Aggiunge copertina sponsor custom solo Premium Full, con override in wizard e slate sui nodi di streaming.

Permette upload da portale e app con ereditarietà partita→squadra→società, generazione MP4 via ffmpeg e distribuzione su home lab e nodi CPX per pause e assenza segnale.

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

backend/spec/services/streams/cover_slate_ensurer_spec.rb

@@ -0,0 +1,38 @@
+require "rails_helper"
+
+RSpec.describe Streams::CoverSlateEnsurer do
+  let!(:club) { Club.create!(name: "Club", sport: "volleyball", primary_color: "#e53935", secondary_color: "#ffffff") }
+  let!(:team) { club.teams.create!(name: "Team", sport: "volleyball") }
+  let!(:match) { team.matches.create!(opponent_name: "Opp", sport: "volleyball") }
+
+  before do
+    load Rails.root.join("db/seeds/plans.rb")
+    Billing::AssignPlan.call(club: club, plan_slug: "premium_full")
+    match.cover_image.attach(
+      io: StringIO.new("img"),
+      filename: "c.png",
+      content_type: "image/png"
+    )
+  end
+
+  it "genera in sync se manca cover_slate" do
+    expect(Streams::GenerateCoverSlate).to receive(:call).with(match).and_return(match)
+    described_class.ensure_for!(match)
+  end
+
+  it "non rigenera se slate pronta su disco" do
+    match.cover_slate.attach(
+      io: StringIO.new("mp4"),
+      filename: "s.mp4",
+      content_type: "video/mp4"
+    )
+    path = Streams::CoverSlatePaths.expected_path(match)
+    FileUtils.mkdir_p(File.dirname(path))
+    File.write(path, "fake")
+
+    expect(Streams::GenerateCoverSlate).not_to receive(:call)
+    described_class.ensure_for!(match)
+  ensure
+    FileUtils.rm_f(path) if defined?(path) && path
+  end
+end