a11y: expose EmptyState accessibility metadata

[srushti-panara]

Description

This PR adds accessibility metadata to the EmptyState widget by exposing its title, description, and hint through the accessibility layer. This allows assistive technologies to announce the widget's content without affecting its visual rendering.

Related Issue

Closes #2217

Which package(s)?

@termuijs/widgets

Type of Change

• 🐛 Bug fix (type:bug)
• ✨ Feature (type:feature)
• 📝 Docs (type:docs)
• 🧪 Tests (type:testing)
• ♻️ Refactor (type:refactor)
• 🎨 Design / UX (type:design)
• ♿ Accessibility (type:accessibility)
• ⚡ Performance (type:performance)
• 🔧 DevOps / CI (type:devops)
• 🔒 Security (type:security)

Checklist

• ⭐ You starred the repo. The needs-star check blocks your merge otherwise.
• Tests pass locally: bun vitest run
• Build passes: bun run build
• Typecheck passes: bun run typecheck
• You read CONTRIBUTING.md.
• Your PR title follows type: short description.
• Widget state mutators call markDirty() (if your change affects rendering).
• No new any types without an inline comment explaining why.
• No unrelated refactors bundled into this PR.

GSSoC 2026 Participation

• You are a GSSoC 2026 contributor.
• Your GSSoC profile: https://gssoc.girlscript.org/profile/a80c7e63-fb5a-4d58-aec9-115f9a2798b7

Screenshots / Recordings (UI changes)

N/A (No visual changes)

Notes for the Reviewer

This change is accessibility-only. It introduces semantic metadata for the EmptyState widget by updating accessibility information whenever the title, description, or hint changes. The widget's rendering and behaviour remain unchanged.

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Review details

⚙️ Run configuration

Configuration used: defaults

Review profile: CHILL

Plan: Pro Plus

Run ID: 77cc940d-bfbb-4f00-bc3b-56fdd17f342b

📥 Commits

Reviewing files that changed from the base of the PR and between 65d1f7e and 519a932.

📒 Files selected for processing (1)

• packages/widgets/src/feedback/EmptyState.ts

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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