Update readme

obsidian/Crussell/Crussell Nails.md

@@ -36,9 +36,12 @@
 - [x] `/api/admin/users` - List, view with booking history
 - [x] `/api/admin/today` - Current/next appointment, today's appointments, pending approvals
 - [x] `/api/admin/notifications` - GET/acknowledge endpoint wired, but:
+  - [x] **Pending notification acknowledgment** - Acknowledged on confirm/cancel (not deleted)
+  - [x] **Cancelled booking notification** - Created when cancelling non-pending bookings
   - [ ] Frontend UI to display notifications
   - [ ] Push mechanism (currently only pull-based)
   - [ ] User notifications (only admin notifications exist)
+  - [ ] User notification preferences (DB table ready)
 
 #### Scheduling System
 - [x] `/api/scheduling/default-hours` - GET public, PUT admin
@@ -284,6 +287,7 @@ admin_notification_reason: pending_booking | cancelled_booking | rescheduled_boo
 | `payments` | Payment transactions |
 | `business_settings` | Business configuration |
 | `admin_notifications` | Admin notification queue |
+| `user_notification_preferences` | User notification preferences (email/sms/push) |
 
 ### Key Functions
 
@@ -325,6 +329,7 @@ admin_notification_reason: pending_booking | cancelled_booking | rescheduled_boo
 |------|-------------|
 | **Notifications UI** | Frontend panel to display admin notifications |
 | **Notifications push** | Real-time notification mechanism (WebSocket/polling) |
+| **User notification preferences** | [x] DB table ready, waiting on user notification system |
 | **User notifications** | Notification system for regular users (booking confirmations, reminders) |
 | **Remove debug logs** | `console.log` in BookingFlow.svelte:600 and BookingCreateModal.svelte:224 |
 | **S3/R2 image hosting** | Portfolio image storage with admin upload |
@@ -432,6 +437,8 @@ src/lib/components/
 - **GDPR functions exist in SQL** (`anonymize_user`, `export_all_user_data`, `delete_guest_user`) but only `DELETE /api/user/account` is wired - need user data export and admin tax export endpoints
 - **Debug console.logs** in `BookingFlow.svelte:600` and `BookingCreateModal.svelte:224` should be removed before production
 - **Notifications** are pull-based only (no push/WebSocket). Admin endpoint exists but no frontend UI. No user-facing notification system yet.
+- **Notification acknowledgment**: When a booking is confirmed, any pending notification is acknowledged. When cancelled, pending is acknowledged and cancelled_booking notification is only created if the booking was not in pending status (e.g. was confirmed or in_progress).
+- **User notification preferences**: `user_notification_preferences` table exists with email/sms/push enabled flags, waiting on user notification system to be implemented.
 
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