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/pages/Playlists.tsx

@@ -1,6 +1,6 @@
 import React, { useEffect, useState, useRef } from 'react';
 import { useNavigate } from 'react-router-dom';
-import { ListMusic, Play, Plus, X } from 'lucide-react';
+import { ListMusic, Play, Plus, Trash2, X } from 'lucide-react';
 import { getPlaylists, createPlaylist, deletePlaylist, SubsonicPlaylist, getPlaylist, buildCoverArtUrl, coverArtCacheKey } from '../api/subsonic';
 import { usePlayerStore, songToTrack } from '../store/playerStore';
 import { usePlaylistStore } from '../store/playlistStore';
@@ -172,7 +172,7 @@ export default function Playlists() {
                   data-tooltip={deleteConfirmId === pl.id ? t('playlists.confirmDelete') : t('playlists.deletePlaylist')}
                   data-tooltip-pos="bottom"
                 >
-                  <X size={12} />
+                  {deleteConfirmId === pl.id ? <Trash2 size={12} /> : <X size={12} />}
                 </button>
               </div>