test(sanitizer): verify Accessibility Standards & Screen Reader Aria Compliance

[jeevitha-14s]

Description

Fixes #4640

Adds isolated accessibility-focused test coverage for lib/svg/sanitizer.ts by introducing lib/svg/sanitizer.accessibility.test.ts.

Changes

• Added 5 accessibility-focused test cases
• Verified accessibility-related attributes and metadata are preserved during sanitization
• Tested accessible labeling behavior and screen-reader compatibility paths
• Validated accessibility-related SVG content remains stable after sanitization
• Added integration-style coverage to ensure sanitizer output remains accessible

Pillar

• 🎨 Pillar 1 — New Theme Design
• 📐 Pillar 2 — Geometric SVG Improvement
• 🕐 Pillar 3 — Timezone Logic Optimization
• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

No visual UI changes. This PR adds automated accessibility-focused test coverage only.

Checklist before requesting a review

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally.
• I have run npm run format and npm run lint locally.
• My commits follow the Conventional Commits format.
• I have updated README.md if I added a new theme or URL parameter.
• I have starred the repo.
• I have made sure that I have only one commit to merge in this PR.
• The SVG output matches the CommitPulse "premium quality" aesthetic standard.
• (Recommended) I joined the CommitPulse Discord community.

[vercel]

@jeevitha-14s is attempting to deploy a commit to the jhasourav07's projects Team on Vercel.

A member of the Team first needs to authorize it.