Probe modern pipx homes, buffer install stdout for JSON, and clean up
failed venv creates so Install Markitdown retries reliably.
Co-authored-by: Cursor <cursoragent@cursor.com>
Probe versioned Homebrew Pythons and pipx venvs, and install into a
plugin-local .venv so PEP 668 no longer blocks the Install button.
Co-authored-by: Cursor <cursoragent@cursor.com>
## Summary
- **Security**: Replaced shell injection-vulnerable `exec()` calls with `spawn()` using argument arrays and `shell: false`, bundling Python wrapper scripts that use `argparse`
- **Architecture**: Decomposed monolithic 735-line `main.ts` into 12 focused modules across `src/` and `python/`
- **Features**: Added image extraction from PDFs, plugin arguments editor, context menu conversion, batch progress indicators, setup wizard, and Unicode support via `PYTHONUTF8=1`
- **Compatibility**: Reverted minAppVersion to 0.15.0, python3 fallback for macOS/Linux
Closes ENG-533
