test(sanitizer-accessibility): add tests for Accessibility Standards & Aria Compliance (#4640)

[diksha78dev]

Description

Fixes #4640

Added lib/svg/sanitizer.accessibility.test.ts to satisfy the accessibility & aria compliance testing requirements for the sanitizer.ts utility. Included 5 passing unit tests specifically verifying safe fallback colors, animation speed boundaries, contrast luminance logic, XML script escaping, and external Google Font URL sanitization.

Pillar

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

Visual Preview

N/A (This PR only adds unit tests for a background utility, no visual changes).

Checklist before requesting a review:

• I have read the CONTRIBUTING.md file.
• I have tested these changes locally (localhost:3000/api/streak?user=YOUR_USERNAME).
• I have run npm run format and npm run lint locally and resolved all errors (CI will fail otherwise).
• My commits follow the Conventional Commits format (e.g., feat(themes): ..., fix(calculate): ...).
• I have updated README.md if I added a new theme or URL parameter.
• I have started 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 (no raw elements, smooth animations, correct fonts).
• (Recommended) I joined the CommitPulse Discord community for contributor discussions, mentorship, and faster PR support.

[github-actions]

📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	3697.00 KB	3697.00 KB	0 B
Total CSS	296.58 KB	296.58 KB	0 B

[Aamod-Dev]

Adding explicit accessibility tests in lib/svg/sanitizer.accessibility.test.ts is a great way to ensure our utilities maintain compliance. Testing fallback colors, animation boundaries, and luminance calculations ensures the visual accessibility of the generated SVGs won't regress. Approved!

[github-actions]

🎉 Congratulations @diksha78dev! Your PR has been successfully merged. 🚀

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