Commerce

Three-step checkout (cart → payment → confirm) with animated step transitions, an inline PaymentForm, a success screen that fires a confetti burst with an animated checkmark, and an error screen with retry. Async submit is forwarded to the consumer-provided `onSubmit`, which returns an `orderId` that ends up on the success screen.

Credit-card checkout form with a live 3D card preview, wallet shortcut buttons (Apple Pay / Google Pay / PayPal), brand auto-detection, Luhn validation, expiry / CVC checks, and a hookable async submit. Wallet buttons emit a `wallet` event so the consumer wires the actual SDK; the card form emits `success` / `error` after the consumer-provided `onSubmit` settles.

List of stored payment cards using compact 3D card visuals. Marks one as the default, allows setting a different one as default, removing with a confirmation dialog, and adding a new card via an inline PaymentForm that collapses open. Emits `add`, `remove`, and `set-default` — consumer owns the persistence.