Service-booking mode now selects services by section like slot mode:
appointment-booking-services returns service_section per item; ServiceSlotPicker
groups by section (SearchableSelect), accumulates picks across sections into a
removable 'section -> service' chip list.
Secretaries can override a service's duration for a single appointment without
changing the service default: appointment-service-slots accepts durations[uuid]
and both create endpoints accept service_durations; the override drives total
duration and slot_end. Online (patient) booking is unaffected — it never sends
overrides. Backend + frontend tests and docs updated.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
