fix(checkout): fix syntax and hook structure in CheckoutPage

frontend/application/components/CheckoutPage.tsx

@@ -258,6 +258,8 @@ export default function CheckoutPage() {
         </div>
       </div>
     );
+  }
+
   return (
     <div className="min-h-screen bg-medical-gray-50/60 py-4 sm:py-8 px-3 sm:px-6 font-vazir w-full max-w-full overflow-x-hidden text-right" dir="rtl">
       <div className="max-w-7xl mx-auto w-full">