Aggiunge annunci in-app/sito, contatti e migliora UI copertina sul portale.

Include admin/API/banner nativi, form contatti e reset copertina standard con layout edit più ampio.

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

backend/config/locales/ui.es.yml

@@ -141,6 +141,7 @@ es:
   common:
     privacy: Privacidad
     support: Soporte
+    contacts: Contacto
     cookies: Cookies
     terms: Términos
     pricing: Precios
@@ -174,3 +175,7 @@ es:
     choice_youtube_hint_only: Elimina solo el vídeo de YouTube
     choice_both_label: Sitio y YouTube
     choice_both_hint: Eliminación completa
+  announcement:
+    region: Avisos
+    dismiss: Cerrar aviso
+    open: Abrir