IME composition in table cells works correctly in Firefox

현상

In Firefox, Chinese IME composition in table cells works correctly and only confirmed characters appear without duplicate Pinyin.

재현 예시

1. Click on a table cell (<td> element) to focus.
2. macOS Chinese IME is activated.
3. Type Pinyin “nihao” (for Chinese characters “你好”).
4. Press Space to confirm composition.

관찰된 동작

• Correct behavior: Only Chinese “你好” appears, no Pinyin “nihao” visible
• No duplicate text: Pinyin buffer is properly cleared after composition
• Firefox handles table cells correctly: Different from Safari behavior

참고사항

This is a control case demonstrating that the issue is Safari-specific and does not affect Firefox.