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/app/views/layouts/admin.html.erb

@@ -4,7 +4,7 @@
   <title><%= t("admin.layout.title") %></title>
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <meta name="robots" content="noindex, nofollow">
-  <link rel="stylesheet" href="/admin.css?v=4">
+  <link rel="stylesheet" href="/admin.css?v=6">
   <% if content_for?(:replay_archive_styles) %>
     <link rel="stylesheet" href="/marketing.css?v=42">
   <% end %>
@@ -25,6 +25,7 @@
         <%= link_to admin_ops_path, class: ("active" if controller_name == "ops") do %>
           <%= t("admin.layout.nav.ops") %><% if ops_critical.positive? %> <span class="admin-nav-badge"><%= ops_critical %></span><% end %>
         <% end %>
+        <%= link_to t("admin.layout.nav.announcements"), admin_announcements_path, class: ("active" if controller_name == "announcements") %>
         <%= link_to t("admin.layout.nav.clubs"), admin_clubs_path, class: ("active" if controller_name.in?(%w[clubs teams club_recordings])) %>
         <%= link_to t("admin.layout.nav.billing"), admin_billing_path, class: ("active" if controller_name.in?(%w[billing billing_invoices])) %>
         <%= link_to t("admin.layout.nav.youtube"), admin_youtube_platform_path, class: ("active" if controller_name == "youtube") %>