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/users/page.tsx

@@ -3,6 +3,7 @@
 import { useState, useEffect } from 'react';
 import { useLanguage } from '@/context/LanguageContext';
 import { usersApi, User } from '@/lib/api';
+import { parseDate } from '@/lib/utils';
 import Card from '@/components/ui/Card';
 import Button from '@/components/ui/Button';
 import Input from '@/components/ui/Input';
@@ -104,7 +105,7 @@ export default function AdminUsersPage() {
   };
 
   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', {
       year: 'numeric', month: 'short', day: 'numeric', timeZone: 'America/Asuncion',
     });
   };