When sync.branch is set to the current branch (e.g., main), bd sync
now commits directly instead of failing with a worktree error.
Changes:
- sync.go: Detect when current branch == sync branch and skip worktree
- sync.go: Show appropriate messages for direct-mode commits/pulls
- doctor.go: Change from Error to OK status when on sync branch
The fix allows users to work directly on the sync branch without
having to switch to a different branch for bd sync to work.
Closes: GH#519
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
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