feat: 添加点赞和收藏功能，优化内容详情视图和评论交互

backend/app/services/content.go

@@ -88,7 +88,7 @@ func (s *content) List(ctx context.Context, filter *content_dto.ContentListFilte
 	// Convert to DTO
 	data := make([]content_dto.ContentItem, len(list))
 	for i, item := range list {
-		data[i] = s.toContentItemDTO(item, priceMap[item.ID])
+		data[i] = s.toContentItemDTO(item, priceMap[item.ID], false)
 	}
 
 	return &requests.Pager{
@@ -179,8 +179,18 @@ func (s *content) Get(ctx context.Context, userID int64, id string) (*content_dt
 		}
 	}
 
+	// Check if author is followed
+	authorIsFollowing := false
+	if userID > 0 {
+		exists, _ := models.TenantUserQuery.WithContext(ctx).
+			Where(models.TenantUserQuery.TenantID.Eq(item.TenantID),
+				models.TenantUserQuery.Role.Contains(string(consts.TenantUserRoleMember))).
+			Exists()
+		authorIsFollowing = exists
+	}
+
 	detail := &content_dto.ContentDetail{
-		ContentItem: s.toContentItemDTO(&item, price),
+		ContentItem: s.toContentItemDTO(&item, price, authorIsFollowing),
 		Description: item.Description,
 		Body:        item.Body,
 		MediaUrls:   s.toMediaURLs(accessibleAssets),
@@ -356,7 +366,7 @@ func (s *content) GetLibrary(ctx context.Context, userID int64) ([]user_dto.Cont
 
 	var data []user_dto.ContentItem
 	for _, item := range list {
-		dto := s.toContentItemDTO(item, 0)
+		dto := s.toContentItemDTO(item, 0, false)
 		dto.IsPurchased = true
 		data = append(data, dto)
 	}
@@ -441,16 +451,17 @@ func (s *content) ListTopics(ctx context.Context) ([]content_dto.Topic, error) {
 
 // Helpers
 
-func (s *content) toContentItemDTO(item *models.Content, price float64) content_dto.ContentItem {
+func (s *content) toContentItemDTO(item *models.Content, price float64, authorIsFollowing bool) content_dto.ContentItem {
 	dto := content_dto.ContentItem{
-		ID:        cast.ToString(item.ID),
-		Title:     item.Title,
-		Genre:     item.Genre,
-		AuthorID:  cast.ToString(item.UserID),
-		Views:     int(item.Views),
-		Likes:     int(item.Likes),
-		CreatedAt: item.CreatedAt.Format("2006-01-02"),
-		Price:     price,
+		ID:                cast.ToString(item.ID),
+		Title:             item.Title,
+		Genre:             item.Genre,
+		AuthorID:          cast.ToString(item.UserID),
+		Views:             int(item.Views),
+		Likes:             int(item.Likes),
+		CreatedAt:         item.CreatedAt.Format("2006-01-02"),
+		Price:             price,
+		AuthorIsFollowing: authorIsFollowing,
 	}
 	if item.Author != nil {
 		dto.AuthorName = item.Author.Nickname
@@ -623,7 +634,7 @@ func (s *content) getInteractList(ctx context.Context, userID int64, typ string)
 
 	var data []user_dto.ContentItem
 	for _, item := range list {
-		data = append(data, s.toContentItemDTO(item, 0))
+		data = append(data, s.toContentItemDTO(item, 0, false))
 	}
 	return data, nil
 }