Enhance API Route Error Resilience: Hydration Stability & Exception Safety Tests

[Rakshak05]

Description

Fixes #6778

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 introduces background API route error-resilience unit and integration tests)

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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[retenta-bot]

This pull request addresses issue #6778 by adding tests for error resilience in the API route. It aligns with previous decisions made to enhance user experience and code quality, such as fixing theme rendering based on system preferences and removing dead code in the calculateStreak function. These improvements contribute to a more robust application. Thank you for your contributions!

[Aamod007]

Hey @Rakshak05! Thanks for adding these error resilience tests for the PR Insights API route.

I have placed the status:blocked label on this PR due to the failing Format · Lint · Typecheck · Test CI pipeline.

Required Actions:

• Fix the test or linting failures locally.
• Push the updates to this branch.
• Ensure the CI pipeline turns green.

Once the pipeline is passing, I'll take another look!

Labels Assigned:

• level:intermediate: Solid tests for rate limiters, abort errors, and internal exceptions.
• quality:clean
• type:testing
• mentor:Aamod007

[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	3975.85 KB	3975.85 KB	0 B
Total CSS	331.16 KB	331.16 KB	0 B