fix(admin): pagination, patch tests, and per-page limits

Backend:
- Fix GetAllAdminBookingsHandler and SearchAdminBookingsHandler to
  return totalPages in response
- Auto-record patch tests when booking status progresses to "completed"
- Add GET/POST /api/admin/users/{id}/patch-tests endpoints
  Frontend:
- BookingsCard: proper pagination with 4 per page, prev/next buttons
- UsersCard, BookingCreateModal, WalkInCreateModal: per_page=4 for user
  search
- Add PatchTestModal for manual patch test entry in UserModal
- Hide patch test section when user has no eligible services
  Database:
- Add UNIQUE constraint on user_service_patch_tests(user_id, service_id)

obsidian/Crussell/Crussell Nails.md

@@ -102,7 +102,7 @@
 #### Admin Dashboard (`/admin`)
 - [x] Auth guard with role check
 - [x] ImageUpload component
-- [x] UsersCard + UserModal
+- [x] UsersCard + UserModal + PatchTestModal
 - [x] BookingsCard + BookingModal
 - [x] HolidayHours (exceptional hours management)
 - [x] WeeklySchedule (default hours management)
@@ -120,6 +120,7 @@
 - [x] Customer details form (guest or authenticated)
 - [x] Auth store with token refresh logic
 - [x] **Admin booking flows** - Call-in and walk-in use `/api/services/eligible-for/{user_id}` for user-specific eligibility
+- [x] **Manual patch test entry** - Admin can record patch test completion via User Details → Patch Test modal (for 2-minute walk-in patch tests)
 - [ ] **Customer booking submit** - `submitBooking()` only logs, needs `POST /api/bookings`
 - [ ] Payment integration (Square placeholder)
 
@@ -253,6 +254,8 @@ flowchart TD
 | POST | `/api/admin/bookings/{id}/cancel` | Cancel booking |
 | GET | `/api/admin/users` | List users |
 | GET | `/api/admin/users/{id}` | Get user details |
+| GET | `/api/admin/users/{id}/patch-tests/eligible` | Get services requiring patch test that user hasn't completed |
+| POST | `/api/admin/users/{id}/patch-tests` | Record patch test completion for user |
 | GET | `/api/admin/today/current-next` | Current and next appointment |
 | GET | `/api/admin/today/appointments` | Today's appointments |
 | GET | `/api/admin/today/pending-approvals` | Pending approval queue |
@@ -443,10 +446,11 @@ src/lib/components/
 │   ├── BookingModal.svelte
 │   ├── BookingsCard.svelte
 │   ├── CallInBooking.svelte
-│   ├── HolidayHours.svelte
-│   ├── ImageUpload.svelte
-│   ├── ServicesManagement.svelte
-│   ├── UserModal.svelte
+	│   ├── HolidayHours.svelte
+	│   ├── ImageUpload.svelte
+	│   ├── PatchTestModal.svelte
+	│   ├── ServicesManagement.svelte
+	│   ├── UserModal.svelte
 │   ├── UsersCard.svelte
 │   ├── WalkInBooking.svelte
 │   └── WalkInCreateModal.svelte