Continues Codex's paused in-progress fix in this worktree (confirmed
safe to pick up by the human product owner). A missing or malformed
branch commit timestamp no longer fails the whole branch page; the
latest-branch picker now filters to branches with a known timestamp
before selecting the max, and reports Failed (not Empty) when none
are known. Adds the one missing test case from the in-progress
coverage (all branches with unknown timestamps) plus an explicit
test proving the reference screen never depended on the field.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
choiminyeong
b46dd3a72b