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/contacts/page.tsx

@@ -7,6 +7,7 @@ import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
 import { EnvelopeIcon, EnvelopeOpenIcon, CheckIcon } from '@heroicons/react/24/outline';
 import toast from 'react-hot-toast';
+import { parseDate } from '@/lib/utils';
 
 export default function AdminContactsPage() {
   const { t, locale } = useLanguage();
@@ -44,7 +45,7 @@ export default function AdminContactsPage() {
   };
 
   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',