IME composition React open

rc-select: the Enter that confirms IME composition also selects an option

Enter that confirms an IME composition also selects the active option

Symptom

The Enter used to commit an IME composition also selects the currently highlighted option in a searchable Select.

Minimal repro

1. Open a searchable <Select>.
2. Type a CJK query with the IME and press Enter to confirm the conversion.
3. The active option is selected with the unfinished query.

Fix

Track composition state (compositionstart/compositionend) and skip option selection while composing.

Fix PR → #rc-select-enter-ime-option