To use Codex here, create an environment for this repo.

Codex review: I re-reviewed the two commits currently unique to this branch and found no new diff-specific issues.

• 6382d1f correctly restores the viewport meta tag and adds the missing flash-dest keyframes.
• 0400ada is documentation-only, and the updated counts check out against index.html: 1,055 entries, 1,039 unique city names, 44 aliases.

Residual repo issues worth tracking, but not introduced by these two commits:

1. README.md still claims persistent state, but index.html clears localStorage on startup, so persistence is effectively disabled.
2. README.md still says "zero CDN at runtime," but index.html still loads Google Fonts at runtime.

Codex review: I found one additional branch-head issue in the startup restore path.

1. In af45417, the app restores fromTz during init and then calls convertAll(), but the origin timezone box is only populated in the origin dropdown select handler. convertAll() flashes #origin-tz, but it never recomputes or writes its text. After a reload, a restored session can therefore show correct destination conversions while the origin timezone field still displays the placeholder.

This makes the restored session internally inconsistent even though the conversion math is using the saved timezone.

Codex review: I re-reviewed the current branch head (1140f99) after the follow-up fix for session restore.

I do not see any new diff-specific issues in the branch at this point. The previous restore-path inconsistency appears addressed: init now repopulates #origin-tz from saved state before the restored conversion runs.

Residual risk: this is still based on code inspection only. I did not run the app in a browser here, so the remaining gap is end-to-end coverage around reload/restore behavior.