refactor(catalog): 废弃 LEWAN_ 镜像，统一英文 SKU 与积分价，商品图按 SKU 缓存

对外目录只保留英文主 sku；迁移硬删镜像并校准 1元=100积分；发货页/凭证优先使用 local {sku}.webp。

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

backend/internal/handler/open_v1.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 	"net/http"
 	"strconv"
+	"strings"
 
 	"affiliate_dash/internal/middleware"
 	"affiliate_dash/internal/model"
@@ -30,7 +31,7 @@ func (h *OpenV1Handler) ListProducts(c *gin.Context) {
 	page, _ := strconv.Atoi(c.DefaultQuery("page", "1"))
 	size, _ := strconv.Atoi(c.DefaultQuery("size", "20"))
 	openlog.Info(c, "list_products start page=%d size=%d", page, size)
-	list, total, err := h.merchantSvc.ListMerchantProducts(middleware.GetMerchantID(c), page, size, true)
+	list, total, err := h.merchantSvc.ListMerchantProductsForClient(middleware.GetMerchantID(c), page, size)
 	if err != nil {
 		openlog.Warn(c, "list_products fail err=%v", err)
 		response.ServerError(c, err.Error())
@@ -71,6 +72,11 @@ func (h *OpenV1Handler) CreateOrder(c *gin.Context) {
 		}
 		data = decoded
 	}
+	if service.IsLegacyLewanMirrorSKU(req.SKU) {
+		openlog.Warn(c, "create_order reject legacy lewan sku=%s", strings.TrimSpace(req.SKU))
+		response.BadRequest(c, "请使用英文主商品 sku 下单，勿使用 LEWAN_ 镜像 sku")
+		return
+	}
 	client := middleware.GetAPIClient(c)
 	openlog.Info(c, "create_order start client_order_no=%s sku=%s quantity=%d buyer=%s",
 		req.ClientOrderNo, req.SKU, req.Quantity, req.BuyerReference)