- Add /setup route with 4-step wizard: welcome, admin account creation, basic config (port, HTTPS), completion - Router auto-detects first-time setup via GET /admin/setup/status - Redirects to /setup if not configured, blocks /setup after init - Uses Headless UI TransitionRoot for step animations - Password confirmation with mismatch validation Co-Authored-By: Paperclip <noreply@paperclip.ing>