- add sync.go to fetch and prune the selected upstream, github, origin, or sole remote
- fast-forward the current branch with merge --ff-only and inactive branches with update-ref
- protect a dirty current branch and branches checked out in linked worktrees
- warn without changing divergent branches
- delete gone-upstream branches only after confirming they are merged into the remote default branch
- allow dirty repositories by default and retain the all-clean policy behind --strict
- return per-branch results in CLI, JSON, and TUI output
- add bare-remote integration tests, the hub MIT notice, and version 0.3.0
