Optional dev venv (not shipped in release builds)

Use this only for local development when you do not want to run npm run bundle:reticulum (PyInstaller) on every change.

cd electron && npm run bundle:reticulum-venv

That creates venv/ here with pip install rns lxmf. The main process tries frozen resources/reticulum/rnsd first, then this venv.

Release builds use only the frozen binary under resources/reticulum/ — see electron/resources/reticulum/README.md.