feat(app): 展示真实点赞与评论计数

lib/core/data/services/comment_controller.dart

@@ -36,12 +36,17 @@ class CommentController extends ChangeNotifier {
   bool loadingMore = false;
   bool submitting = false;
   bool hasMore = false;
+  bool _loaded = false;
   String? nextCursor;
   String? error;
 
   /// 当前已加载的顶层评论。
   List<DramaComment> get comments => List.unmodifiable(_comments);
 
+  /// 全部分页加载完后返回精确的顶层评论数，否则返回 null。
+  int? get exactCount =>
+      _loaded && !loading && !loadingMore && !hasMore ? _comments.length : null;
+
   /// 某一楼层已加载的回复。
   List<DramaComment> repliesFor(String rootId) =>
       List.unmodifiable(_replies[rootId] ?? const []);
@@ -77,6 +82,7 @@ class CommentController extends ChangeNotifier {
         ..addAll(page.comments);
       nextCursor = page.nextCursor;
       hasMore = page.hasMore;
+      _loaded = true;
     } catch (failure) {
       error = _errorMessage(failure) ?? 'commentsLoadFailed';
     } finally {

lib/core/data/services/interaction_controller.dart

@@ -8,14 +8,15 @@ import '../repositories/interaction_repository.dart';
 
 /// 剧集点赞与举报的会话状态控制器。
 ///
-/// 剧集契约暂未下发初始点赞状态与计数，本批只维护当前会话内的 liked 状态，
-/// 不展示数字，也不伪造初始值。
+/// 剧集契约暂未下发初始点赞状态与计数，因此仅在点赞接口成功返回后展示
+/// 服务端最新计数，不伪造初始值。
 class InteractionController extends ChangeNotifier {
   InteractionController(this._repository);
 
   final InteractionRepository _repository;
   final Set<String> _likedDramaIds = {};
   final Set<String> _busyDramaIds = {};
+  final Map<String, int> _likeCounts = {};
   bool _disposed = false;
 
   /// 当前会话内该剧是否已点赞。
@@ -24,6 +25,9 @@ class InteractionController extends ChangeNotifier {
   /// 点赞请求是否进行中，用于防连点。
   bool isBusy(String dramaId) => _busyDramaIds.contains(dramaId);
 
+  /// 服务端最新点赞数，仅在点赞接口成功返回后可用。
+  int? likeCount(String dramaId) => _likeCounts[dramaId];
+
   /// 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,
@@ -49,6 +53,7 @@ class InteractionController extends ChangeNotifier {
       } else {
         _likedDramaIds.remove(dramaId);
       }
+      _likeCounts[dramaId] = result.count;
       return OperationResult.success(result);
     } catch (failure) {
       if (wasLiked) {
@@ -86,9 +91,14 @@ class InteractionController extends ChangeNotifier {
 
   /// 登录账号变化时清理会话内状态，避免跨账号串联。
   void clear() {
-    if (_likedDramaIds.isEmpty && _busyDramaIds.isEmpty) return;
+    if (_likedDramaIds.isEmpty &&
+        _busyDramaIds.isEmpty &&
+        _likeCounts.isEmpty) {
+      return;
+    }
     _likedDramaIds.clear();
     _busyDramaIds.clear();
+    _likeCounts.clear();
     _notify();
   }
 

