Add daemon web UI, JSON API, and config hot-reload engine
- New: axum web server on port 8090 with htmx dashboard
- New: JSON API endpoints (/api/status, /api/config, /api/bwlimit)
- New: config diff engine with 4-tier change classification
- New: tiered config hot-reload (live/protocol/per-share/global)
- Refactor: supervisor loop uses mpsc command channel (recv_timeout)
- Refactor: supervisor updates shared DaemonStatus every poll cycle
- Dependencies: tokio, axum, askama, tower-http
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
grabbit
ba1cae7f75