refactor: remove obsolete member management API module

apps/web/app/[locale]/home/[account]/events/registrations/page.tsx

@@ -36,12 +36,12 @@ export default async function EventRegistrationsPage({ params }: PageProps) {
   if (!acct) return <AccountNotFound />;
 
   const api = createEventManagementApi(client);
-  const events = await api.listEvents(acct.id, { page: 1 });
+  const events = await api.events.list(acct.id, { page: 1 });
 
   // Load registrations for each event in parallel
   const eventsWithRegistrations = await Promise.all(
     events.data.map(async (event: Record<string, unknown>) => {
-      const registrations = await api.getRegistrations(String(event.id));
+      const registrations = await api.registrations.list(String(event.id));
       return {
         id: String(event.id),
         name: String(event.name),