🎨 Palette: Improve accessibility of OverviewStats collapsible section

[seonghobae]

💡 What

Improved the accessibility of the "What do these numbers mean?" collapsible section in the OverviewStats component.

🎯 Why

Previously, the toggle button was not semantically linked to the content it expanded, meaning screen reader users wouldn't be notified of the state change or know what the button controlled. Additionally, visual-only text like the chevron and "click to expand" added unnecessary noise.

📸 Before/After

No visual changes. This is purely a markup and accessibility enhancement.

♿ Accessibility

• Associated the toggle button with the expanded content using aria-controls and a unique generated ID using React's useId.
• Added aria-expanded to the button to broadcast its current state to screen readers.
• Added aria-hidden="true" to the decorative chevron and the instructional "click to expand" text, reducing cognitive load and screen reader noise, as the state is already communicated via aria-expanded.

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PR created automatically by Jules for task 967931238919940402 started by @seonghobae

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 83079da3-4f1d-44be-b069-7b6d11cdfb34

📥 Commits

Reviewing files that changed from the base of the PR and between cdf4ce8 and c6220c5.

📒 Files selected for processing (2)

• .Jules/palette.md
• packages/web/src/components/dashboard/overview-stats.tsx

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch palette/overview-stats-accessibility-967931238919940402

✨ Simplify code

• Create PR with simplified code
• Commit simplified code in branch palette/overview-stats-accessibility-967931238919940402

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[seonghobae]

최신 upstream/main 기준으로 이 PR은 81개 파일의 stale diff를 포함합니다. 특히 .claude agent/skill 파일 삭제와 오래된 워크플로우/lockfile/env 변경이 섞여 있어 그대로 유지하거나 upstream에 올리면 이미 반영된 변경을 되돌릴 위험이 큽니다.

현재 큐는 upstream #30 → upstream #21 순서로 정리 중입니다. 이 PR의 아이디어가 여전히 필요하면 최신 upstream/main에서 단일 목적 브랜치로 깨끗하게 다시 추출하겠습니다. stale PR로 닫습니다.

[google-labs-jules]

최신 upstream/main 기준으로 이 PR은 81개 파일의 stale diff를 포함합니다. 특히 .claude agent/skill 파일 삭제와 오래된 워크플로우/lockfile/env 변경이 섞여 있어 그대로 유지하거나 upstream에 올리면 이미 반영된 변경을 되돌릴 위험이 큽니다.

현재 큐는 upstream #30 → upstream #21 순서로 정리 중입니다. 이 PR의 아이디어가 여전히 필요하면 최신 upstream/main에서 단일 목적 브랜치로 깨끗하게 다시 추출하겠습니다. stale PR로 닫습니다.

Understood. Acknowledging that this work is now obsolete and stopping work on this task.