Completa i18n IT/EN/FR/DE/ES su sito pubblico, area autenticata e admin.

Tutte le view marketing, legali, viewer, dashboard e admin usano t(); mailer utente-facing e flash localizzati; admin con LocaleResolver e selettore lingua.

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

backend/app/views/public/clubs/billing.html.erb

@@ -1,20 +1,19 @@
-<% content_for :title, "Abbonamento — #{@club.name}" %>
+<% content_for :title, t("club.billing.title", name: @club.name) %>
 <% content_for :robots, "noindex, nofollow" %>
 
 <div class="wrap" style="padding-top:20px">
-  <h1>Abbonamento</h1>
+  <h1><%= t("billing.heading") %></h1>
   <%= render "shared/club_subscription_status", club: @club, entitlements: @entitlements, subscription: @subscription, on_billing_page: true %>
 
   <% if @subscription&.admin_comped? %>
     <div class="card" style="margin-top:16px;border-color:#3d3520;background:#1a1810">
       <p style="margin:0;color:#ddd">
-        <strong>Abbonamento omaggio Match Live TV</strong>
-        — piano <strong><%= @subscription.plan.name %></strong>
+        <strong><%= t("club.billing.comped.title") %></strong>
+        <%= t("club.billing.comped.plan_prefix") %> <strong><%= @subscription.plan.name %></strong>
         <% if @subscription.admin_comped_reason.present? %>
           (<%= @subscription.admin_comped_reason %>)
         <% end %>.
-        Non è richiesto alcun pagamento. Per modifiche o passaggio a un piano a pagamento, contatta
-        <%= mail_to "info@matchlive.it", "info@matchlive.it" %>.
+        <%= raw t("club.billing.comped.no_payment_html", email_link: mail_to("info@matchlive.it", "info@matchlive.it")) %>
       </p>
     </div>
   <% else %>
@@ -28,5 +27,5 @@
 
   <%= render "shared/billing_documents", club: @club, payments: @payments %>
 
-  <p style="margin-top:24px"><%= link_to "← Società", public_club_path(@club) %></p>
+  <p style="margin-top:24px"><%= link_to t("club.back_to_club"), public_club_path(@club) %></p>
 </div>