Layout misalignment and ANSI escape code leaks during Chinese streaming output in JetBrains Terminal

What version of Codex CLI is running?

v0.131.0

What subscription do you have?

Pro

Which model were you using?

gpt-5.5 high

What platform is your computer?

Microsoft Windows 11

What terminal emulator and version are you using (if applicable)?

_No response_

Codex doctor report

What issue are you seeing?

<img width="970" height="519" alt="Image" src="https://github.com/user-attachments/assets/607462ac-bdef-47e9-b4a4-4f0e3f394197" />

<img width="975" height="465" alt="Image" src="https://github.com/user-attachments/assets/19805fb7-9eea-4eaa-a52c-d07fd140d9d1" />

What steps can reproduce the bug?

1. Open a JetBrains IDE (e.g., PyCharm, WebStorm) on Windows.
2. Open the built-in terminal utilizing the "Reworked 2025" engine with PowerShell.
3. Launch codex.
4. Send a prompt that requests a response in Chinese (e.g., "AI 新闻").
5. Observe the character overlap and leaked ANSI codes during active text streaming.

What is the expected behavior?

_No response_

Additional information

_No response_