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/credential_resolver.rb

@@ -0,0 +1,24 @@
+module Youtube
+  class CredentialResolver
+    def self.for_team(team)
+      new(team).resolve
+    end
+
+    def initialize(team)
+      @team = team
+      @mode = team.entitlements.plan.youtube_mode
+    end
+
+    def resolve
+      if @mode == "matchlivetv_light" && PlatformCredential.configured?
+        PlatformCredential.new
+      else
+        @team.youtube_credential
+      end
+    end
+
+    def uses_platform_channel?
+      @mode == "matchlivetv_light" && PlatformCredential.configured?
+    end
+  end
+end