wenn checkout.completed kommt, senden wir jetzt transaction_id +

checkout_id direkt an das Backend, damit der Server die Session via Paddle‑API finalisiert (auch wenn der Webhook
  nicht greift). Dadurch sollte “Zahlung wird verarbeitet” nicht mehr hängen bleiben.

resources/js/pages/marketing/checkout/steps/PaymentStep.tsx

@@ -202,6 +202,7 @@ export const PaymentStep: React.FC = () => {
   const [confirmationElapsedMs, setConfirmationElapsedMs] = useState(0);
   const confirmationTimerRef = useRef<number | null>(null);
   const statusCheckRef = useRef<(() => void) | null>(null);
+  const confirmRequestRef = useRef(false);
 
   const paddleLocale = useMemo(() => {
     const sourceLocale = i18n.language || (typeof document !== 'undefined' ? document.documentElement.lang : null);
@@ -210,6 +211,33 @@ export const PaymentStep: React.FC = () => {
 
   const isFree = useMemo(() => (selectedPackage ? Number(selectedPackage.price) <= 0 : false), [selectedPackage]);
 
+  const confirmCheckoutSession = useCallback(async (payload: Record<string, unknown>) => {
+    if (!checkoutSessionId) {
+      return;
+    }
+
+    const transactionId = typeof payload?.transaction_id === 'string' ? payload.transaction_id : null;
+    const checkoutId = typeof payload?.id === 'string' ? payload.id : null;
+
+    if (!transactionId && !checkoutId) {
+      return;
+    }
+
+    try {
+      await fetch(`/checkout/session/${checkoutSessionId}/confirm`, {
+        method: 'POST',
+        headers: buildCheckoutHeaders(),
+        credentials: 'same-origin',
+        body: JSON.stringify({
+          transaction_id: transactionId,
+          checkout_id: checkoutId,
+        }),
+      });
+    } catch (error) {
+      console.warn('Failed to confirm Paddle session', error);
+    }
+  }, [checkoutSessionId]);
+
   const applyCoupon = useCallback(async (code: string) => {
     if (!selectedPackage) {
       return;
@@ -521,6 +549,10 @@ export const PaymentStep: React.FC = () => {
         setInlineActive(false);
         setAwaitingConfirmation(true);
         setPaymentCompleted(false);
+        if (!confirmRequestRef.current) {
+          confirmRequestRef.current = true;
+          void confirmCheckoutSession(event.data as Record<string, unknown>);
+        }
         toast.success(t('checkout.payment_step.toast_success'));
       }
 
@@ -596,6 +628,7 @@ export const PaymentStep: React.FC = () => {
     setInlineActive(false);
     setAwaitingConfirmation(false);
     setConfirmationElapsedMs(0);
+    confirmRequestRef.current = false;
   }, [selectedPackage?.id, setPaymentCompleted]);
 
   useEffect(() => {