feat: hwaccel + Fanart/TheTVDB + AI + Discover + NFO + Tasks + Recycle bin

Backend
  - service/transcoder.go: encoder selector (software / nvenc / qsv /
    vaapi) with proper hwaccel + scale_* filters per encoder; configurable
    bitrate/preset/height/segment-seconds via transcoder.* config; new
    Active() snapshot + ActiveJob struct for the Tasks panel; unit-tested
    via buildFFmpegArgs(...).
  - service/thetvdb.go: TheTVDB v4 provider — login() caches the JWT for
    24h, SearchSeries() returns Match struct.
  - service/fanart.go: Fanart.tv provider — high-res movie artwork keyed
    by TMDb id; used to upgrade poster/backdrop after a successful match.
  - service/scraper.go: provider chain reworked — anime → Bangumi, tv →
    TheTVDB, default → TMDb, with optional Fanart upgrade post-match.
  - service/discover.go: TMDb /trending/movie/day + /movie/popular for
    the Discover rail.
  - service/ai.go: OpenAI-compatible client. SmartSearch() turns a free-
    form query into a structured SearchIntent JSON; Recommend() emits a
    short list of titles given the user's history. Disabled when
    ai.api_key is empty.
  - service/nfo.go: per-movie .nfo writer (Kodi/Jellyfin schema) +
    library-scope batch exporter.
  - service/media.go: SoftDelete / Restore / Purge / ListRecycleBin
    helpers backed by gorm Unscoped().
  - service/service.go: container wires Fanart, TheTVDB, Discover, AI,
    NFO; everything still tears down cleanly via Close().
  - config: new transcoder.* section (encoder, preset, video_bitrate,
    max_rate, buf_size, max_height, segment_seconds) with sensible
    defaults.

Handlers / routes
  - new files: discover.go, recycle.go, nfo.go, ai.go, tasks.go.
  - registers GET /tasks, /discover/{trending,popular},
    /ai/{status,search,recommend}; admin-only GET /recycle and
    DELETE/POST /media/:id (soft delete / restore / purge); admin-only
    POST /media/:id/nfo and /libraries/:id/nfo.

Frontend
  - new pages: DiscoverPage, TasksPage, RecycleBinPage; SearchPage gains
    an optional AI smart-search toggle that calls /api/ai/search.
  - MediaDetailPage gains admin actions for 导出 NFO and 移至回收站.
  - new api/ helpers: ai.ts, discover.ts, recycle.ts, tasks.ts.
  - App.tsx routes /discover, /tasks, /recycle (last two admin-only).
  - Layout sidebar groups now include Discover + Tasks + Recycle Bin.

Docker / config
  - Dockerfile: adds intel-media-driver / libva-utils / mesa-va-gallium
    so QSV + VAAPI work out of the box on Intel iGPUs.
  - docker-compose.yml: documents devices + group_add + nvidia runtime
    overrides for hardware transcoding.

Verified: go build, go vet, go test (incl. new TestBuildFFmpegArgs across
software / nvenc / qsv / vaapi encoder profiles); tsc -b && vite build
emits 22 route chunks plus the deferred hls chunk; main bundle 248 KB /
83 KB gzipped.

web/src/pages/SearchPage.tsx

@@ -1,36 +1,108 @@
-import { ChangeEvent, useEffect, useState } from 'react'
+import { ChangeEvent, FormEvent, useEffect, useState } from 'react'
+import toast from 'react-hot-toast'
+import { Sparkles } from 'lucide-react'
 
+import { aiAPI, type SearchIntent } from '../api/ai'
 import { mediaAPI } from '../api/library'
 import { MediaCard } from '../components/MediaCard'
 import type { Media } from '../types'
 
-// Search-as-you-type with a 300ms debounce.
+// SearchPage runs a fast LIKE search by default, with an optional AI
+// "smart search" toggle that calls /api/ai/search to produce a structured
+// intent before executing the library lookup.
 export function SearchPage() {
   const [q, setQ] = useState('')
   const [items, setItems] = useState<Media[]>([])
   const [loading, setLoading] = useState(false)
+  const [aiOn, setAiOn] = useState(false)
+  const [aiAvailable, setAiAvailable] = useState(false)
+  const [intent, setIntent] = useState<SearchIntent | null>(null)
 
   useEffect(() => {
+    aiAPI
+      .status()
+      .then((s) => setAiAvailable(s.enabled))
+      .catch(() => setAiAvailable(false))
+  }, [])
+
+  // Fast LIKE search-as-you-type when AI mode is OFF.
+  useEffect(() => {
+    if (aiOn) return
     const t = setTimeout(() => {
       setLoading(true)
       mediaAPI
         .search(q, 60)
-        .then((d) => setItems(d.items))
+        .then((d) => {
+          setItems(d.items)
+          setIntent(null)
+        })
         .finally(() => setLoading(false))
     }, 300)
     return () => clearTimeout(t)
-  }, [q])
+  }, [q, aiOn])
+
+  const onAISubmit = async (e: FormEvent) => {
+    e.preventDefault()
+    if (!q.trim()) return
+    setLoading(true)
+    try {
+      const data = await aiAPI.smartSearch(q)
+      setItems(data.items)
+      setIntent(data.intent)
+    } catch {
+      toast.error('AI 搜索失败')
+    } finally {
+      setLoading(false)
+    }
+  }
 
   return (
     <div className="space-y-6">
-      <h1 className="font-display text-3xl font-bold text-white">搜索</h1>
-      <input
-        autoFocus
-        className="input-base"
-        placeholder="按标题搜索…"
-        value={q}
-        onChange={(e: ChangeEvent<HTMLInputElement>) => setQ(e.target.value)}
-      />
+      <header className="flex items-center justify-between">
+        <h1 className="font-display text-3xl font-bold text-white">搜索</h1>
+        <button
+          disabled={!aiAvailable}
+          className={
+            'neon-button !px-3 !py-1 !text-xs ' +
+            (aiOn ? '!border-accent-400 !bg-accent-400/20 !text-accent-400' : '')
+          }
+          onClick={() => setAiOn((on) => !on)}
+          title={aiAvailable ? '启用 AI 智能搜索' : '请先在 ai.* 中配置 API Key'}
+        >
+          <Sparkles size={12} /> {aiOn ? 'AI 已开启' : 'AI 智能搜索'}
+        </button>
+      </header>
+
+      {aiOn ? (
+        <form onSubmit={onAISubmit} className="flex gap-2">
+          <input
+            autoFocus
+            className="input-base"
+            placeholder='例如:“2010 年后的科幻电影” / “最近的动漫”'
+            value={q}
+            onChange={(e: ChangeEvent<HTMLInputElement>) => setQ(e.target.value)}
+          />
+          <button type="submit" className="neon-button">
+            搜索
+          </button>
+        </form>
+      ) : (
+        <input
+          autoFocus
+          className="input-base"
+          placeholder="按标题搜索…"
+          value={q}
+          onChange={(e: ChangeEvent<HTMLInputElement>) => setQ(e.target.value)}
+        />
+      )}
+
+      {intent && (
+        <div className="glass-panel !p-3 text-xs text-slate-300">
+          AI 解析:
+          <span className="ml-2 font-mono text-primary-400">{JSON.stringify(intent)}</span>
+        </div>
+      )}
+
       {loading && <p className="text-slate-500">搜索中…</p>}
       <div className="grid grid-cols-2 gap-4 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6">
         {items.map((m) => (