Messaggi chiari per errori YouTube API in creazione diretta.

Include guida su liveStreamingNotEnabled e token non validi.

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

backend/app/controllers/admin/clubs_controller.rb

@@ -3,7 +3,7 @@ module Admin
     before_action :set_club, only: %i[show grant_comped revoke_comped]
 
     def index
-      @clubs = Club.includes(:subscription, :teams, subscription: :plan, subscription: :admin_comped_by)
+      @clubs = Club.includes(:teams, subscription: %i[plan admin_comped_by])
                    .order(:name)
     end
 

backend/app/services/youtube/broadcast_service.rb

@@ -46,7 +46,7 @@ module Youtube
         rtmp_url: stream_result.cdn.ingestion_info.ingestion_address
       }
     rescue Google::Apis::Error => e
-      raise Error, e.message
+      raise Error, friendly_api_error(e)
     end
 
     def complete_broadcast!(broadcast_id)
@@ -86,5 +86,13 @@ module Youtube
     def authorized_client
       OauthRefresh.new(@credential).apply!(Google::Apis::YoutubeV3::YouTubeService.new)
     end
+
+    def friendly_api_error(error)
+      msg = error.message.to_s
+      return "Il canale YouTube non ha la diretta attiva. Apri YouTube Studio con l’account del canale Match Live TV, abilita la live (verifica telefono se richiesto) e riprova." if msg.include?("liveStreamingNotEnabled")
+      return "Credenziali YouTube non valide. Ricollega il canale dalla sezione Admin → YouTube." if msg.match?(/Unauthorized|invalid_grant/i)
+
+      msg
+    end
   end
 end