[VS Code] 26.818.61809 regression: history and prompt composer disappear; rollback to 26.818.41705 fixes it

What version of the Codex IDE extension are you using?

Affected: 26.818.61809

Working after rollback: 26.818.41705

Which IDE are you using?

Visual Studio Code

Platform

Linux / Ubuntu 24.04

What issue are you seeing?

After opening a project that I normally use with Codex, the Codex panel no longer displayed any conversation history and did not provide an area/composer to start a new prompt. The extension UI was therefore effectively unusable.

Rolling the Codex extension back from 26.818.61809 to 26.818.41705 immediately restored the normal UI, including the existing history and the prompt composer.

This strongly suggests a regression introduced between those two extension builds rather than lost/corrupted project history.

Steps to reproduce

1. Use Codex in VS Code with an existing project and existing Codex history.
2. Run Codex IDE extension 26.818.61809.
3. Open the usual project/workspace.
4. Open the Codex panel.
5. Observe that conversation history is absent and there is no prompt composer/new-prompt area.
6. Install previous extension version 26.818.41705.
7. Reload/reopen VS Code.
8. Observe that the history and prompt composer are restored.

Expected behavior

The Codex panel should display the existing history and provide the prompt composer normally.

Actual behavior

On 26.818.61809, both the history and prompt composer are missing. Rolling back to 26.818.41705 restores them.

Additional information

I have not deleted or reset ~/.codex; the same local state works correctly with 26.818.41705.

Possibly related to #32388, which reports blank/partially blank Codex panels in earlier VS Code extension versions, but this report captures a specific regression in 26.818.61809 with a confirmed working rollback version.