Replace the external hub sync dependency with an attributed internal implementation that fetches and updates branches independently. Allow dirty repositories while protecting affected checked-out branches, retain all-clean strict mode, add real-remote safety tests, and update the CLI, TUI, JSON output, version, and documentation.
Replace Unix-only hub test fixtures with a cross-platform helper executable. Document Windows installation and usage, and ignore the generated .exe artifact while retaining Linux build guidance.
LyAhn
