[BUG] VS Code /model fails with EPERM on Windows: Hebrew username is reversed in config path

Summary

On Windows with a Hebrew (RTL) username, /model in the VS Code extension fails to persist the model choice because the username is string-reversed when the config path is built.

Environment

• Claude Code VS Code extension 2.1.282 (win32-x64)
• Windows 10 Pro 10.0.19045
• Windows username: משתמש (Hebrew, profile folder C:\Users\משתמש)

Steps to reproduce

1. Log in to Windows with a Hebrew username.
2. Open the Claude Code panel in VS Code.
3. Run /model opus (or pick any model).

Actual

Failed to set model: EPERM mkdir 'C:\Users\שמתשמ'

שמתשמ is משתמש with the character order reversed. The extension tries to create a new folder directly under C:\Users, which needs admin rights, so it fails. The model switch still applies in the current session; only the saved preference fails.

Expected

The preference is written under the real profile folder C:\Users\משתמש\.claude.

Workaround

Point the config dir at an ASCII path through a junction:

mklink /J C:\Users\Public\claude-home C:\Users\משתמש\.claude
setx CLAUDE_CONFIG_DIR C:\Users\Public\claude-home

After restarting VS Code, /model works.

Likely cause

Some code path applies a bidi/visual reordering (or reverses RTL runs) to the home directory string before using it as a filesystem path. Paths should be used as logical-order strings only.