fix: resolve frontend build error and order refund bug, add member price filter

backend/app/services/content.go

@@ -38,6 +38,37 @@ func (s *content) List(ctx context.Context, filter *content_dto.ContentListFilte
 		q = q.Where(tbl.IsPinned.Is(*filter.IsPinned))
 	}
 
+	if filter.PriceType != nil && *filter.PriceType != "all" {
+		if *filter.PriceType == "member" {
+			q = q.Where(tbl.Visibility.Eq(consts.ContentVisibilityTenantOnly))
+		} else {
+			pTbl, pQ := models.ContentPriceQuery.QueryContext(ctx)
+
+			var shouldFilter bool
+			var prices []*models.ContentPrice
+
+			if *filter.PriceType == "free" {
+				shouldFilter = true
+				prices, _ = pQ.Where(pTbl.PriceAmount.Eq(0)).Select(pTbl.ContentID).Find()
+			} else if *filter.PriceType == "paid" {
+				shouldFilter = true
+				prices, _ = pQ.Where(pTbl.PriceAmount.Gt(0)).Select(pTbl.ContentID).Find()
+			}
+
+			if shouldFilter {
+				ids := make([]int64, len(prices))
+				for i, p := range prices {
+					ids[i] = p.ContentID
+				}
+				if len(ids) > 0 {
+					q = q.Where(tbl.ID.In(ids...))
+				} else {
+					q = q.Where(tbl.ID.Eq(-1))
+				}
+			}
+		}
+	}
+
 	// Sort
 	sort := "latest"
 	if filter.Sort != nil && *filter.Sort != "" {