[BUG] [VS Code Panel] Scroll does not work in conversation area — input box retains permanent focus

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?

## Description
In the Claude Code VS Code panel, the conversation area cannot be scrolled using the touchpad or mouse wheel. The input box appears to retain permanent focus, intercepting all
scroll events even after clicking on the conversation area.

## Actual behavior

• Scroll always affects the input box (navigates command history)
• Clicking on the conversation area does not transfer focus away from the input box
• No scrollbar is visible in the conversation panel

## Environment

• OS: Windows 11 with WSL2
• VS Code with Claude Code extension
• Terminal: WSL2 Ubuntu

What Should Happen?

Scrolling over the conversation area should scroll through the message history.

Error Messages/Logs

Steps to Reproduce

1. Open Claude Code in VS Code panel ("claudeCode.preferredLocation": "panel")
2. Have a long conversation with multiple messages
3. Try to scroll up in the conversation area by moving the cursor over the messages and scrolling with the touchpad or mouse wheel
4. Scroll events go to the input box instead of the conversation

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

_No response_

Claude Code Version

2.1.178

Platform

Anthropic API

Operating System

macOS

Terminal/Shell

Terminal.app (macOS)

Additional Information

_No response_