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.fr.yml

@@ -141,6 +141,7 @@ fr:
   common:
     privacy: Confidentialité
     support: Support
+    contacts: Contacts
     cookies: Cookies
     terms: Conditions
     pricing: Tarifs
@@ -174,3 +175,7 @@ fr:
     choice_youtube_hint_only: Supprime uniquement la vidéo YouTube
     choice_both_label: Site et YouTube
     choice_both_hint: Suppression complète
+  announcement:
+    region: Alertes
+    dismiss: Fermer l'alerte
+    open: Ouvrir