Add comprehensive backend services and API enhancements

- Complete Spotify integration with downloader and settings
- Advanced UX features and audio quality management
- Enhanced search capabilities and mobile offline support
- Music catalog browser and recap features
- Universal downloader and upload functionality
- Update tracking system with database models and migrations
- Comprehensive service layer architecture
- Enhanced lyrics API and streaming capabilities
- Extended application builder and startup configuration
- New logging infrastructure and services directory

src/swingmusic/api/plugins/lyrics.py

@@ -55,6 +55,10 @@ def search_lyrics(body: LyricsSearchBody):
 
     if lrc is not None:
         lyrics = Lyrics_class(lrc)
-        return {"trackhash": trackhash, "lyrics": lyrics.format_synced_lyrics()}, 200
+        if lyrics.is_synced:
+            formatted_lyrics = lyrics.format_synced_lyrics()
+        else:
+            formatted_lyrics = lyrics.format_unsynced_lyrics()
+        return {"trackhash": trackhash, "lyrics": formatted_lyrics, "synced": lyrics.is_synced}, 200
 
-    return {"trackhash": trackhash, "lyrics": lrc}, 200
+    return {"trackhash": trackhash, "lyrics": None, "synced": False}, 200