[BUG] Statusline symbols get rendered in the message stream

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Status line elements get rendered in the message itself.

<img width="752" height="918" alt="Image" src="https://github.com/user-attachments/assets/b170910a-c1bc-4f87-b917-b9e3ff8264f8" />

What Should Happen?

Icons / letters from the status line should not be displayed out of the status line.

Error Messages/Logs

Steps to Reproduce

1. Use this status line https://github.com/0xAndoroid/dotfiles/blob/main/claude/statusline.sh
2. Observe the messages

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.14

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Other

Additional Information

Terminal being used is Ghostty, with Zellij