New admin route /admin/users with two sections:
- Accounts — table of all users (username, optional display name,
admin badge, created_at). Per-row "Make admin" / "Remove admin"
button calls PUT /api/admin/users/{id}/admin. Last-admin guard
surfaces as a toast ("Can't remove the last admin — promote
someone else first").
- Invites — list of active invites with Copy + Revoke per row.
"Generate invite" button creates a 24h token. Operator shares
the token with the invitee, who enters it on /register.
AdminTabs gains a "Users" tab (5 tabs total). New typed client
functions in admin.ts (listUsers, updateUserAdmin, listInvites,
createInvite, deleteInvite) plus query factory functions
createAdminUsersQuery / createAdminInvitesQuery and query keys
qk.adminUsers / qk.adminInvites.
Tests cover: list rendering, admin badge, promote/demote actions,
last-admin guard toast, invite generation, revoke flow, empty states.
AdminTabs.test.ts updated to assert 5 tabs and Users active state.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
bvandeusen
97d4dce7ee