fix(interaction): 收藏计数同步维护并新增评论数接口

fruitshorts-module-playback/src/main/java/com/fruitshorts/playback/service/FavoriteService.java

@@ -15,7 +15,7 @@ import java.time.LocalDateTime;
 import java.util.ArrayList;
 import java.util.List;
 
-/** 收藏：切换、列表、批量删除。计数走异步聚合，不在事务里更新统计列。 */
+/** 收藏：切换、列表、批量删除；收藏数在同一事务内同步维护。 */
 @Service
 @RequiredArgsConstructor
 public class FavoriteService {
@@ -33,7 +33,10 @@ public class FavoriteService {
                 .last("limit 1"));
         if (existing != null) {
             // 必须物理删除：唯一索引 (user_id, drama_id) 会挡住"取消后再收藏"
-            favoriteMapper.physicalDelete(userId, dramaId);
+            int removed = favoriteMapper.physicalDelete(userId, dramaId);
+            if (removed > 0) {
+                dramaService.adjustFavoriteCount(dramaId, -1);
+            }
             return false;
         }
         UserFavorite favorite = new UserFavorite();
@@ -41,6 +44,7 @@ public class FavoriteService {
         favorite.setDramaId(dramaId);
         favorite.setSort(0);
         favoriteMapper.insert(favorite);
+        dramaService.adjustFavoriteCount(dramaId, 1);
         return true;
     }
 
@@ -79,7 +83,10 @@ public class FavoriteService {
 
     @Transactional(rollbackFor = Exception.class)
     public void remove(Long userId, Long dramaId) {
-        favoriteMapper.physicalDelete(userId, dramaId);
+        int removed = favoriteMapper.physicalDelete(userId, dramaId);
+        if (removed > 0) {
+            dramaService.adjustFavoriteCount(dramaId, -1);
+        }
     }
 
     @Transactional(rollbackFor = Exception.class)
@@ -87,12 +94,18 @@ public class FavoriteService {
         if (dramaIds == null || dramaIds.isEmpty()) {
             return;
         }
-        favoriteMapper.delete(Wrappers.<UserFavorite>lambdaQuery()
-                .eq(UserFavorite::getUserId, userId)
-                .in(UserFavorite::getDramaId, dramaIds));
+        for (Long dramaId : dramaIds) {
+            if (dramaId == null) {
+                continue;
+            }
+            int removed = favoriteMapper.physicalDelete(userId, dramaId);
+            if (removed > 0) {
+                dramaService.adjustFavoriteCount(dramaId, -1);
+            }
+        }
     }
 
-    /** 供收藏数聚合任务调用，标记最近变更时间。 */
+    /** 查询用户对某部剧最近一次收藏时间。 */
     public LocalDateTime lastChangedAt(Long userId, Long dramaId) {
         UserFavorite favorite = favoriteMapper.selectOne(Wrappers.<UserFavorite>lambdaQuery()
                 .eq(UserFavorite::getUserId, userId)