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/helpers/roster_helper.rb

@@ -19,14 +19,14 @@ module RosterHelper
 
   def roster_category_options
     TeamRosterMember::DISPLAY_ORDER.map do |cat|
-      [TeamRosterMember::CATEGORY_LABELS[cat], cat]
+      [TeamRosterMember.category_label(cat), cat]
     end
   end
 
   def roster_player_role_options(team, selected = nil)
     roles = Sports::PlayerRoles.for_team(team)
     options_for_select(
-      [["— Seleziona ruolo —", ""]] + roles.map { |r| [r, r] },
+      [[t("roster.role_select_blank"), ""]] + roles.map { |r| [r, r] },
       selected
     )
   end