[BUG] VSCode integrated terminal cannot detect 'code' command - IDE connection fails (Windows)

Bug Description

When running Claude Code from VSCode's integrated terminal on Windows, the IDE detection fails with error:

'code' is not recognized as an internal or external command, operable program or batch file.

However, running Claude Code from an external terminal (Windows Terminal/CMD) works correctly and can detect/connect to VSCode.

Environment

• Claude Code version: 2.0.62
• OS: Windows 11
• VSCode version: 1.106.3
• Terminal: VSCode integrated terminal (PowerShell/bash)
• Claude Code Extension: anthropic.claude-code (installed and enabled)

Steps to Reproduce

1. Open VSCode with a project folder
2. Open VSCode's integrated terminal
3. Run claude
4. Run /ide or check Status page

Expected: IDE should be detected and connected
Actual: Error message "'code' is not recognized as an internal or external command"

Workaround

Running Claude Code from an external Windows Terminal works:

cd C:\path\to\project
claude
/ide  # Successfully detects VSCode

Additional Context

• The code command works fine when run directly in the same VSCode integrated terminal
• The VSCode extension is properly installed and functional
• This appears to be a regression - similar issue was reported in #3492 (for version 1.0.51) but marked as closed
• The IDE lock file at ~/.claude/ide/*.lock shows correct VSCode detection when connected from external terminal

Diagnostic Info

From /status in VSCode integrated terminal:

IDE: ✘ Error installing VS Code extension: 1: 1 'code' is not recognized as an internal or external command,
      operable program or batch file.
      Please restart your IDE and try again.

From external terminal (working):

IDE lock file content:
{"pid":12484,"workspaceFolders":["c:\Users\..."],"ideName":"Visual Studio Code","transport":"ws","runningInWindows":true,"authToken":"..."}

🤖 Generated with Claude Code