[BUG] Dotted background removed from Code tab in Claude Code Desktop app

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?

In the Claude Code desktop app, Claude Chat has a plain background. Claude Cowork has a grid background. Claude Code tab used to have a subtle and beautiful dotted background but now it is removed in the new update for NO reason. Why was the dotted background from Claude Code > Code tab removed?

If Cowork can have a grid background without it being a problem, there's no coherent reason to strip the dotted background from the Claude desktop app, especially when it served a functional purpose (tab identification) on top of being aesthetically nice, subtle and pretty and provided immediate visual context about which tab/surface you were in.

What was lost: The distinct per-surface background (dots for Claude Code tab) that provided immediate visual context about which tab/surface you were in
The inconsistency: Claude Cowork retains its grid background in the same app update cycle, so the removal appears selective rather than principled
The functional impact: Without background differentiation, the tabs feel visually homogeneous, requiring users to rely solely on the tab label for orientation
What I’m asking for: Restore the dotted background, or at minimum provide a setting to re-enable per-surface background patterns

What Should Happen?

The Code tab in Claude Code desktop should have the old dotted background

Error Messages/Logs

Steps to Reproduce

Launch Claude Code desktop app.
Go to Code tab -> No identifying dotted background

Claude Model

Opus

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.1.5749 (ecf3d9)

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

<img width="1202" height="839" alt="Image" src="https://github.com/user-attachments/assets/36fce47c-d6bc-44a2-82cb-1aa7e5c5af29" />