feat: quality picker with track info, update dialog redesign, finalizing notification fix

- Quality picker now shows track name, artist, and cover
- Tap to expand long track titles (icon only shows when truncated)
- Ripple effect follows rounded corners including drag handle
- Update dialog redesigned with Material Expressive 3 style
- Fixed update notification stuck at 100% after download complete
- Ask before download now enabled by default
- Finalizing notification for multi-progress polling

lib/models/settings.dart

@@ -35,7 +35,7 @@ class AppSettings {
     this.folderOrganization = 'none', // Default: no folder organization
     this.convertLyricsToRomaji = false, // Default: keep original Japanese
     this.historyViewMode = 'grid', // Default: grid view
-    this.askQualityBeforeDownload = false, // Default: use preset quality
+    this.askQualityBeforeDownload = true, // Default: ask quality before download
   });
 
   AppSettings copyWith({