Admin event: Manual ticket + Tickets tab

- Backend: POST /api/tickets/admin/manual - creates ticket and sends confirmation + ticket email
- Frontend: Manual Ticket button and modal (email required, sends confirmation + ticket)
- New Tickets tab between Attendees and Send Email: confirmed tickets table with search (name/ticket ID), status filter, check-in actions

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

frontend/src/lib/api.ts

@@ -145,6 +145,20 @@ export const ticketsApi = {
       body: JSON.stringify(data),
     }),
   
+  manualCreate: (data: {
+    eventId: string;
+    firstName: string;
+    lastName?: string;
+    email: string;
+    phone?: string;
+    preferredLanguage?: 'en' | 'es';
+    adminNote?: string;
+  }) =>
+    fetchApi<{ ticket: Ticket; payment: Payment; message: string }>('/api/tickets/admin/manual', {
+      method: 'POST',
+      body: JSON.stringify(data),
+    }),
+  
   checkPaymentStatus: (ticketId: string) =>
     fetchApi<{ ticketStatus: string; paymentStatus: string; lnbitsStatus?: string; isPaid: boolean }>(
       `/api/lnbits/status/${ticketId}`