lib/pages/player/player_view.dart

@@ -337,6 +337,7 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
                   drama: drama,
                   episode: episode,
                   liked: interactions.isLiked(drama.id),
+                  likeCount: interactions.likeCount(drama.id),
                   saved: context.watch<FavoriteController>().isSaved(drama.id),
                   onLike: () async {
                     if (await ensureSignedIn(context)) {
@@ -388,6 +389,7 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
             episode: episode,
             controller: ready ? videoPort!.controller : null,
             liked: interactions.isLiked(drama.id),
+            likeCount: interactions.likeCount(drama.id),
             // 收藏以服务端为准（FavoriteController 由 app 注入，登录后自动加载）
             saved: context.watch<FavoriteController>().isSaved(drama.id),
             onBack: widget.embedded
@@ -506,9 +508,7 @@ class _PlayerPageState extends State<PlayerPage> with WidgetsBindingObserver {
     final l10n = AppLocalizations.of(context)!;
     ScaffoldMessenger.of(context).showSnackBar(
       SnackBar(
-        content: Text(
-          errorText(l10n, logic.unlockError, l10n.unlockFailed),
-        ),
+        content: Text(errorText(l10n, logic.unlockError, l10n.unlockFailed)),
       ),
     );
   }
@@ -688,6 +688,7 @@ class _PlaybackOverlay extends StatefulWidget {
     required this.episode,
     required this.controller,
     required this.liked,
+    this.likeCount,
     required this.saved,
     required this.playing,
     required this.playbackSpeed,
@@ -714,6 +715,7 @@ class _PlaybackOverlay extends StatefulWidget {
   final Episode episode;
   final VideoPlayerController? controller;
   final bool liked;
+  final int? likeCount;
   final bool saved;
   final bool playing;
   final double playbackSpeed;
@@ -985,6 +987,12 @@ class _PlaybackOverlayState extends State<_PlaybackOverlay> {
                 color: widget.liked ? AppColors.blue : AppColors.muted,
               ),
               title: Text(widget.l10n.like),
+              trailing: widget.likeCount == null
+                  ? null
+                  : Text(
+                      '${widget.likeCount}',
+                      key: const Key('player-more-like-count'),
+                    ),
               onTap: () {
                 Navigator.pop(sheetContext);
                 widget.onLike();

lib/pages/player/widgets/drama_comments_sheet.dart

@@ -178,11 +178,13 @@ class _DramaCommentsSheetState extends State<DramaCommentsSheet> {
 
   Widget _content(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
+    final count = _controller.exactCount;
     return Column(
       crossAxisAlignment: CrossAxisAlignment.start,
       children: [
         Text(
-          l10n.comments,
+          count == null ? l10n.comments : '${l10n.comments} · $count',
+          key: count == null ? null : const Key('comment-count-label'),
           style: const TextStyle(
             color: AppColors.cream,
             fontSize: 18,

lib/pages/player/widgets/home_feed_overlay.dart

@@ -19,6 +19,7 @@ class HomeFeedOverlay extends StatelessWidget {
     required this.drama,
     required this.episode,
     required this.liked,
+    this.likeCount,
     required this.saved,
     required this.onLike,
     required this.onSave,
@@ -35,6 +36,7 @@ class HomeFeedOverlay extends StatelessWidget {
   final Drama drama;
   final Episode episode;
   final bool liked;
+  final int? likeCount;
   final bool saved;
   final VoidCallback onLike;
   final VoidCallback onSave;
@@ -123,7 +125,8 @@ class HomeFeedOverlay extends StatelessWidget {
         _RailItem(
           key: const Key('rail-like'),
           icon: liked ? Icons.favorite_rounded : Icons.favorite_border_rounded,
-          label: l10n.like,
+          label: likeCount?.toString() ?? l10n.like,
+          countKey: likeCount == null ? null : const Key('rail-like-count'),
           selected: liked,
           onTap: onLike,
         ),
@@ -375,12 +378,14 @@ class _RailItem extends StatelessWidget {
     required this.label,
     required this.onTap,
     this.selected = false,
+    this.countKey,
   });
 
   final IconData icon;
   final String label;
   final VoidCallback onTap;
   final bool selected;
+  final Key? countKey;
 
   @override
   Widget build(BuildContext context) {
@@ -404,6 +409,7 @@ class _RailItem extends StatelessWidget {
                 const SizedBox(height: 2),
                 Text(
                   label,
+                  key: countKey,
                   maxLines: 1,
                   overflow: TextOverflow.ellipsis,
                   style: const TextStyle(

test/comment/comment_controller_test.dart

@@ -42,6 +42,27 @@ void main() {
     model.dispose();
   });
 
