Input onChange trigger two times when input Chinese

[SocietyNiu]

As the figure shown, when input Chinese, onChange will trigger two times even input the single char.

This issue will cause relevant component issue like Ant-Mentions

This issue should be avoided, and the same issue has been resolved before with rc-input. Issue 46587 https://github.com/react-component/input/pull/61

[coderabbitai[bot]]

A summary of the changes CodeRabbit can apply:

• Add a guard in src/TextArea.tsx to call triggerChange only when compositionRef.current is false (preventing onChange during IME composition) and add tests in tests/ime-composition.test.tsx to verify single onChange on Chinese IME input, normal input behavior, repeated compositions, and maxlength enforcement.

• Add composition-aware change handling to src/TextArea.tsx (wrap triggerChange to skip calls while compositionRef.current is true) and introduce tests/tests for IME behavior by adding tests/ime-composition.test.tsx with unit tests ensuring onChange is suppressed during composition, fires once after composition end, handles multiple compositions, normal typing, and maxLength application after composition.

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