failed payment method handling

frontend/src/types/index.ts

@@ -151,6 +151,9 @@ export interface Rental {
   bankDepositAt?: string;
   stripePayoutId?: string;
   bankDepositFailureCode?: string;
+  // Payment failure tracking
+  paymentFailedNotifiedAt?: string;
+  paymentMethodUpdatedAt?: string;
   intendedUse?: string;
   rating?: number;
   review?: string;