- New /super-admin/login and /super-admin routes with separate auth
- Super admin can view all registered accounts and impersonate any user
- Impersonation banner shows at top of screen with exit button
- ADMIN_USERNAME and ADMIN_PASSWORD config added to .env and docker-compose.yml
- Fixed auth store: export setToken, clearToken, and setUser so they are
accessible from superAdmin store
- Updated README with super admin feature, new env vars, and setup notes
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
