feat(player): 切集刷新互动计数统计

lib/core/data/models/drama.dart

@@ -60,6 +60,20 @@ class Episode {
     posterUrl: posterUrl ?? this.posterUrl,
   );
 
+  Episode withStats({int? likeCount, int? commentCount}) => Episode(
+    id: id,
+    number: number,
+    title: title,
+    isFree: isFree,
+    videoUrl: videoUrl,
+    durationSec: durationSec,
+    locked: locked,
+    likeCount: likeCount ?? this.likeCount,
+    commentCount: commentCount ?? this.commentCount,
+    thumbnailsUrl: thumbnailsUrl,
+    posterUrl: posterUrl,
+  );
+
   factory Episode.fromJson(Map<String, dynamic> json) {
     return Episode(
       id: (json['id'] ?? '').toString(),

lib/core/data/models/episode_stats.dart

@@ -0,0 +1,55 @@
+// Author: fruit.com.cn
+
+import 'json_numbers.dart';
+
+/// 播放页轻量互动计数快照，不包含播放地址或票据信息。
+class EpisodeStats {
+  const EpisodeStats({
+    required this.episodeId,
+    required this.dramaId,
+    required this.likeCount,
+    required this.commentCount,
+    required this.favoriteCount,
+    required this.liked,
+    required this.favorited,
+  });
+
+  final String episodeId;
+  final String dramaId;
+  final int likeCount;
+  final int commentCount;
+  final int favoriteCount;
+  final bool liked;
+  final bool favorited;
+
+  EpisodeStats copyWith({
+    String? dramaId,
+    int? likeCount,
+    int? commentCount,
+    int? favoriteCount,
+    bool? liked,
+    bool? favorited,
+  }) {
+    return EpisodeStats(
+      episodeId: episodeId,
+      dramaId: dramaId ?? this.dramaId,
+      likeCount: likeCount ?? this.likeCount,
+      commentCount: commentCount ?? this.commentCount,
+      favoriteCount: favoriteCount ?? this.favoriteCount,
+      liked: liked ?? this.liked,
+      favorited: favorited ?? this.favorited,
+    );
+  }
+
+  factory EpisodeStats.fromJson(Map<String, dynamic> json) {
+    return EpisodeStats(
+      episodeId: jsonToId(json['episodeId']),
+      dramaId: jsonToId(json['dramaId']),
+      likeCount: jsonToInt(json['likeCount']),
+      commentCount: jsonToInt(json['commentCount']),
+      favoriteCount: jsonToInt(json['favoriteCount']),
+      liked: json['liked'] == true,
+      favorited: json['favorited'] == true,
+    );
+  }
+}

lib/core/data/remote/playback_api.dart

@@ -1,5 +1,6 @@
 // Author: fruit.com.cn
 
+import '../models/episode_stats.dart';
 import '../models/play_ticket.dart';
 import 'api_client.dart';
 
@@ -17,4 +18,11 @@ class PlaybackApi {
     if (data is Map<String, dynamic>) return PlayTicket.fromJson(data);
     throw const ApiException(-1, '返回数据格式异常');
   }
+
+  /// 轻量刷新互动计数：不签发地址，也不占用播放票据缓存。
+  Future<EpisodeStats> episodeStats(String episodeId) async {
+    final data = await _client.get('/app/episodes/$episodeId/stats');
+    if (data is Map<String, dynamic>) return EpisodeStats.fromJson(data);
+    throw const ApiException(-1, '返回数据格式异常');
+  }
 }

lib/core/data/repositories/playback_repository.dart

@@ -1,5 +1,6 @@
 // Author: fruit.com.cn
 
+import '../models/episode_stats.dart';
 import '../models/play_ticket.dart';
 import '../remote/playback_api.dart';
 
@@ -10,6 +11,9 @@ import '../remote/playback_api.dart';
 abstract interface class PlaybackRepository {
   Future<PlayTicket> ticketFor(String episodeId, {bool forceRefresh = false});
 
+  /// 读取互动计数快照；与 [ticketFor] 分离，避免为了刷新计数重新签发地址。
+  Future<EpisodeStats> episodeStats(String episodeId);
+
   /// 当前缓存的票据是否还在有效期内（用于"回前台发现过期就重新取"）。
   bool isFresh(String episodeId);
 }
@@ -42,6 +46,10 @@ class HttpPlaybackRepository implements PlaybackRepository {
     return ticket;
   }
 
+  @override
+  Future<EpisodeStats> episodeStats(String episodeId) =>
+      _api.episodeStats(episodeId);
+
   @override
   bool isFresh(String episodeId) {
     final cached = _cache[episodeId];
@@ -65,11 +73,22 @@ class _CachedTicket {
 
 /// 测试与离线场景用：按集返回固定票据，并记录被请求过几次。
 class FakePlaybackRepository implements PlaybackRepository {
-  FakePlaybackRepository({this.ticket, this.error, this.fresh = true});
+  FakePlaybackRepository({
+    this.ticket,
+    this.error,
+    this.fresh = true,
+    this.stats,
+    this.statsError,
+    Map<String, EpisodeStats>? statsByEpisode,
+  }) : statsByEpisode = statsByEpisode ?? {};
 
   PlayTicket? ticket;
   Object? error;
+  EpisodeStats? stats;
+  Object? statsError;
+  final Map<String, EpisodeStats> statsByEpisode;
   final List<String> requests = [];
+  final List<String> statsRequests = [];
   final List<bool> forced = [];
 
   /// 模拟"票据是否还有效"：置 false 可验证回前台会重新取。
@@ -95,4 +114,13 @@ class FakePlaybackRepository implements PlaybackRepository {
           qualities: const ['AUTO', '720P', '1080P'],
         );
   }
+
+  @override
+  Future<EpisodeStats> episodeStats(String episodeId) async {
+    statsRequests.add(episodeId);
+    if (statsError != null) throw statsError!;
+    final value = statsByEpisode[episodeId] ?? stats;
+    if (value != null) return value;
+    throw StateError('episode stats not configured for $episodeId');
+  }
 }

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(