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/controllers/public/sessions_controller.rb

@@ -17,16 +17,16 @@ module Public
                else
                  public_new_club_path
                end
-        redirect_to dest, notice: "Bentornato!"
+        redirect_to dest, notice: t("flash.sessions.welcome_back")
       else
-        flash.now[:alert] = "Email o password non validi"
+        flash.now[:alert] = t("flash.sessions.invalid_credentials")
         render :new, status: :unauthorized
       end
     end
 
     def destroy
       reset_session
-      redirect_to public_pricing_path, notice: "Disconnesso"
+      redirect_to public_pricing_path, notice: t("flash.sessions.logged_out")
     end
   end
 end