chore(catalog): 清理 LEWAN_ 列表过滤与商品图 UUID 历史回退

商品列表不再过滤镜像 SKU；图片只按英文 SKU 解析，修正 DLC 预设文案。

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/internal/handler/merchant.go

@@ -57,9 +57,8 @@ func mapKeys(values map[string]struct{}) []string {
 func (h *MerchantHandler) ListProducts(c *gin.Context) {
 	page, size := pageParams(c)
 	list, total, err := h.merchantSvc.ListMerchantProductsWithOptions(middleware.GetMerchantID(c), page, size, service.ListMerchantProductsOptions{
-		Status:                strings.TrimSpace(c.Query("status")),
-		Keyword:               strings.TrimSpace(c.Query("keyword")),
-		ExcludeLegacyLewanSKU: true, // LEWAN_* 镜像已废弃，列表永不返回
+		Status:  strings.TrimSpace(c.Query("status")),
+		Keyword: strings.TrimSpace(c.Query("keyword")),
 	})
 	if err != nil {
 		if err.Error() == "无效的商品状态" {

backend/internal/service/merchant_product.go

@@ -84,10 +84,9 @@ func (s *MerchantService) CreateMerchantProduct(merchantID uint, in CreateMercha
 }
 
 type ListMerchantProductsOptions struct {
-	ActiveOnly            bool
-	ExcludeLegacyLewanSKU bool
-	Status                string // active / inactive；空表示不限（ActiveOnly 优先）
-	Keyword               string
+	ActiveOnly bool
+	Status     string // active / inactive；空表示不限（ActiveOnly 优先）
+	Keyword    string
 }
 
 func (s *MerchantService) ListMerchantProducts(merchantID uint, page, size int, activeOnly bool) ([]model.MerchantProduct, int64, error) {
@@ -96,11 +95,10 @@ func (s *MerchantService) ListMerchantProducts(merchantID uint, page, size int,
 	})
 }
 
-// ListMerchantProductsForClient 商户开放 API / 手工下单选品：排除 LEWAN_* 镜像，只返回英文主 sku。
+// ListMerchantProductsForClient 商户开放 API / 手工下单选品：只返回在售英文主 sku。
 func (s *MerchantService) ListMerchantProductsForClient(merchantID uint, page, size int) ([]model.MerchantProduct, int64, error) {
 	return s.ListMerchantProductsWithOptions(merchantID, page, size, ListMerchantProductsOptions{
-		ActiveOnly:            true,
-		ExcludeLegacyLewanSKU: true,
+		ActiveOnly: true,
 	})
 }
 
@@ -116,9 +114,6 @@ func (s *MerchantService) ListMerchantProductsWithOptions(merchantID uint, page,
 		}
 		tx = tx.Where("status = ?", status)
 	}
-	if opts.ExcludeLegacyLewanSKU {
-		tx = tx.Where("sku NOT ILIKE ?", "lewan_%")
-	}
 	if keyword := strings.TrimSpace(opts.Keyword); keyword != "" {
 		like := "%" + keyword + "%"
 		tx = tx.Where("(sku ILIKE ? OR display_name ILIKE ?)", like, like)