A deliberately-paced Book New wizard could outlive the portal impersonation
session, so the final POST /api/portal/waitlist returned 401 and the UI showed
"Failed to book appointment. Please try again."
BookingFlow now retries once on a 401: it re-mints a fresh portal session via
POST /api/portal/session-from-auth (the customer's Better Auth cookie is still
valid) and resubmits the waitlist request with the new
X-Impersonation-Session-Id. Falls through to the existing error if no Better
Auth session is available (staff/dev impersonation paths).
- Appointments.tsx: remintPortalSession() helper; handleConfirmBooking submits
via submitWaitlist(id) and retries once after a 401 re-mint.
- Test: first waitlist POST 401 -> re-mint -> retry with fresh id -> success;
asserts exactly one re-mint and the header sequence.
- UAT_PLAYBOOK.md 5.12e: TC-WEB-5.12.25 slow-wizard submit succeeds.
Companion to groombook/api GRO-2234 (bounded sliding expiration).
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Flea Flicker