Booking flow: required terms and privacy checkbox with i18n

Also includes admin, dashboard, and API updates; PWA icon assets; and
assorted layout and utility changes on dev.

frontend/src/app/admin/page.tsx

@@ -15,6 +15,7 @@ import {
   UserGroupIcon,
   ExclamationTriangleIcon,
 } from '@heroicons/react/24/outline';
+import { parseDate } from '@/lib/utils';
 
 export default function AdminDashboardPage() {
   const { t, locale } = useLanguage();
@@ -30,7 +31,7 @@ export default function AdminDashboardPage() {
   }, []);
 
   const formatDate = (dateStr: string) => {
-    return new Date(dateStr).toLocaleDateString(locale === 'es' ? 'es-ES' : 'en-US', {
+    return parseDate(dateStr).toLocaleDateString(locale === 'es' ? 'es-ES' : 'en-US', {
       month: 'short',
       day: 'numeric',
       hour: '2-digit',