fix: Prevent duplicate keydown triggers during IME composition causing duplicate options in Creatable

[phungquan27-05]

Summary

Fixes an issue where pressing Enter to confirm IME composition (e.g. Vietnamese, Japanese on macOS) triggers Enter actions twice or prematurely executes props.onKeyDown.

This issue is especially noticeable in Creatable inputs: when users press Enter to finish IME composition and create a new option, the component may process the same Enter event twice, resulting in two identical options being created instead of one.

What changed

• Added an early return at the beginning of onKeyDown when event.nativeEvent.isComposing or event.keyCode === 229.

• Prevents composition keydown events from leaking into the onKeyDown callback prop and internal select handlers.

• Ensures that Enter pressed during IME composition is ignored until composition is fully completed, preventing duplicate option creation and unintended key handling.

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🦋 Changeset detected

Latest commit: e9a6e6a

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
react-select	Patch

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