🎨 Palette: 프롬프트 복사 버튼 접근성 개선

[seonghobae]

개요 (Overview)

CopyPromptButton 컴포넌트에서 클립보드 복사 시 발생하는 텍스트 변경사항("프롬프트 복사" -> "복사됨")이 시각 장애가 있는 스크린 리더 사용자에게 명확히 전달되지 않는 접근성 문제가 있었습니다. 또한 시각적 효과만을 위한 아이콘들이 스크린 리더에서 불필요하게 읽히는 문제를 개선했습니다.

변경 사항 (Changes)

1. aria-live 적용: 상태가 변하는 텍스트 영역을 <span aria-live="polite">로 감싸 스크린 리더가 버튼 클릭에 따른 "복사됨" 상태 변화를 즉시 부드럽게 읽어주도록 개선했습니다.
2. aria-hidden 적용: 버튼 텍스트가 이미 의미를 전달하므로 시각적 요소인 <Check>와 <Copy> 아이콘에 aria-hidden="true"를 추가하여 스크린 리더가 아이콘 자체를 불필요하게 읽지 않도록 했습니다.
3. 관련 기능이 정상 작동하고 컴포넌트가 안정적으로 렌더링되도록, 100% 테스트 커버리지를 만족하는 테스트(copy-prompt-button.test.tsx)를 추가했습니다.

이 PR은 Palette 역할로서 작은 UX 디테일을 챙겨 전반적인 사용성을 향상시킵니다. 관련 인사이트는 .Jules/palette.md 파일에 기록되었습니다.

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PR created automatically by Jules for task 8004099181052855229 started by @seonghobae

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Reviewing files that changed from the base of the PR and between 4f8796e and 1636e10.

⛔ Files ignored due to path filters (1)

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📒 Files selected for processing (4)

• .Jules/palette.md
• package.json
• packages/web/src/components/copy-prompt-button.test.tsx
• packages/web/src/components/copy-prompt-button.tsx

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