Aaron Soules 2d05e87281 fix(coding-agent): handle reftable footer branch detection (#2300) ...

* fix(coding-agent): handle reftable footer branch detection

- Fall back to git commands when HEAD contains refs/heads/.invalid
- Treat unresolved .invalid as detached instead of showing literal .invalid
- Watch reftable directory for branch change updates
- Resolve commonGitDir for worktree setups

fixes #2123

* fix(coding-agent): improve reftable branch detection and reduce false-positive rerenders

- Re-resolve branch on watcher events instead of invalidating cache;
  only notify listeners when the branch string actually changed
- Add regression tests: regular repo fast path (no spawnSync), nested
  cwd upward walk, unchanged-branch reftable churn suppression

2026-03-17 15:33:33 +01:00

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