* Add PR number segment to status bar
Add a new 'pr' status line segment that shows the GitHub PR number
(e.g., #1234) as a clickable OSC 8 hyperlink when the current branch
has an associated pull request.
- Async lookup via 'gh pr view', cached per branch
- Invalidates on branch change via .git/HEAD watcher
- Falls back to hidden segment when no PR exists or gh unavailable
- Supports all theme presets (unicode, nerd font, ascii)
- Added to all preset layouts after the git segment
* Skip PR lookup on default branch, resolve dynamically
* Extract git-utils, add tests for parseGitHubRepo and parseDefaultBranch
* Fix PR lookup race condition, invalidation churn, and dotted repo names
- Guard #cachedPr writes against branch change during in-flight lookup
- Stop clearing PR cache in invalidate() (only .git/HEAD watcher should)
- Allow dots in GitHub repo names in parseGitHubRepo regex
* Simplify PR lookup: use gh pr view, try upstream/HEAD for default branch
- Replace gh pr list --head with gh pr view (requires gh repo set-default)
- Remove manual remote URL resolution — gh handles it
- Default branch detection falls back to upstream/HEAD when origin/HEAD is unset
Kevin Loftis
5ee80f3a36