- Add src/auth.ts for interactive QR code authentication
- Add `npm run auth` script
- Update setup skill for current Node.js architecture
- Daemon (src/index.ts) now only uses stored credentials
Auth is run during setup; daemon assumes credentials exist and
shows macOS notification if re-auth is needed.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
