商户管理优化, 商户只能上架下架, 管理员可以编辑

backend/internal/service/fulfillment_test.go

@@ -723,6 +723,32 @@ func TestCreateOrderRejectsInsufficientBalance(t *testing.T) {
 	}
 }
 
+func TestCreateOrderRejectsInactiveProduct(t *testing.T) {
+	db := newServiceTestDB(t)
+	merchantID, product := seedFulfillmentMerchant(t, db, "merchant-inactive-product", 5000, 1, 100)
+	svc := NewFulfillmentService(db, nil)
+
+	// 商户下架商品后：开放接口下单与商户测试订单都应被拒绝
+	if err := db.Model(&model.MerchantProduct{}).Where("id = ?", product.ID).Update("status", model.ProductStatusInactive).Error; err != nil {
+		t.Fatalf("deactivate product: %v", err)
+	}
+	if _, err := svc.CreateOrder(CreateFulfillmentOrderInput{
+		MerchantID:    merchantID,
+		APIClientID:   16,
+		ClientOrderNo: "client-inactive-product",
+		SKU:           product.SKU,
+	}); err == nil || !strings.Contains(err.Error(), "已下架") {
+		t.Fatalf("inactive product should reject order, got %v", err)
+	}
+	if _, err := svc.CreateTestOrder(CreateTestOrderInput{
+		MerchantID:  merchantID,
+		ActorUserID: 99,
+		SKU:         product.SKU,
+	}); err == nil || !strings.Contains(err.Error(), "已下架") {
+		t.Fatalf("inactive product should reject test order, got %v", err)
+	}
+}
+
 func TestCreateTestOrderCreatesFulfillableOrderWithoutBilling(t *testing.T) {
 	db := newServiceTestDB(t)
 	merchantID, product := seedFulfillmentMerchant(t, db, "merchant-test-order", 0, 0, 100)