Fix prezzi pubblici: Premium Light €5/€40, Full €20/€200.

Ripristina le etichette in PriceCatalog usate da prezzi, abbonamento e checkout.

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

backend/spec/helpers/public/billing_helper_spec.rb

@@ -32,7 +32,7 @@ RSpec.describe Public::BillingHelper, type: :helper do
       current_interval: "yearly"
     )
     expect(action[:kind]).to eq(:current)
-    expect(action[:label]).to include("€39,90/anno")
+    expect(action[:label]).to include("€40/anno")
   end
 
   it "propone cambio intervallo sullo stesso piano" do

backend/spec/requests/public/club_billing_spec.rb

@@ -72,7 +72,7 @@ RSpec.describe "Public club billing", type: :request do
     get public_club_billing_path(club)
 
     expect(response.body).to include("Completa dati di fatturazione")
-    expect(response.body).not_to include("Attiva Premium Light — €39,90/anno")
+    expect(response.body).not_to include("Attiva Premium Light — €40/anno")
   end
 
   it "dopo profilo completo reindirizza al checkout" do
@@ -111,8 +111,8 @@ RSpec.describe "Public club billing", type: :request do
 
     login!
     get public_club_billing_path(club)
-    expect(response.body).to include("Attiva Premium Light — €39,90/anno")
-    expect(response.body).to include("Attiva Premium Light — €4,90/mese")
+    expect(response.body).to include("Attiva Premium Light — €40/anno")
+    expect(response.body).to include("Attiva Premium Light — €5/mese")
 
     allow(Billing::Stripe::CheckoutSession).to receive(:new).and_return(
       instance_double(Billing::Stripe::CheckoutSession, url: "https://checkout.stripe.com/test")