Enter key submits form when using Chinese IME

When using a Chinese IME, pressing Enter to confirm character selection unexpectedly triggers form submission.

Steps to reproduce:

1. Open the form

2. Focus on a text input field

3. Switch input method to Chinese IME

4. Type Chinese characters

5. Press Enter to select a character

Expected result: Pressing Enter should confirm the IME character selection and NOT submit the form.

Actual result: The form is submitted immediately when Enter is pressed.

Environment:

• OS: macOS

• Browser: Edge

• IME: Chinese IME (Traditional)

Notes: This only happens with IME input. English keyboard input works as expected.