fix(medusa, admin-ui, medusa-react): Gift Card update fixes and admin UI cleanup (#3676)

* fix gc domain issues

* add changeset

* update changeset

* more minor fixes, remove breadcrumb

* more cleanup

* address feedback

packages/admin-ui/ui/src/utils/form-validator.ts

@@ -48,6 +48,10 @@ const FormValidator = {
       `${name} must be less than or equal to ${getNormalizedAmount(currency)}.`
     )
   },
+  email: (name: string) => ({
+    value: /^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,}$/i,
+    message: `${name} must be a valid email address.`,
+  }),
 }
 
 /**