feat: 网页端完整浏览/播放远程 Emby 挂载库

- 后端新增远程库→本地结构映射（emby_remote_web.go）：Library/Media/SeriesCard
  与本地完全同构，前端无感知
- /api/libraries（含 with_preview）、/api/libraries/:id、/api/libraries/:id/media、
  /api/libraries/:id/series、/api/libraries/:id/series/episodes、/api/media/:id、
  /api/media/:id/episodes 全部支持远程伪装 ID 透传映射
- /api/stream/:id 对远程条目 302 直连远程 Emby 原地址（播放不经过本机）
- 库内容按 CollectionType 过滤（电影库取 Movie、剧集库取 Series），
  RecursiveItemCount 作为系列集数；修复伪装 ID 双重编码导致的图片/详情 500
- SPA fallback 放行 /library/embyremote~ 前缀（不再被当作 Emby API 路由 404）
- 前端：远程库/条目标记 is_remote_emby，隐藏扫描/刮削/编辑/NFO/回收站/
  HLS 转码等不适用操作；后台管理面板过滤远程库

web/src/pages/LibraryMovieActions.tsx

@@ -1,6 +1,7 @@
 import { Database, FileText, Search, Sparkles, Trash2 } from 'lucide-react'
 
 import type { Media } from '../types'
+import { isRemoteEmbyID } from '../utils/remoteEmby'
 
 type LibraryMovieActionsProps = {
   media: Media
@@ -23,6 +24,11 @@ export function LibraryMovieActions({
 }: LibraryMovieActionsProps) {
   const buttonClass = 'flex h-8 w-8 items-center justify-center rounded-lg border border-white/70 bg-white/90 text-gray-700 shadow-sm backdrop-blur transition hover:bg-brand-50 hover:text-brand-600 disabled:opacity-50'
 
+  // 远程 Emby 条目为只读视图：刮削/探测/NFO/回收站不适用。
+  if (isRemoteEmbyID(media.id)) {
+    return null
+  }
+
   return (
     <>
       <button title="智能刮削" disabled={busy} onClick={() => onSmartScrape(media)} className={buttonClass}>

web/src/pages/LibraryPageHeader.tsx

@@ -63,7 +63,7 @@ export function LibraryPageHeader({
           onChange={onSortChange}
           onReshuffle={onReshuffle}
         />
-        {isAdmin && (
+        {isAdmin && !library?.is_remote_emby && (
           <>
             <EpisodeArtworkToggle
               checked={scrapeEpisodeArtwork}

web/src/pages/LibrarySeriesDetailHeader.tsx

@@ -1,3 +1,4 @@
+import { isRemoteEmbyID } from '../utils/remoteEmby'
 import { Link } from 'react-router-dom'
 import { ArrowLeft, Database, FileText, Film, FolderInput, Pencil, Play, Search, Sparkles, Trash2 } from 'lucide-react'
 
@@ -84,7 +85,7 @@ export function LibrarySeriesDetailHeader({
             </div>
           )}
 
-          {isAdmin && allEpisodes.length > 0 && (
+          {isAdmin && allEpisodes.length > 0 && !isRemoteEmbyID(series.rep.id) && (
             <div className="rounded-2xl border border-sand-200 bg-white/80 p-4 shadow-sm">
               <p className="mb-3 text-[10px] font-bold uppercase tracking-[0.2em] text-[#c9954a]">系统后台高级控制面板</p>
               <div className="flex flex-wrap gap-2">

web/src/pages/MediaDetailAdminPanel.tsx

@@ -2,6 +2,7 @@ import { Database, FileText, FolderInput, Pencil, Search, Sparkles, Trash2 } fro
 
 import { EpisodeArtworkToggle } from '../components/EpisodeArtworkToggle'
 import type { Media } from '../types'
+import { isRemoteEmbyID } from '../utils/remoteEmby'
 
 type MediaDetailAdminPanelProps = {
   media: Media
@@ -28,6 +29,10 @@ export function MediaDetailAdminPanel({
   onExportNFO,
   onSoftDelete,
 }: MediaDetailAdminPanelProps) {
+  if (isRemoteEmbyID(media.id)) {
+    return null
+  }
+
   return (
     <div className="rounded-2xl border border-gray-200 bg-gray-50/50 p-5 space-y-3">
       <p className="text-[10px] font-bold uppercase tracking-[0.2em] text-[#c9954a]">系统后台高级控制面板</p>

web/src/pages/MediaDetailPageSections.tsx

@@ -1,3 +1,4 @@
+import { isRemoteEmbyID } from '../utils/remoteEmby'
 import { ArrowLeft, Heart, Play, RefreshCw } from 'lucide-react'
 import { Link } from 'react-router-dom'
 
@@ -95,14 +96,16 @@ export function MediaDetailPlaybackActions({
         <span>立即播放</span>
       </Link>
 
-      <Link
+      {!isRemoteEmbyID(media.id) && (
+        <Link
         to={`/play/${media.id}?mode=hls`}
         state={{ from: `/media/${media.id}` }}
         className="btn-outline border-brand-500/30 hover:border-brand-500 text-[#c9954a] hover:bg-brand-50 px-5"
       >
-        <RefreshCw size={14} className="animate-spin-slow" />
-        <span>HLS 兼容转码播放</span>
-      </Link>
+          <RefreshCw size={14} className="animate-spin-slow" />
+          <span>HLS 兼容转码播放</span>
+        </Link>
+      )}
 
       <ExternalPlayerButton mediaId={media.id} />
 

web/src/pages/useAdminLibraryPanel.ts

@@ -18,7 +18,10 @@ export function useAdminLibraryPanel() {
 
 function useAdminLibraryList() {
   const [libs, setLibs] = useState<Library[]>([])
-  const refresh = () => libraryAPI.list({ includeHidden: true }).then(setLibs)
+  const refresh = () =>
+    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)

web/src/types/library.ts

@@ -21,6 +21,9 @@ export interface Library {
   roots?: LibraryRoot[]
   created_at: string
   updated_at: string
+  /** 远程 Emby 挂载库（只读，不支持扫描/刮削/编辑） */
+  is_remote_emby?: boolean
+  remote_source?: string
 }
 
 export interface ScanResult {

web/src/utils/remoteEmby.ts

@@ -0,0 +1,6 @@
+// 远程 Emby 挂载条目 / 媒体库的识别与只读标记。
+// 与后端 internal/service/emby_remote_ids.go 的 ID 伪装协议保持一致：
+// embyremote~{accountID}~{remoteID}。
+export function isRemoteEmbyID(id?: string | null): boolean {
+  return Boolean(id && id.startsWith('embyremote~'))
+}