[BUG] Tabs for chat, cowork and code are missing from Claude desktop app for Mac

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?

When I start the app the tabs for Chat, Cowork and Code. The app is. functioning, it is in chat mode, but I cannot switch to the other modes.
Both Cowork and Code seem to be available in the settings.
I am on a Pro plan.
I restarted the app this morning and it performed an auto update. This may have caused the issue. Yesterday the tabs were still available.
Claude app version 1.2581.0
MacOs Sequoia 15.7.4
MacMini M2Pro

What Should Happen?

Tabs should be available. There is no way to use Cowork now.

Error Messages/Logs

Steps to Reproduce

Open the app on MacMini M2 Pro running MacOs Sequoia 15.7.4
Make sure Claude app is updated to version 1.2581.0

Claude Model

Sonnet (default)

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

1.2581.0

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_