[BUG] Claude application (Chat/Cowork/Code) window size reducing within its app window after idle time.

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?

After an amount of idle time passes and I come back to my laptop, the claude content within the app shrinks into a subset of the window size it had.

<img width="800" height="576" alt="Image" src="https://github.com/user-attachments/assets/28d81fac-9e6c-4bc2-8a7c-d36dab8d77a2" />

Claude for Windows v. 1.8555.0 (8245b7) - not specific to this version, has been happening for the last couple months.
Windows 11 - 24H2 (26100.8390)
running on Surface Laptop 5 - full patched and firmware.

What Should Happen?

The application should maintain it's proportions within the Application window

Error Messages/Logs

If you'd like to debug - please contact me.

Steps to Reproduce

1. Open claude
2. Wait some time
3. Come back to the system and you have the app shrinking within the window per screenshot
4. only way to restore is maximize button, then restore OR restart claude

Claude Model

Opus

Is this a regression?

No, this never worked

Last Working Version

unsure

Claude Code Version

1.8555.0 (8245b7)

Platform

Anthropic API

Operating System

Windows

Terminal/Shell

Windows Terminal

Additional Information

_No response_