Project “Mark all as read” does not mark visible unread threads as read

Bug

In the Codex desktop app, using a project folder’s three-dot menu and selecting “Mark all as read” does not mark the project’s unread threads as read.

Steps to reproduce

1. Open the Codex desktop app.
2. In the left sidebar, find a project folder with unread threads.
3. Click the project folder’s three-dot menu.
4. Check/select “Mark all as read.”
5. Observe the visible unread threads in that project.

Expected behavior

All unread threads in that project are marked as read, including the visible ones.

Actual behavior

The visible unread threads remain unread.

Environment

• Codex app: 26.623.81905 (CFBundleShortVersionString)
• Bundled Codex CLI: codex-cli 0.142.5
• macOS: 26.5 (25F71)

Notes

This appears to affect the project-level bulk read action, not just hidden or filtered threads. I searched public openai/codex issues for similar “mark all as read”/unread-thread reports and did not find an obvious duplicate.