return groupSeries(items)
   }, [isSeries, isSeriesLibrary, items, serverSeriesCards])
 
+  // reloadCurrentLibrary 通过自增 tick 重跑加载（原实现靠克隆 library 对象
+  // 触发第二个 effect，这里合并成单个 bootstrap effect 后改用显式信号）。
+  const [reloadTick, setReloadTick] = useState(0)
+
   useEffect(() => {
     if (!libraryID) return
     let cancelled = false
     setLoading(true)
+    setLoadingAll(false)
     setLibrary(null)
     setItems([])
     setServerSeriesCards([])
     setSeriesEpisodeItems([])
-    libraryAPI.get(libraryID)
-      .then((lib) => {
-        if (!cancelled) setLibrary(lib)
-      })
-      .catch(() => {
+
+    const bootstrap = async () => {
+      // 库信息先查会话缓存（首页/全部媒体库页已拉过全量列表），命中则
+      // 同步就绪，内容请求在挂载当帧即发出；未命中才退回单独请求，
+      // 消除原先"先等库信息、再等内容"的两段串行首屏等待。
+      let lib = peekLibrary(libraryID)
+      if (lib) setLibrary(lib)
+      try {
+        const resolved = await resolveLibrary(libraryID)
+        if (cancelled) return
+        if (!lib) {
+          lib = resolved
+          setLibrary(lib)
+        }
+      } catch {
         if (!cancelled) {
-          setLibrary(null)
           setLoading(false)
           toast.error('媒体库不存在或无权限')
         }
-      })
-    return () => { cancelled = true }
-  }, [libraryID])
-
-  useEffect(() => {
-    if (!libraryID || !library) return
-    let cancelled = false
-    setLoading(true)
-    setLoadingAll(true)
-    setItems([])
-    setServerSeriesCards([])
-    setSeriesEpisodeItems([])
-
-    const loadAll = async () => {
-      if (isSeriesLibrary) {
-        const collected = await loadAllSeriesCards(libraryID, library.is_remote_emby, (next) => {
-          if (cancelled) return
-          setTotal(next.total)
-          if (next.firstPage) {
-            setServerSeriesCards(next.items)
-            setLoading(false)
-          }
-        })
-        if (!cancelled) setServerSeriesCards(collected.items)
         return
       }
 
-      const collected = await loadAllMedia(libraryID, library.is_remote_emby, (next) => {
-        if (cancelled) return
-        setTotal(next.total)
-        if (next.firstPage) {
-          setItems(next.items)
-          setLoading(false)
+      const seriesLibrary = isSeriesLibraryType(lib.type)
+      setLoadingAll(true)
+      try {
+        if (seriesLibrary) {
+          const collected = await loadAllSeriesCards(libraryID, lib.is_remote_emby, (next) => {
+            if (cancelled) return
+            setTotal(next.total)
+            if (next.firstPage) {
+              setServerSeriesCards(next.items)
+              setLoading(false)
+            }
+          })
+          if (!cancelled) setServerSeriesCards(collected.items)
+          return
         }
-      })
-      if (!cancelled) setItems(collected.items)
-    }
 
-    loadAll()
-      .catch(() => {
+        const collected = await loadAllMedia(libraryID, lib.is_remote_emby, (next) => {
+          if (cancelled) return
+          setTotal(next.total)
+          if (next.firstPage) {
+            setItems(next.items)
+            setLoading(false)
+          }
+        })
+        if (!cancelled) setItems(collected.items)
+      } catch {
         if (!cancelled) toast.error('媒体库加载失败')
-      })
-      .finally(() => {
+      } finally {
         if (!cancelled) {
           setLoading(false)
           setLoadingAll(false)
         }
-      })
+      }
+    }
+
+    void bootstrap()
     return () => { cancelled = true }
-  }, [libraryID, library, isSeriesLibrary])
+  }, [libraryID, reloadTick])
 
   useEffect(() => {
     if (!libraryID || !isSeriesLibrary || !selectedSeries) {
@@ -117,7 +123,7 @@ export function useLibraryData(libraryID: string, selectedSeries: SeriesCard | n
   }, [libraryID, isSeriesLibrary, selectedSeries])
 
   const reloadCurrentLibrary = useCallback(() => {
-    setLibrary((current) => (current ? { ...current } : current))
+    setReloadTick((tick) => tick + 1)
   }, [])
 
