fix: scope coupons by tenant

backend/app/services/user_test.go

@@ -171,15 +171,16 @@ func (s *UserTestSuite) Test_GetNotifications() {
 
 		// Mock notifications
 		_ = models.Q.Notification.WithContext(ctx).Create(&models.Notification{
-			UserID:  userID,
-			Type:    "system",
-			Title:   "Welcome",
-			Content: "Hello World",
-			IsRead:  false,
+			TenantID: tenantID,
+			UserID:   userID,
+			Type:     "system",
+			Title:    "Welcome",
+			Content:  "Hello World",
+			IsRead:   false,
 		})
 
 		Convey("should return notifications", func() {
-			list, err := User.GetNotifications(ctx, userID, "all")
+			list, err := User.GetNotifications(ctx, tenantID, userID, "all")
 			So(err, ShouldBeNil)
 			So(len(list), ShouldEqual, 1)
 			So(list[0].Title, ShouldEqual, "Welcome")