Payment

Subscription and one-time payment support via a provider pattern . Stripe and Creem are the hosted-checkout gateways (primary path): set VITE_PAYMENT_PROVIDER to 'stripe' or 'creem' to enable one of them; set it to '' (empty, the default) to disable payment entirely. Both implement the same PaymentProvider interface, so downstream code (checkout, billing, webhooks) is provider-agnostic. PayPal (NCP) and Alipay (page.pay) run as secondary regional gateways alongside — see the last section. See Env (./env.md) for all variables.