SEO: robots.txt, sitemap, Organization & Event schema; dashboard fmtTime fix; frontend updates

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

frontend/src/app/admin/emails/page.tsx

@@ -373,6 +373,7 @@ export default function AdminEmailsPage() {
       year: 'numeric',
       hour: '2-digit',
       minute: '2-digit',
+      timeZone: 'America/Asuncion',
     });
   };
 
@@ -545,7 +546,7 @@ export default function AdminEmailsPage() {
               <div className="flex items-center gap-2">
                 {hasDraft && (
                   <span className="text-xs text-gray-500">
-                    Draft saved {composeForm.savedAt ? new Date(composeForm.savedAt).toLocaleString() : ''}
+                    Draft saved {composeForm.savedAt ? new Date(composeForm.savedAt).toLocaleString(locale === 'es' ? 'es-ES' : 'en-US', { timeZone: 'America/Asuncion' }) : ''}
                   </span>
                 )}
                 <Button variant="outline" size="sm" onClick={saveDraft}>
@@ -571,7 +572,7 @@ export default function AdminEmailsPage() {
                   <option value="">Choose an event</option>
                   {events.filter(e => e.status === 'published').map((event) => (
                     <option key={event.id} value={event.id}>
-                      {event.title} - {new Date(event.startDatetime).toLocaleDateString()}
+                      {event.title} - {new Date(event.startDatetime).toLocaleDateString(locale === 'es' ? 'es-ES' : 'en-US', { timeZone: 'America/Asuncion' })}
                     </option>
                   ))}
                 </select>