Fix booking defaults, dashboard alerts, admin edit flow, and ended-event payments.

Require an explicit payment method on booking, hide stale release banners for past or inactive events, open event editing in place on the detail page, and auto-reject unconfirmed payments after events end without sending email.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/index.ts

@@ -27,6 +27,7 @@ import emailService from './lib/email.js';
 import { initEmailQueue } from './lib/emailQueue.js';
 import { startBookingCleanup } from './lib/bookingCleanup.js';
 import { startHoldSweep } from './lib/holdSweep.js';
+import { startEventEndSweep } from './lib/eventEndSweep.js';
 import { getLock } from './lib/stores/lock.js';
 import { describeBackends, describeRedis, logSelectedBackends } from './lib/backends.js';
 
@@ -1936,6 +1937,9 @@ startBookingCleanup();
 // Periodically put stale pending-approval payments on hold, releasing their seats.
 startHoldSweep();
 
+// Periodically auto-reject unconfirmed payments once their event is over (no email).
+startEventEndSweep();
+
 // Initialize email templates on startup.
 // Guarded by a distributed lock so that, when running multiple replicas, only
 // one instance seeds/updates templates per boot instead of all of them racing.