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/admin/sessions/show.html.erb

@@ -1,26 +1,32 @@
-<h2>Session <%= @session.id %></h2>
-<p>Status: <strong><%= @session.status %></strong></p>
+<h2><%= t("admin.sessions.show.title", id: @session.id) %></h2>
+<p><%= t("admin.sessions.show.status_label") %> <strong><%= @session.status %></strong></p>
 <% unless @session.terminal? %>
   <p>
-    <%= button_to "Termina sessione",
+    <%= button_to t("admin.sessions.show.stop_button"),
           stop_admin_session_path(@session),
           method: :post,
           class: "admin-btn admin-btn--danger",
-          form: { data: { turbo_confirm: "Terminare la trasmissione? Il path RTMP verrà rimosso e lo stato passerà a ended." } } %>
+          form: { data: { turbo_confirm: t("admin.sessions.show.stop_confirm") } } %>
   </p>
 <% end %>
-<p>Match: <%= @session.match.team.name %> vs <%= @session.match.opponent_name %></p>
+<p><%= t("admin.sessions.show.match_label", team: @session.match.team.name, opponent: @session.match.opponent_name) %></p>
 
 <%= render "admin/sessions/links", session: @session %>
 
 <% if @session.youtube_broadcast_id %>
-  <p>YouTube Studio: <a href="https://studio.youtube.com/video/<%= @session.youtube_broadcast_id %>/livestreaming" target="_blank" rel="noopener">Broadcast</a></p>
+  <p><%= t("admin.sessions.show.youtube_studio") %>: <a href="https://studio.youtube.com/video/<%= @session.youtube_broadcast_id %>/livestreaming" target="_blank" rel="noopener"><%= t("admin.sessions.show.broadcast") %></a></p>
 <% end %>
-<p>RTMP ingest: <code><%= @session.rtmp_ingest_url %></code></p>
+<p><%= t("admin.sessions.show.rtmp_ingest") %> <code><%= @session.rtmp_ingest_url %></code></p>
 
-<h3>Eventi</h3>
+<h3><%= t("admin.sessions.show.events_title") %></h3>
 <table>
-  <thead><tr><th>Tipo</th><th>Quando</th><th>Meta</th></tr></thead>
+  <thead>
+    <tr>
+      <th><%= t("admin.sessions.show.table.type") %></th>
+      <th><%= t("admin.sessions.show.table.when") %></th>
+      <th><%= t("admin.sessions.show.table.meta") %></th>
+    </tr>
+  </thead>
   <tbody>
     <% @events.each do |e| %>
       <tr>