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/team_roster_members/edit.html.erb

@@ -1,8 +1,8 @@
-<% content_for :title, "Modifica — #{@member.full_name}" %>
+<% content_for :title, t("roster.edit.title", name: @member.full_name) %>
 <% content_for :robots, "noindex, nofollow" %>
 
 <div class="wrap" style="padding-top:20px;max-width:520px">
-  <p class="muted"><%= link_to "← Dettagli squadra", public_team_details_path(@team) %></p>
+  <p class="muted"><%= link_to t("roster.back_to_details"), public_team_details_path(@team) %></p>
   <h1><%= @member.full_name %></h1>
   <%= render "shared/roster_member_form", member: @member, team: @team %>
 </div>