IME candidate window shows at bottom-right corner instead of caret position (Windows CMD)

Describe the bug

After updating to Claude Code v2.1.153, when typing Chinese/IME text in CMD (Windows command prompt), the IME candidate window appears at the bottom-right corner of the terminal instead of next to the input caret. This makes typing very uncomfortable.

The changelog mentions a fix: "Fixed the IME candidate window appearing at the bottom of the screen instead of next to the input caret in attached background sessions on Windows" — but this issue happens in the normal interactive session, not just background sessions.

Environment

• OS: Windows 11 Home China (10.0.26100)
• Claude Code version: 2.1.153
• Terminal: CMD (Windows built-in command prompt)
• Shell: PowerShell
• Input method: Chinese IME (Windows built-in)

Steps to reproduce

1. Open CMD on Windows 11
2. Launch Claude Code (claude)
3. Switch to a Chinese IME
4. Start typing — the IME candidate window appears at the bottom-right corner instead of near the cursor

Expected behavior

IME candidate window should appear directly above/next to the input caret (cursor position).

Actual behavior

IME candidate window appears at the bottom-right corner of the terminal window.

Additional context

This may be a regression or the previous fix (for background sessions) needs to be extended to cover normal interactive mode as well.