test(AchievementsSkeleton): add mouse interactivity tests

[ArchiGajera]

Description

This PR adds a dedicated Vitest test suite for components/dashboard/AchievementsSkeleton.tsx to verify Interactive Tooltips, Cursor Hovers & Touch Event Propagation. The implementation introduces five isolated and deterministic test cases covering hover interactions, tooltip visibility and positioning, click and touch event propagation, interactive cursor styling, and graceful fallback handling when interaction data or tooltip information is unavailable. The production implementation remains unchanged, and the tests are deterministic, CI-friendly, and aligned with the repository's existing testing conventions.

Fixes #7039

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

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.

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[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	3883.44 KB	3883.44 KB	0 B
Total CSS	323.09 KB	323.09 KB	0 B

[Aamod007]

Hey! Thanks for writing interactivity tests for AchievementsSkeleton. Validating touch propagation and hover callbacks ensures our loading states behave correctly while the actual content fetches.

I'm assigning level:beginner, type:testing, and quality:clean.

Looks excellent, approving!

[github-actions]

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

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