feat: v1.34.1 — fullscreen lyrics overlay, FsArt crossfade, lyrics toggle, contributor updates

- FullscreenPlayer: synced lyrics overlay (5-line rail, mask fade, click-to-seek)
- FullscreenPlayer: FsArt crossfade component with onLoad pattern, 300px art, next-track pre-fetch
- FullscreenPlayer: MicVocal lyrics toggle button next to heart (persisted in authStore)
- FullscreenPlayer: idle system — only close button auto-hides, cluster+seekbar always visible
- LyricsPane: refactored to use shared useLyrics hook (no double-fetch with FS overlay)
- authStore: showFullscreenLyrics field (default true)
- i18n: fsLyricsToggle key added to all 7 locales; ru2.ts removed (merged into ru.ts)
- Settings: Contributors updated (nisrael, cucadmuh, kilyabin); logout moved to Server tab as btn-danger
- theme.css: btn-danger style added

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

src/locales/en.ts

@@ -345,7 +345,6 @@ export const enTranslation = {
     languageZh: 'Chinese',
     languageNb: 'Norwegian',
     languageRu: 'Russian',
-    languageRu2: 'Russian 2',
     font: 'Font',
     theme: 'Theme',
     appearance: 'Appearance',
@@ -426,6 +425,8 @@ export const enTranslation = {
     discordRichPresenceDesc: 'Show the currently playing track on your Discord profile. Requires Discord to be running.',
     nowPlayingEnabled: 'Show in Now Playing',
     nowPlayingEnabledDesc: 'Broadcast your currently playing track to the server\'s live listener view. Disable to stop sending playback data.',
+    lyricsServerFirst: 'Prefer server lyrics',
+    lyricsServerFirstDesc: 'Check server-provided lyrics (embedded tags, sidecar files) before querying LRCLIB. Disable to use LRCLIB first.',
     downloadsTitle: 'ZIP Export & Archiving',
     downloadsFolderDesc: 'Destination folder for albums you download as a ZIP file to your computer.',
     downloadsDefault: 'Default Downloads Folder',
@@ -689,8 +690,11 @@ export const enTranslation = {
     volume: 'Volume',
     toggleQueue: 'Toggle Queue',
     lyrics: 'Lyrics',
+    fsLyricsToggle: 'Lyrics in fullscreen',
     lyricsLoading: 'Loading lyrics…',
     lyricsNotFound: 'No lyrics found for this track',
+    lyricsSourceServer: 'Source: Server',
+    lyricsSourceLrclib: 'Source: LRCLIB',
   },
   songInfo: {
     title: 'Song Info',