Refactor backend APIs to RESTful route patterns.

Align group and conversation handlers/services with path-based endpoints, and unify response/service error handling for related modules.

Made-with: Cursor

internal/service/post_service.go

@@ -411,6 +411,31 @@ func (s *PostService) IsFavorited(ctx context.Context, postID, userID string) bo
 	return s.postRepo.IsFavorited(postID, userID)
 }
 
+// GetPostInteractionStatus 批量获取帖子的交互状态（点赞、收藏）
+func (s *PostService) GetPostInteractionStatus(ctx context.Context, postIDs []string, userID string) (map[string]bool, map[string]bool, error) {
+	isLikedMap := make(map[string]bool)
+	isFavoritedMap := make(map[string]bool)
+
+	if userID == "" || len(postIDs) == 0 {
+		return isLikedMap, isFavoritedMap, nil
+	}
+
+	for _, postID := range postIDs {
+		isLikedMap[postID] = s.postRepo.IsLiked(postID, userID)
+		isFavoritedMap[postID] = s.postRepo.IsFavorited(postID, userID)
+	}
+
+	return isLikedMap, isFavoritedMap, nil
+}
+
+// GetPostInteractionStatusSingle 获取单个帖子的交互状态
+func (s *PostService) GetPostInteractionStatusSingle(ctx context.Context, postID, userID string) (isLiked, isFavorited bool) {
+	if userID == "" {
+		return false, false
+	}
+	return s.postRepo.IsLiked(postID, userID), s.postRepo.IsFavorited(postID, userID)
+}
+
 // IncrementViews 增加帖子观看量并同步到Gorse
 func (s *PostService) IncrementViews(ctx context.Context, postID, userID string) error {
 	if err := s.postRepo.IncrementViews(postID); err != nil {