fix(player): 收敛播放页入口加载态

lib/pages/player/widgets/player_overlay.dart

@@ -304,6 +304,7 @@ class PlayerPlaybackOverlay extends StatelessWidget {
         thumbnailsUrl: data.episode.thumbnailsUrl,
         episodeId: data.episode.id,
         inactiveTrackColor: AppColors.inactiveTrack,
+        fallbackDuration: Duration(seconds: data.episode.durationSec),
         onScrubStart: actions.onScrubStart,
         onScrubEnd: actions.onScrubEnd,
         onSeek: actions.onSeek,