What happened?

When running Pi in WSL with a repository stored on a Windows-backed path such as /mnt/c/..., the footer branch label remains stuck on an old branch after switching branches. Git reports the correct branch via git branch --show-current and git status.

I have a branch with a narrowly-scoped fix ready and would be happy to open a PR if a maintainer says lgtm.

The fix I tested keeps the existing watcher behavior but adds a narrowly scoped watchFile() polling fallback for .git/HEAD only if Pi is running in WSL and the repo root is under /mnt/<drive>/...

Steps to reproduce

1. Run Pi in WSL from a /mnt/c/... repo.
2. Switch branches, for example:

!git switch some-branch
!git switch main

Expected behavior

The footer branch label should update to match the current Git branch.

Version

0.75.5