- Add electron-updater dependency and implement native desktop integration utilities for dialogs, notifications, auto-update wiring, and window state persistence
- Add fusion:// deep-link protocol registration, URL parsing, single-instance handlers, and renderer event forwarding for task/project routes
- Add comprehensive Vitest coverage for native integrations and deep-link handling across success, edge, and failure cases
- Document native and deep-link API contracts, behavior, and usage details in the desktop package README
