Mood: 😔
Category: Bugs

Bug: IME composition Enter key triggers form submission in freeform input

When using the ask_user tool's freeform text input (the field below multiple-choice options), pressing Enter to confirm IME (Input Method Editor) composition (e.g., converting Japanese hiragana to kanji) inadvertently submits the form.

Steps to reproduce:

Agent presents a multiple-choice question with freeform input enabled
Click the freeform text field and begin typing in Japanese (or any CJK language)
While the IME candidate window is open, press Enter to confirm the character conversion
Expected: The Enter key confirms the IME composition without submitting the form.

Actual: The form is submitted immediately with incomplete text (only the portion typed before the composition confirmation).

Suggested fix: Check KeyboardEvent.isComposing or listen for compositionend events and suppress form submission while IME composition is active.

Environment: macOS, Japanese IME