[BUG] Thought/Thinking for counter is broken

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 we try to use thinking mode with any provider including claude, the thinking for / thought for counter seems to be buggy. It does not reflect the true time it is taking for thinking or it took for the thinking. Instead, everytime you toggle the visibility of the thinking, the counter increments - and this happens across all previous thoughts of the model in current conversation (time in each of the previous thoughts also keeps incrementing everytime you toggle thinking visibility)

What Should Happen?

Thinking for should increment in real time.
Thought for should show true time consumed / spent in thinking mode for a particular tool_call or query.

Error Messages/Logs

Steps to Reproduce

1. Open a new Claude Code session on VSCode
2. Enable thinking mode
3. Send a prompt involving some reasoning effort - observe the thinking dropdown.
4. Toggle the visibility of the thinking process (you will notice that the time for thought keeps incrementing only when you toggle the visibility but it affects all previous thoughts as well)

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.96

Platform

Other

Operating System

macOS

Terminal/Shell

VS Code integrated terminal

Additional Information

https://github.com/user-attachments/assets/73ac0b32-a430-438f-b08c-ad76bcce7ab8