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/__init__.py

@@ -21,6 +21,14 @@ from swingmusic.api import (
     auth,
     stream,
     backup_and_restore,
+    spotify,
+    spotify_settings,
+    enhanced_search,
+    universal_downloader,
+    music_catalog,
+    update_tracking,
+    audio_quality,
+    upload,
 )
 
 from swingmusic.api.plugins import lyrics as lyrics_plugin
@@ -28,7 +36,7 @@ from swingmusic.api.plugins import mixes as mixes_plugin
 
 __all__ = [
     "album", "artist", "collections", "colors", "favorites", "folder", "imgserver", "playlist", "search", "settings",
-    "lyrics", "plugins", "scrobble", "home", "getall", "auth", "stream", "backup_and_restore",
+    "lyrics", "plugins", "scrobble", "home", "getall", "auth", "stream", "backup_and_restore", "spotify", "spotify_settings", "enhanced_search", "universal_downloader", "music_catalog", "update_tracking", "audio_quality", "upload",
 
     "lyrics_plugin",
     "mixes_plugin"