@ autocomplete menu option highlight is invisible in the VSCode extension when using a light theme

What version of Codex is running?

0.57.0

What subscription do you have?

ChatGPT Plus

Which model were you using?

_No response_

What platform is your computer?

Darwin 25.1.0 arm64 arm

What issue are you seeing?

In the VS Code extension, the @ auto-completion menu highlight is not visible in light themes.

<img width="950" height="752" alt="Image" src="https://github.com/user-attachments/assets/6264218a-89c2-434f-b7f6-faa57ba788ef" />

What steps can reproduce the bug?

1. Open the VS Code extension.
2. Start adding context by typing @ and a few letters to open the menu.

What is the expected behavior?

Seeing a distinguishable highlight.

Additional information

Extension version: 0.5.7