Rebuild the payment screen as a clear confirm-and-pay card: appointment
summary (doctor, patient, Jalali date/time), a prominent amount row
(15,000 تومان from the backend's 150,000 rials), and a countdown with a
progress bar tied to the booking's real expires_at. Fetch
/api/v1/payment/config: in test mode show a 'درگاه آزمایشی' notice and a
'پرداخت آزمایشی' button (gateway select hidden, since the backend forces
MockGateway); otherwise show the bank gateway select. Expired state
offers re-selecting a time.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