+  test('should_expose_exact_count_only_when_last_page_is_loaded', () async {
+    final repository = FakeCommentRepository(
+      pages: [
+        CommentPage(
+          comments: [commentFixture(id: '2')],
+          nextCursor: '2',
+          hasMore: true,
+        ),
+        CommentPage(comments: [commentFixture(id: '1')]),
+      ],
+    );
+    final model = controller(repository);
+
+    await model.load();
+    expect(model.exactCount, isNull);
+
+    await model.loadMore();
+    expect(model.exactCount, 2);
+    model.dispose();
+  });
+
   test('should_use_server_content_and_pending_status_when_review_is_returned', () async {
     final repository = FakeCommentRepository(
       publishResult: commentFixture(

test/comment/drama_comments_sheet_test.dart

@@ -62,11 +62,13 @@ void main() {
     await _pumpSheet(tester, repository: repository);
     expect(find.text('Great episode'), findsOneWidget);
     expect(find.byKey(const Key('comment-list-load-more')), findsOneWidget);
+    expect(find.byKey(const Key('comment-count-label')), findsNothing);
 
     await tester.tap(find.byKey(const Key('comment-list-load-more')));
     await tester.pumpAndSettle();
 
     expect(find.text('Second page'), findsOneWidget);
+    expect(find.text('Comments · 2'), findsOneWidget);
     expect(repository.pageCalls.last.cursor, '10');
   });
 

test/home/home_preview_layout_test.dart

@@ -147,6 +147,48 @@ void main() {
       'Fallback Drama',
     );
   });
+
+  testWidgets('should_show_server_like_count_when_count_is_available', (
+    tester,
+  ) async {
+    await tester.pumpWidget(
+      MaterialApp(
+        theme: AppTheme.dark(),
+        locale: const Locale('en'),
+        supportedLocales: AppLocalizations.supportedLocales,
+        localizationsDelegates: AppLocalizations.localizationsDelegates,
+        home: Builder(
+          builder: (context) => Scaffold(
+            body: HomeFeedOverlay(
+              l10n: AppLocalizations.of(context)!,
+              drama: _drama,
+              episode: const Episode(
+                id: 'count-episode',
+                number: 1,
+                title: 'Count Episode',
+                isFree: true,
+              ),
+              liked: true,
+              likeCount: 128,
+              saved: false,
+              onLike: () {},
+              onSave: () {},
+              onComments: () {},
+              onShare: () {},
+              onEpisodes: () {},
+              onDownload: () {},
+              onClear: () {},
+              onSearch: () {},
+            ),
+          ),
+        ),
+      ),
+    );
+    await tester.pumpAndSettle();
+
+    expect(find.byKey(const Key('rail-like-count')), findsOneWidget);
+    expect(find.text('128'), findsOneWidget);
+  });
 }
 
 const _drama = Drama(

test/interaction/interaction_controller_test.dart

@@ -26,6 +26,23 @@ void main() {
 
     expect(result.isSuccess, isTrue);
     expect(controller.isLiked('5'), isFalse);
+    expect(controller.likeCount('5'), 0);
+    controller.dispose();
+  });
+
+  test('should_expose_latest_server_count_when_two_toggles_succeed', () async {
+    final repository = FakeInteractionRepository(
+      nextLikeResult: const LikeToggleResult(liked: true, count: 12),
+    );
+    final controller = InteractionController(repository);
+
+    await controller.toggleDramaLike('5');
+    expect(controller.likeCount('5'), 12);
+
+    repository.nextLikeResult = const LikeToggleResult(liked: false, count: 11);
+    await controller.toggleDramaLike('5');
+
+    expect(controller.likeCount('5'), 11);
     controller.dispose();
   });
 
@@ -55,6 +72,7 @@ void main() {
     controller.clear();
 
     expect(controller.isLiked('5'), isFalse);
+    expect(controller.likeCount('5'), isNull);
     controller.dispose();
   });
 }