Checkout‑Registrierung validiert jetzt die E‑Mail‑Länge, und die Checkout‑Flows sind Paddle‑only: Stripe‑Endpoints/

Services/Helpers sind entfernt, API/Frontend angepasst, Tests auf Paddle umgestellt. Außerdem wurde die CSP gestrafft
  und Stripe‑Texte in den Abandoned‑Checkout‑Mails ersetzt.

resources/js/admin/api.ts

@@ -2194,39 +2194,13 @@ export async function getTenantAddonHistory(page = 1, perPage = 25): Promise<{
   return { data: rows, meta };
 }
 
-export async function createTenantPackagePaymentIntent(packageId: number): Promise<string> {
-  const response = await authorizedFetch('/api/v1/tenant/packages/payment-intent', {
-    method: 'POST',
-    headers: {
-      'Content-Type': 'application/json',
-    },
-    body: JSON.stringify({ package_id: packageId }),
-  });
-
-  const data = await jsonOrThrow<{ client_secret: string }>(
-    response,
-    'Failed to create package payment intent'
-  );
-
-  if (!data.client_secret) {
-    throw new Error('Missing client secret in response');
-  }
-
-  return data.client_secret;
-}
-
 export async function completeTenantPackagePurchase(params: {
   packageId: number;
-  paymentMethodId?: string;
-  paddleTransactionId?: string;
+  paddleTransactionId: string;
 }): Promise<void> {
-  const { packageId, paymentMethodId, paddleTransactionId } = params;
+  const { packageId, paddleTransactionId } = params;
   const payload: Record<string, unknown> = { package_id: packageId };
 
-  if (paymentMethodId) {
-    payload.payment_method_id = paymentMethodId;
-  }
-
   if (paddleTransactionId) {
     payload.paddle_transaction_id = paddleTransactionId;
   }