storefront/checkout

One-page customer identity, authoritative quote review and provider handoff.

CheckoutPanel.tsx: owns draft/review lifecycle, modal locks and confirmation.
CheckoutApproval.tsx: B2B approval after native delivery/payment review, then read-only refresh of the exact cart. Purchase remains blocked for missing approval/budget; changed quotes reset review.
CheckoutDetails.tsx: native form, customer account, addresses and selection.
CheckoutIdentity.tsx: existing login/register and customer contact controls.
SavedPaymentChoice.tsx and useSavedPaymentMethods.ts: current-account consent, redacted instrument choice and native revocation; no provider tokens in browser state.
CheckoutMethods.tsx: destination-aware delivery/payment radio choices.
CheckoutSummary.tsx: actual item media, quantity/coupon, totals and discounts.
CheckoutPurchase.tsx: single explicit review/purchase action in the persistent dock.
CheckoutProgress.tsx: accessible data/review/completion steps.
OrderCompletion.tsx: actual accepted order snapshot and scoped payment recovery.
OrderConfetti.tsx: finite decorative CSS celebration with reduced-motion support.
checkout-order.ts: tenant/channel/cart transport, current customer session, reviewed revision/cents and replay key. The shared customer-session.ts owner supplies the same identity used by all Store API requests; current B2B grants are rechecked by the server.
PaymentSession.tsx: verified status, bounded polling, provider return and recovery.
../styles/checkout.css: responsive checkout layout and touch/focus states.

Checkout contract and proof boundary. Run frontend build, tests, architecture/localization and coverage checks. Coverage includes untested source; file presence does not mean full coverage.