v1.0 User Flow Refactoring Delivered: Complete guided user flow from splash to dashboard with auth, device registration, BLE connection, and notifications. Key accomplishments: - Reactive BT monitoring with persistent non-blocking banner - Auth layer (local, backend-ready) with login/session/logout - Serial registration: manual, QR scan, BLE auto-detect - Serial-MAC binding with ownership-based access control - Multi-device chooser with RSSI and auto-connect - BLE connection and HHO error notifications with debounce - End-to-end flow: splash -> login -> register -> scan -> dashboard 10 phases, 18 plans, 33 requirements, 18k LOC Dart. See .planning/MILESTONES.md for full details.