Billing Stripe, link regia mobile e staff solo trasmissione.

Aggiunge fatturazione club, pagina regia condivisibile senza account, roster squadre e rimuove la modalità controller dall'app (v1.1.0).

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

backend/spec/services/billing/stripe/change_plan_spec.rb

@@ -0,0 +1,57 @@
+require "rails_helper"
+
+RSpec.describe Billing::Stripe::ChangePlan do
+  let(:club) { Club.create!(name: "Billing Club", sport: "volleyball", primary_color: "#e53935", secondary_color: "#ffffff") }
+
+  before do
+    load Rails.root.join("db/seeds/plans.rb")
+    Billing::AssignPlan.call(
+      club: club,
+      plan_slug: "premium_light",
+      status: "active",
+      stripe_attrs: {
+        stripe_customer_id: "cus_test",
+        stripe_subscription_id: "sub_test_123"
+      }
+    )
+    allow(MatchLiveTv).to receive(:stripe_enabled?).and_return(true)
+    allow(MatchLiveTv).to receive(:stripe_premium_light_price_id).and_return("price_light")
+    allow(MatchLiveTv).to receive(:stripe_premium_full_price_id).and_return("price_full")
+    Plan.find_by!(slug: "premium_light").update!(stripe_price_id: "price_light")
+    Plan.find_by!(slug: "premium_full").update!(stripe_price_id: "price_full")
+  end
+
+  it "aggiorna Stripe e il piano locale verso premium_full" do
+    stripe_item = double(id: "si_test")
+    stripe_sub = double(
+      id: "sub_test_123",
+      customer: "cus_test",
+      status: "active",
+      current_period_start: Time.current.to_i,
+      current_period_end: 1.year.from_now.to_i,
+      cancel_at_period_end: false,
+      items: double(data: [stripe_item])
+    )
+    updated_sub = stripe_sub
+
+    allow(Stripe::Subscription).to receive(:retrieve).with("sub_test_123").and_return(stripe_sub)
+    allow(Stripe::Subscription).to receive(:update).and_return(updated_sub)
+
+    described_class.call(club: club, plan_slug: "premium_full")
+
+    expect(Stripe::Subscription).to have_received(:update).with(
+      "sub_test_123",
+      hash_including(
+        items: [{ id: "si_test", price: "price_full" }],
+        metadata: { club_id: club.id, plan_slug: "premium_full" }
+      )
+    )
+    expect(club.reload.subscription.plan.slug).to eq("premium_full")
+  end
+
+  it "rifiuta il cambio sullo stesso piano" do
+    expect {
+      described_class.call(club: club, plan_slug: "premium_light")
+    }.to raise_error(/già su questo piano/)
+  end
+end