🎨 Palette: Score 컴포넌트 아이콘 버튼 툴팁 추가 및 접근성 개선

[seonghobae]

💡 What: Score 컴포넌트(ScoreViewer, ScoreView) 내부에 있는 아이콘 전용 버튼(Zoom, Page 변경, Open, Remove)에 마우스 오버 툴팁(title 속성)을 추가하고, 일부 HTML 네이티브 버튼의 disabled 속성을 aria-disabled="true"로 교체하여 비활성 상태에서도 툴팁 접근이 가능하게 수정했습니다.
🎯 Why: 스크린 리더 사용자 뿐만 아니라 마우스 사용자에게도 각 아이콘 버튼이 어떤 역할을 하는지 툴팁으로 명확히 안내하기 위함입니다. 또한 네이티브 disabled는 모든 마우스 이벤트를 막아 툴팁 표시를 불가능하게 하므로 접근성을 개선해야 했습니다. (단, Base UI로 래핑된 커스텀 <Button> 컴포넌트의 disabled prop은 유지했습니다.)
📸 Before/After: 버튼 위에 마우스 호버 시 이제 각 기능(ex. "Zoom out", "Next page", "Open score: ...", "Remove: ...")에 맞는 툴팁이 보여집니다.
♿ Accessibility: 비활성화 상태인 Open Score <button>에서도 키보드 포커스와 툴팁(title) 접근이 차단되지 않도록 aria-disabled="true"와 클릭 시 e.preventDefault()를 적용해 접근성을 향상시켰습니다.

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PR created automatically by Jules for task 11268928124798690824 started by @seonghobae

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Superseded

Closed as superseded by #731. The live #731 head e5c1feb4588e0688aaa62faf77cf599025900215 covers the same score-control tooltip and aria-disabled slice but completes the accessibility contract: guarded activation for both open/remove and pagination controls, aria-describedby linkage to the visible unavailable-state explanation, focus-visible disabled styling, and direct regression tests proving blocked clicks and page-boundary behavior. This branch remains a weaker predecessor and also carries unrelated PDF.js/Undici/package-lock drift plus duplicated .jules notes that #731 deliberately removed. No check or review evidence from this predecessor is transferred to #731.

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📥 Commits

Reviewing files that changed from the base of the PR and between acdbea6 and 478bb17.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (6)

• .jules/palette.md
• apps/desktop/package.json
• apps/desktop/src/features/score/ScoreView.test.tsx
• apps/desktop/src/features/score/ScoreView.tsx
• apps/desktop/src/features/score/ScoreViewer.tsx
• package.json

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