Keep thread name in sync across CLI and app

Summary

When I rename a conversation in Codex CLI, the corresponding conversation title in Codex for macOS does not update. This causes title mismatch across surfaces.

Environment

• Date observed: 2026-03-04
• Codex CLI: codex-cli 0.107.0
• Codex macOS app: 26.303.1606
• Same OpenAI account used in both CLI and app

Steps to reproduce

1. Start a new conversation in Codex CLI.
2. Rename it in CLI.
3. Open Codex macOS app and locate the same conversation.

Actual behavior

The title shown in the macOS app remains unchanged (old title).

Expected behavior

Either:

• titles stay consistent across CLI and macOS app, or
• docs/UI clearly state that CLI and app titles are separate and not synced.

Impact

• Harder to find the right conversation after switching surfaces.
• Increased navigation mistakes when many conversations have similar names.

Notes

Official docs use different terms (session in CLI, thread in app). It would help to document cross-surface title sync behavior explicitly.