feat(player): 未就绪改由进度条展示加载态

lib/pages/player/widgets/home_feed_overlay.dart

@@ -10,6 +10,7 @@ import '../../../core/formatting/localized_content.dart';
 import '../../../core/theme/app_colors.dart';
 import '../../../l10n/app_localizations.dart';
 import 'interaction_rail.dart';
+import 'loading_progress_track.dart';
 
 part 'home_feed_overlay_parts.dart';