feat(player): 切集刷新互动计数统计

lib/core/data/services/favorite_controller.dart

@@ -32,6 +32,17 @@ class FavoriteController extends ChangeNotifier {
 
   bool isSaved(String dramaId) => _saved.contains(dramaId);
 
+  /// 用统计快照校准收藏状态；已有列表卡片结构不因一次状态同步而改动。
+  void applyServerState(String dramaId, {required bool saved}) {
+    final changed = _saved.contains(dramaId) != saved;
+    if (saved) {
+      _saved.add(dramaId);
+    } else {
+      _saved.remove(dramaId);
+    }
+    if (changed) notify();
+  }
+
   void notify() {
     if (!_disposed) notifyListeners();
   }

lib/core/data/services/interaction_controller.dart

@@ -40,6 +40,24 @@ class InteractionController extends ChangeNotifier {
   /// 该集服务端最新点赞数。
   int? episodeLikeCount(String episodeId) => _episodeLikeCounts[episodeId];
 
+  /// 用轻量统计快照校准当前用户的分集点赞状态与计数。
+  void applyEpisodeStats(
+    String episodeId, {
+    required bool liked,
+    required int likeCount,
+  }) {
+    final changed =
+        _likedEpisodeIds.contains(episodeId) != liked ||
+        _episodeLikeCounts[episodeId] != likeCount;
+    if (liked) {
+      _likedEpisodeIds.add(episodeId);
+    } else {
+      _likedEpisodeIds.remove(episodeId);
+    }
+    _episodeLikeCounts[episodeId] = likeCount;
+    if (changed) _notify();
+  }
+
   /// 乐观切换剧集点赞，失败时回滚并以服务端返回状态校准。
   Future<OperationResult<LikeToggleResult>> toggleDramaLike(String dramaId) =>
       _toggleLike(