#574 follow-up — @blazmaric flagged that once an admin user is
deactivated, the UI loses every affordance to manage that record.
The deactivate button hides (rightly — they're already deactivated)
but nothing replaces it, leaving the row stranded in the list with
no path to either restore access or permanently remove it.
## Backend
New on `userManagementService`:
- **`activateAdminUser(id, activatedById)`** — symmetric to
`deactivateAdminUser`. Flips `is_active` back to true, logs
`admin_user_activated` activity. Idempotent: already-active target
short-circuits without bumping `updated_at`. No "can't activate
yourself" guard needed (actor is by definition already active).
- **`deleteAdminUser(id, deletedById)`** — hard-deletes the row.
Same self-action and last-super-admin guards as deactivate.
Last-super-admin guard counts ACTIVE super admins excluding the
target — so an already-deactivated super_admin can still be
deleted when an active super_admin remains. FK ON DELETE rules
in core migrations handle the cascade: SET NULL on
`created_by_admin_id` everywhere (events, photos, quotes,
invoices, contracts, customer_accounts, …); CASCADE on the
user's own `api_tokens` + their pending admin / customer
invitations.
New routes on `adminUsers.js`:
- `POST /api/admin/users/:id/activate` — `users.delete` permission
(same tier as deactivate; reverting deactivation is the same
scope of action as performing it).
- `DELETE /api/admin/users/:id` — `users.delete`.
## Frontend
`UserManagementPage.tsx`:
- New mutation hooks: `activateUserMutation`, `deleteUserMutation`.
- The row's action cell now branches on `user.isActive`: active
users see Edit + Deactivate (unchanged); deactivated users see
Edit + Reactivate (`UserCheck` icon, green hover) + Delete
(`Trash2` icon, red hover).
- The shared `ConfirmDialog` handles all four action types
(deactivate / activate / delete / cancelInvitation) via per-type
title / message / confirmText / variant lookup.
`userManagement.service.ts`:
- New `activateUser(id)` and `deleteUser(id)` methods mirroring the
existing `deactivateUser` shape.
i18n keys are added with English fallbacks via `t(key, fallback)`
so the page works on every locale without a missing-translation
warning. Native translations can be filled in via a follow-up.
## Test plan
- [x] 8 new service tests pin: activate happy-path, idempotency on
already-active, NotFoundError on missing target, activity log
emitted, delete self-refusal, last-super-admin guard for both
active and already-deactivated super_admin targets, hard-delete
success, delete activity log.
- [x] Frontend type-check clean.
- [x] Frontend lint clean for the changed files.
- [x] Backend lint clean.
- [ ] Manual: deactivate a user → row now shows Reactivate + Delete
→ reactivate → user can log in again. Then deactivate again →
delete → row vanishes, pending tokens for that user invalidated.
Closes the UX gap blazmaric called out in
https://github.com/the-luap/picpeak/pull/579#issuecomment-... .
Paul Nothaft