feat: Enhance donation system with new components and improved dialog

frontend/src/views/creators/DonationDialog.vue

@@ -103,9 +103,14 @@ async function handleSubmit({ amount, message }) {
   isPaymentDialogActive.value = true;
 
   const response = await createCheckoutSession(amount, message);
-
-  // Redirect to the Stripe Checkout page
-  window.location.href = response.stripeCheckoutUrl;
+  
+  if (response && response.url) {
+    // Redirect to the Stripe Checkout page
+    window.location.href = response.url;
+  } else {
+    errorMessage.value = t('creator.donation.errors.payment');
+    isPaymentDialogActive.value = false;
+  }
 }
 
 defineExpose({