- Add refreshKey to useGit queries so dropdown data refreshes on open
- Convert fetchAll from mutation to query with 10-minute refetch interval
- Re-run status query after fetchAll completes via dataUpdatedAt key
- Use placeholderData to keep previous data during key changes
- Remove disabled state from Push, Pull, and Commit menu items
Add new_xplatform_command() helper in yaak-common that creates a
tokio::process::Command with CREATE_NO_WINDOW flag set on Windows.
Also converts git commands to async for consistency.
