test: add TypeScript compiler validation tests for github api route (…

[adityapandey4621]

Description

Fixes #6767

I've added the required isolated tests for TypeScript compiler validation and schema constraints on the GitHub API route (app/api/github/route.ts). This ensures our type declarations and API schemas remain strictly enforced and safe from regressions.

Specifically, I:

• Created app/api/github/route.type-compiler.test.ts with 5 target test cases.
• Used expectTypeOf to ensure our inferred output properties exactly match the expected data types.
• Tested the Zod z.input schemas to guarantee that passing invalid types is properly blocked during static type checking.
• Verified that custom types correctly handle optional values without throwing compile errors.
• Checked schema validation constraints by passing invalid data to ensure it returns the exact, strict validation error messages.
• Enforced static typing on the GET route handler to ensure it properly accepts a Request and resolves to a Response.

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 is a backend testing and TypeScript infrastructure PR)

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

[Aamod007]

Hey! Thanks for adding TypeScript compiler tests for the GitHub API schemas. Using expectTypeOf explicitly on the Zod inferred types prevents schema mismatches from silently breaking production.

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

Solid, approving!

[github-actions]

🎉 Congratulations @adityapandey4621! Your PR has been successfully merged. 🚀

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