Integrazione YouTube Live: OAuth squadra, canale piattaforma Light e UI.

Collegamento da Dettagli squadra e admin per il refresh token Match Live TV; API e app mobile allineate ai piani Light/Full.

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

backend/app/services/youtube/oauth_exchange.rb

@@ -13,12 +13,13 @@ module Youtube
       data = JSON.parse(response.body)
       raise BroadcastService::Error, data["error_description"] if data["error"]
 
+      info = ChannelInfo.fetch(access_token: data["access_token"])
       {
         access_token: data["access_token"],
         refresh_token: data["refresh_token"],
         expires_in: data["expires_in"].to_i,
-        channel_id: nil,
-        channel_title: nil
+        channel_id: info[:channel_id],
+        channel_title: info[:channel_title]
       }
     end
   end