- admins and login_attempts tables - cli/create_admin.php: create an admin or reset a password over SSH (no email involved) - includes/auth.php: hardened admin sessions, login throttling (5 failures per IP per 15 minutes) and CSRF helpers - admin/: login, logout and a dashboard showing broadcast status - includes/admin_layout.php: shared admin page layout Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>