feat: v1.26.0 — Bulk Select, Song Info, Favorite Button, Recently Played

### Added
- Favorite/Star button in player bar (requested by @halfkey)
- Bulk multi-select for album tracklist and playlist detail (add to playlist, remove from playlist)
- Song Info modal via right-click context menu (metadata: format, bitrate, sample rate, bit depth, channels, file size, path, replay gain)
- Recently Played section on Home page
- "Show activity in Now Playing" opt-in toggle in Settings → Behavior

### Fixed
- Queue cover art not updating on track change (useCachedUrl/CachedImage reset on cacheKey change)
- FullscreenPlayer background flickering (FsBg preloads image before layer transition)
- Playlist card delete confirmation visual (size expansion + pulse animation)
- Gruvbox Light Soft: back button and badge invisible against light background

### Changed
- buildStreamUrl: removed unused suffix parameter

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

src/api/subsonic.ts

@@ -74,6 +74,7 @@ export interface SubsonicSong {
   contentType?: string;
   size?: number;
   samplingRate?: number;
+  bitDepth?: number;
   channelCount?: number;
   starred?: string;
   genre?: string;
@@ -325,7 +326,7 @@ export async function reportNowPlaying(id: string): Promise<void> {
 }
 
 // ─── Stream URL ───────────────────────────────────────────────
-export function buildStreamUrl(id: string, suffix?: string): string {
+export function buildStreamUrl(id: string): string {
   const { getBaseUrl, getActiveServer } = useAuthStore.getState();
   const server = getActiveServer();
   const baseUrl = getBaseUrl();
@@ -337,10 +338,6 @@ export function buildStreamUrl(id: string, suffix?: string): string {
     t: token, s: salt, v: '1.16.1', c: 'psysonic', f: 'json',
   });
   
-  if (suffix === 'opus') {
-    p.set('format', 'flac'); // Transcode OPUS to FLAC since Rust/Symphonia has no Opus decoder
-  }
-  
   return `${baseUrl}/rest/stream.view?${p.toString()}`;
 }