- conftest.py: Include tools.text_editors.vscode in live_gui workspace config
- gui_2.py: Add btn_open_external_editor to _clickable_actions
- test_external_editor_gui.py: Tests for external editor GUI integration
Note: Due to process boundaries (GUI runs in subprocess), full VSCode launch
verification requires manual testing. The test infrastructure verifies config,
command format, and button wiring. Manual verification recommended.
Note: Due to process boundaries (GUI runs in subprocess), monkeypatch doesn't
cross to GUI subprocess. Manual verification requires configuring
config.toml in project root with VSCode path.