Unifica admin società/squadre e YouTube Full con fallback MLTV.

Premium Full senza canale società usa il canale piattaforma come Light;
in app restano solo Match Live TV e YouTube Live.

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

backend/app/controllers/admin/teams_controller.rb

@@ -1,7 +1,7 @@
 module Admin
   class TeamsController < Admin::BaseController
     def index
-      @teams = Team.all.order(:name)
+      redirect_to admin_clubs_path, status: :moved_permanently
     end
 
     def show