Extends AdminUsersController (build-only since slice 2) with setAdmin,
setAutoApprove, delete, resetPassword. is_admin/auto_approve toggles
optimistically swap the row and roll back on server error (including
the last-admin guard 4xx). resetPassword is admin-supplied; no
auto-generation mode exists server-side.
Adds AdminInvitesController + adminInvitesProvider with create
(prepends new invite to the list, returns it for the copy-once
dialog) and revoke (optimistic remove + rollback).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>