- Add appointment_groups table: links multiple appointments from one client visit
- Add group_id FK on appointments (nullable, backward-compatible)
- Add GET/POST/PATCH/DELETE /api/appointment-groups endpoints
- POST creates group record + one appointment per pet atomically (with conflict checks)
- DELETE soft-cancels all appointments in the group
- Add GroupBooking.tsx page at /group-bookings with:
- Dynamic pet-slot form (min 2 pets, each with their own groomer/service/end time)
- Auto-calculates end time from service duration
- Group card list showing all pets, groomers, and statuses side-by-side
- Client filter and cancel-all action
- Wire into nav and routing in App.tsx
- Export AppointmentGroup type; add groupId field to Appointment type
Co-Authored-By: Paperclip <noreply@paperclip.ing>
Groom Book CTO
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