Address three integration gaps found in review:
- Bind ~/.gitconfig read-only in the sandbox base layer so `git commit`
finds user.name/email inside the jail (spec §3).
- Bind a worktree session's repo common .git dir writable: the worktree's
real gitdir lives at <repo>/.git/worktrees/<branch>, outside the bound
cwd, so git was broken in sandboxed worktree sessions.
- doctor now gates on sandbox.is_available() (the single source of truth
shared with the New Session dialog) rather than a raw shutil.which, so
it agrees with the service on non-Linux platforms (spec §6).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Adds a non-fatal bubblewrap check to the doctor command that reports whether
the bwrap binary is available. This is necessary for sandboxed sessions and
the check is displayed alongside other system requirement checks.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
felixm