- Add GET /api/wheel/download to serve/server.py and edit/server.py:
serves dist/bincio-*.whl via FileResponse; in production nginx takes
the request before FastAPI, so this is a no-op there but works locally
- wheel_version response now includes api_url: "/api/wheel/download"
alongside the nginx-served url field
- Bundle mobile/assets/bincio.whl (built from dist/) as an offline
fallback for Pyodide testing before the first instance sync
- docs/mobile-app.md: document dev setup — bundled asset, local server
endpoint, and how to refresh the bundle with uv build + cp