fix(flutter): feed 清屏保留顶栏并寻址恢复播放

lib/pages/player/player_logic.dart

@@ -578,7 +578,11 @@ class PlayerLogic extends ChangeNotifier {
       await session.playbackSettled;
       if (scrubbingPlayer != player || session.active != player) return;
       await player.controller.seekTo(position);
-      if (session.active == player) await saveCurrentProgress();
+      if (session.active == player) {
+        // 暂停时拖动进度后直接恢复播放，避免画面停在旧位置。
+        resumeAfterSeek();
+        await saveCurrentProgress();
+      }
     } catch (_) {
       if (context.mounted && session.active == player) {
         final l10n = AppLocalizations.of(context)!;
@@ -591,6 +595,12 @@ class PlayerLogic extends ChangeNotifier {
     }
   }
 
+  /// 拖动进度落点后恢复播放；暂停态拖动不应停留在暂停。
+  @visibleForTesting
+  void resumeAfterSeek() {
+    if (!session.userWantsPlay) session.setUserWantsPlay(true);
+  }
+
   Future<void> leave(BuildContext context) async {
     await saveCurrentProgress();
     if (context.mounted) Navigator.of(context).pop();