feat: 重构内容列表接口，使用过滤器结构体简化参数传递；更新相关服务和测试用例

backend/app/services/content.go

@@ -18,19 +18,19 @@ import (
 // @provider
 type content struct{}
 
-func (s *content) List(ctx context.Context, keyword, genre, tenantId, sort string, page int) (*requests.Pager, error) {
+func (s *content) List(ctx context.Context, filter *content_dto.ContentListFilter) (*requests.Pager, error) {
 	tbl, q := models.ContentQuery.QueryContext(ctx)
 
 	// Filters
 	q = q.Where(tbl.Status.Eq(consts.ContentStatusPublished))
-	if keyword != "" {
-		q = q.Where(tbl.Title.Like("%" + keyword + "%"))
+	if filter.Keyword != "" {
+		q = q.Where(tbl.Title.Like("%" + filter.Keyword + "%"))
 	}
-	if genre != "" {
-		q = q.Where(tbl.Genre.Eq(genre))
+	if filter.Genre != "" {
+		q = q.Where(tbl.Genre.Eq(filter.Genre))
 	}
-	if tenantId != "" {
-		tid := cast.ToInt64(tenantId)
+	if filter.TenantID != "" {
+		tid := cast.ToInt64(filter.TenantID)
 		q = q.Where(tbl.TenantID.Eq(tid))
 	}
 
@@ -38,7 +38,7 @@ func (s *content) List(ctx context.Context, keyword, genre, tenantId, sort strin
 	q = q.Preload(tbl.Author)
 
 	// Sort
-	switch sort {
+	switch filter.Sort {
 	case "hot":
 		q = q.Order(tbl.Views.Desc())
 	case "price_asc":
@@ -48,13 +48,14 @@ func (s *content) List(ctx context.Context, keyword, genre, tenantId, sort strin
 	}
 
 	// Pagination
-	p := requests.Pagination{Page: int64(page), Limit: 10}
+	// Use embedded pagination directly
+	filter.Pagination.Format()
 	total, err := q.Count()
 	if err != nil {
 		return nil, errorx.ErrDatabaseError.WithCause(err)
 	}
 
-	list, err := q.Offset(int(p.Offset())).Limit(int(p.Limit)).Find()
+	list, err := q.Offset(int(filter.Pagination.Offset())).Limit(int(filter.Pagination.Limit)).Find()
 	if err != nil {
 		return nil, errorx.ErrDatabaseError.WithCause(err)
 	}
@@ -66,12 +67,9 @@ func (s *content) List(ctx context.Context, keyword, genre, tenantId, sort strin
 	}
 
 	return &requests.Pager{
-		Pagination: requests.Pagination{
-			Page:  p.Page,
-			Limit: p.Limit,
-		},
-		Total: total,
-		Items: data,
+		Pagination: filter.Pagination,
+		Total:      total,
+		Items:      data,
 	}, nil
 }