   const loadingAllText = loadingAll && !loading && (isSeriesLibrary ? total > serverSeriesCards.length : total > items.length)
diff --git a/web/src/pages/useMediaDetailPageState.ts b/web/src/pages/useMediaDetailPageState.ts
index b4d2975..b8fddc6 100644
--- a/web/src/pages/useMediaDetailPageState.ts
+++ b/web/src/pages/useMediaDetailPageState.ts
@@ -143,21 +143,27 @@ function useMediaDetailRefresh({
     setLoading(true)
     setLoadingEpisodes(true)
     try {
-      const nextMedia = await mediaAPI.get(id)
+      // 三个请求并行发出；详情一到就解锁整页渲染，收藏状态与分集列表
+      // 到达后各自补齐（原先完全串行，首屏要排队等满三个往返）。
+      const nextMediaPromise = mediaAPI.get(id)
+      const favouritesPromise = playbackAPI.listFavourites().catch(() => [])
+      const episodesPromise = mediaAPI
+        .getEpisodes(id)
+        .then((r) => r.items ?? [])
+        .catch(() => [])
+
+      const nextMedia = await nextMediaPromise
       setMedia(nextMedia)
-      const favourites = await playbackAPI.listFavourites().catch(() => [])
+      setLoading(false)
+
+      const favourites = await favouritesPromise
       setFavourite(favourites.some((item) => item.id === nextMedia.id))
-      // 异步加载分集列表
-      try {
-        const epRes = await mediaAPI.getEpisodes(id)
-        setEpisodes(epRes.items ?? [])
-      } catch {
-        setEpisodes([])
-      } finally {
-        setLoadingEpisodes(false)
-      }
+
+      const episodes = await episodesPromise
+      setEpisodes(episodes)
     } finally {
       setLoading(false)
+      setLoadingEpisodes(false)
     }
   }, [id, setFavourite, setLoading, setMedia, setEpisodes, setLoadingEpisodes])
 }
diff --git a/web/src/utils/libraryCache.ts b/web/src/utils/libraryCache.ts
new file mode 100644
index 0000000..de3649c
--- /dev/null
+++ b/web/src/utils/libraryCache.ts
@@ -0,0 +1,89 @@
+import { libraryAPI } from '../api/library'
+import type { Library } from '../types'
+
+// 会话级媒体库元数据缓存（不落 localStorage）。
+// 首页 / 媒体库页 / 媒体库详情页都要先拿库列表或库信息才能渲染，
+// 同一会话内反复进出这些页面时直接命中缓存，避免每次都等一整轮请求。
+// TTL 内直接返回缓存；过期后重新请求并刷新。并发调用共享同一个在途请求。
+
+const LIST_TTL_MS = 30_000
+const LIBRARY_TTL_MS = 30_000
+
+let listData: Library[] | null = null
+let listAt = 0
+let listInflight: Promise<Library[]> | null = null
+
+const byId = new Map<string, { at: number; data: Library }>()
+const byIdInflight = new Map<string, Promise<Library>>()
+
+function fresh(at: number, ttl: number): boolean {
+  return Date.now() - at < ttl
+}
+
+function rememberList(data: Library[]) {
+  listData = data
+  listAt = Date.now()
+  for (const lib of data) {
+    byId.set(lib.id, { at: listAt, data: lib })
+  }
+}
+
+// fetchLibraries 拉取库列表：TTL 内命中缓存立即返回（含 peek 先行渲染），
+// 过期或未缓存时发起请求，并发调用共享在途请求。
+export function fetchLibraries(): Promise<Library[]> {
+  if (listData && fresh(listAt, LIST_TTL_MS)) return Promise.resolve(listData)
+  if (!listInflight) {
+    listInflight = libraryAPI
+      .list()
+      .then((rows) => {
+        const data = Array.isArray(rows) ? rows : []
+        rememberList(data)
+        return data
+      })
+      .finally(() => {
+        listInflight = null
+      })
+  }
+  return listInflight
+}
+
+// peekLibraries 同步返回当前缓存的库列表（可能过期），没有则 null。
+// 页面用它先行渲染上一次的数据，再由 fetchLibraries 在后台补一次刷新。
+export function peekLibraries(): Library[] | null {
+  return listData
+}
+
+// peekLibrary 同步返回单库缓存（库列表缓存也会回填单库索引）。
+export function peekLibrary(id: string): Library | null {
+  const entry = byId.get(id)
+  return entry?.data ?? null
+}
+
+// resolveLibrary 拿单个库信息：命中缓存直接返回；未命中走 /libraries/:id
+// 并回填缓存。远程 Emby 挂载库的详情接口同样返回 is_remote_emby，缓存可用。
+export function resolveLibrary(id: string): Promise<Library> {
+  const entry = byId.get(id)
+  if (entry && fresh(entry.at, LIBRARY_TTL_MS)) return Promise.resolve(entry.data)
+  const inflight = byIdInflight.get(id)
+  if (inflight) return inflight
+  const request = libraryAPI
+    .get(id)
+    .then((lib) => {
+      byId.set(id, { at: Date.now(), data: lib })
+      return lib
+    })
+    .finally(() => {
+      byIdInflight.delete(id)
+    })
+  byIdInflight.set(id, request)
+  return request
+}
+
+// invalidate 清空缓存。管理页对库做过增删改后调用，确保下次拉到新数据。
+export function invalidateLibraries() {
+  listData = null
+  listAt = 0
+  listInflight = null
+  byId.clear()
+  byIdInflight.clear()
+}