feat: add YesPlayMusic-style home page with daily recs, FM, and user playlists

Add backend endpoints for daily recommended songs, personal FM, user
playlists, and playlist detail. Extend NeteaseProvider and MusicProvider
interface with getDailyRecommendSongs and getUserPlaylists. Rewrite Home
page with FM card, daily recommendations grid, and user playlists section.
Fix Playlist view to fetch detail and songs from separate endpoints.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/music/provider.ts

@@ -73,4 +73,6 @@ export interface MusicProvider {
   getCookie(): string;
   getAuthStatus(): Promise<AuthStatus>;
   getPersonalFm?(): Promise<Song[]>;
+  getDailyRecommendSongs?(): Promise<Song[]>;
+  getUserPlaylists?(): Promise<Playlist[]>;
 }