- contrib/linux/Dockerfile: add libpython3.11 + PyInstaller to build
standalone cli binary; fix venv isolation via .dockerignore
- frontend/electron/main.cjs: use bundled cli binary in prod via
process.resourcesPath, fallback to venv/python3 in dev
- frontend/package.json: add extraResources for cli binary,
set output dir to release/
- frontend/vite.config.js: set base './' for file:// protocol in prod
- .dockerignore: exclude venv/, node_modules/, dist/, .git/
- .gitignore: ignore release/ output directories
