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/db/migrate/20260525120000_enable_youtube_on_premium_light_plan.rb

@@ -0,0 +1,20 @@
+class EnableYoutubeOnPremiumLightPlan < ActiveRecord::Migration[7.2]
+  def up
+    plan = Plan.find_by(slug: "premium_light")
+    return unless plan
+
+    features = plan.features.deep_dup
+    platforms = Array(features["platforms"]).map(&:to_s)
+    features["platforms"] = (platforms + ["youtube"]).uniq
+    plan.update!(features: features)
+  end
+
+  def down
+    plan = Plan.find_by(slug: "premium_light")
+    return unless plan
+
+    features = plan.features.deep_dup
+    features["platforms"] = Array(features["platforms"]).map(&:to_s) - ["youtube"]
+    plan.update!(features: features)
+  end
+end