createPayment() and recordOrder() hardcoded currency: 'RUB' regardless
of LanguageService.currentCurrency() (app supports RUB/USD/EUR/AMD).
Widened CartPaymentRequest.currency from a 'RUB' literal to string and
use the actual selected currency in both calls.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
createOrder() sent a discount-applied price per line item that the
client computed itself, with no server revalidation. Items now only
carry productId/name/quantity - the backend must price from its own
catalog. createPayment()'s amount (required to actually charge the
payment gateway) is unchanged; backend must revalidate it instead,
tracked in BACKEND-API-REFERENCE.md §12.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
- CartPaymentRequest gains qrDescription (brandName > hostname > fallback
text) and customerID (telegram id)
- QrCreateResponse gains qrTTL; polling window now derived from it
(min 60s) instead of a fixed 3-minute/36-check cap
- PAYMENT_MAX_CHECKS replaced by PAYMENT_MIN_POLL_SECONDS
Unify product details modules behind config-driven contracts so teams can
extend UX without changing runtime architecture or bootstrap flow.
Keep backward compatibility with existing product payloads by treating new
media/specification/variant/related structures as optional extensions.
Improve conversion and content discoverability with reusable actions,
typed media rendering, grouped specifications, dynamic variants, and
multi-collection related products.
