[b84330808]

Description

• _handleInputKeydown() now returns early when the keydown belongs to an IME composition: event.isComposing is true, or keyCode is 229.
• Safari sends the Enter that commits the text after compositionend, with keyCode 229. The second check covers it.
• Two tests in js/tests/unit/chips.spec.js dispatch these keydowns. Before the fix they fail with expected [ 'とうきょう' ] to deeply equal [] and expected '' to deeply equal 'とうきょう'. After the fix the chips spec passes.

Motivation & Context

• Chinese, Japanese and Korean users type through an input method. Enter commits the composed text, and Escape cancels it.
• The chips input treats both keys as its own shortcuts. Enter creates a chip from the uncommitted text, for example とうきょう before conversion to 東京. Escape clears the whole input.

Type of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Refactoring (non-breaking change)
• Breaking change (fix or feature that would change existing functionality)

Checklist

• I have read the contributing guidelines
• My code follows the code style of the project (using npm run lint)
• My change introduces changes to the documentation
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests passed

Live previews

• Not applicable, JavaScript only.

Related issues

• None found.

I used Claude Code to write this change.