Japanese IME input renders outside text input area in IDE integrated terminals

Environment:

• Claude Code version: v2.0.74
• OS: Windows
• Affected: IDE integrated terminals (AntiGravity, Cursor, etc.)
• Not affected: Windows Terminal + PowerShell 7

Description:
When typing Japanese text using IME in IDE integrated terminals, the input characters and IME candidate window appear at the bottom-right corner of the screen, far from the text input area.

In Windows Terminal + PowerShell 7, IME input correctly appears below the text input area.

Steps to reproduce:

1. Open Claude Code in an IDE integrated terminal (e.g., AntiGravity, Cursor)
2. Start typing Japanese text using IME
3. Observe that the input text appears at the bottom-right corner of the screen

Expected behavior:
IME input and candidate window should appear near the text input area (like in Windows Terminal).

Actual behavior:
IME input and candidate window appear at bottom-right corner of the screen in IDE integrated terminals.

Screenshot:

<img width="939" height="950" alt="Image" src="https://github.com/user-attachments/assets/cecf8258-1dd5-45d0-9b68-660af3f339ad" />