feat: 新增音乐播放模块

- 新增 Music 数据模型 + 迁移（title/subtitle/audioFile）
- 后端：公共 /api/music 查询接口 + 管理端 CRUD
  （音频上传专用 multer，限制 20MB）
- 移动端 /music/:id 播放页：
  - 金色印章式唱片 + 旋转虚线环 + 三重金色涟漪
  - preload=auto + HTTP Range 流式加载
  - 浏览器禁止 autoplay 时显示「轻点聆听」overlay
  - 自定义进度条与时间显示
- Admin：新增音乐管理三页（列表/表单/二维码）与侧栏入口
- 导入示例音乐：朝天宫之歌
- Dockerfile + entrypoint 增加 music 资产回灌

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

packages/web/src/App.tsx

@@ -3,6 +3,7 @@ import { AuthProvider } from "./lib/auth";
 import LandingPage from "./pages/LandingPage";
 import AlbumPage from "./pages/AlbumPage";
 import ArticlePage from "./pages/ArticlePage";
+import MusicPage from "./pages/MusicPage";
 import AdminLogin from "./admin/AdminLogin";
 import AdminGuard from "./admin/AdminGuard";
 import AdminLayout from "./admin/AdminLayout";
@@ -12,6 +13,9 @@ import StampQRCode from "./admin/StampQRCode";
 import ArticleList from "./admin/ArticleList";
 import ArticleForm from "./admin/ArticleForm";
 import ArticleQRCode from "./admin/ArticleQRCode";
+import MusicList from "./admin/MusicList";
+import MusicForm from "./admin/MusicForm";
+import MusicQRCode from "./admin/MusicQRCode";
 import RuleList from "./admin/RuleList";
 import RuleForm from "./admin/RuleForm";
 import RedemptionLog from "./admin/RedemptionLog";
@@ -30,6 +34,7 @@ export default function App() {
         <Route path="/album" element={<AlbumPage />} />
         <Route path="/collect/:stampId" element={<CollectRedirect />} />
         <Route path="/article/:id" element={<ArticlePage />} />
+        <Route path="/music/:id" element={<MusicPage />} />
 
         {/* Admin panel */}
         <Route path="/admin" element={<AdminLogin />} />
@@ -43,6 +48,10 @@ export default function App() {
             <Route path="/admin/articles/new" element={<ArticleForm />} />
             <Route path="/admin/articles/:id/edit" element={<ArticleForm />} />
             <Route path="/admin/articles/:id/qrcode" element={<ArticleQRCode />} />
+            <Route path="/admin/music" element={<MusicList />} />
+            <Route path="/admin/music/new" element={<MusicForm />} />
+            <Route path="/admin/music/:id/edit" element={<MusicForm />} />
+            <Route path="/admin/music/:id/qrcode" element={<MusicQRCode />} />
             <Route path="/admin/rules" element={<RuleList />} />
             <Route path="/admin/rules/new" element={<RuleForm />} />
             <Route path="/admin/rules/:id/edit" element={<RuleForm />} />