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.de.yml

@@ -141,6 +141,7 @@ de:
   common:
     privacy: Datenschutz
     support: Support
+    contacts: Kontakt
     cookies: Cookies
     terms: AGB
     pricing: Preise
@@ -174,3 +175,7 @@ de:
     choice_youtube_hint_only: Entfernt nur das YouTube-Video
     choice_both_label: Website und YouTube
     choice_both_hint: Vollständige Löschung
+  announcement:
+    region: Hinweise
+    dismiss: Hinweis schließen
+    open: Öffnen