test(code-block-error-resilience): verify Hydration Stability, Exception Safety & Error Fallbacks

[anshika1179]

Description

Fixes #6903

This PR implements the missing error resilience test coverage for the app/documentation/code-block.tsx component, verifying Hydration Stability, Exception Safety & Error Fallbacks as specified in the issue. The tests confirm that:

• Runtime exceptions in nested components are correctly caught by the Error Boundary.
• Exceptions are logged to telemetry trackers correctly.
• A clean error recovery UI renders instead of crashing the site.
• The reset/reload path works successfully on the recovery panel.
• The clipboard API rejection error is gracefully caught and handled without crashing.

Pillar

• 🛠️ Other (Bug fix, refactoring, docs)

Visual Preview

N/A (Test addition)

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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📦 Next.js Bundle Size Report (Gzipped Sizes)

✨ No significant bundle size changes detected.

📊 Summary of Totals

Category	PR Size	Base Size	Difference
Total JS	3917.41 KB	3917.41 KB	0 B
Total CSS	325.86 KB	325.86 KB	0 B