Backend and frontend updates: auth, email, payments, events, tickets; carrousel images; mobile event detail layout; i18n

frontend/src/app/(public)/booking/success/[ticketId]/page.tsx

@@ -229,12 +229,15 @@ export default function BookingSuccessPage() {
           {isPaid && (
             <div className="mb-6">
               <a 
-                href={`/api/tickets/${ticketId}/pdf`}
+                href={ticket.bookingId 
+                  ? `/api/tickets/booking/${ticket.bookingId}/pdf`
+                  : `/api/tickets/${ticketId}/pdf`
+                }
                 download
                 className="inline-flex items-center gap-2 px-4 py-2 bg-primary-yellow text-primary-dark font-medium rounded-btn hover:bg-primary-yellow/90 transition-colors"
               >
                 <ArrowDownTrayIcon className="w-5 h-5" />
-                {locale === 'es' ? 'Descargar Ticket' : 'Download Ticket'}
+                {locale === 'es' ? 'Descargar Ticket(s)' : 'Download Ticket(s)'}
               </a>
             </div>
           )}