Docs/render open api link

[Unclebaffa]

Summary of Completed Work

1. Page Update:

   • Modified src/app/docs/page.tsx to validate the OpenAPI and GitHub external links through safeHref.
   • Applied secure target="_blank" and rel="noopener noreferrer" attributes on the external GitHub link.
   • Handled fallbacks by rendering the links as plain text if validation fails.

2. Tests:

   • Updated assertions in src/app/docs/page.test.tsx to verify correct target and rel attribute handling on both links.
   • Added comprehensive tests for validation failure cases using jest.spyOn() to mock safeHref without causing recursion issues.
   • Verified that the page maintains 100% test coverage.

3. Documentation:

   • Updated the Link safety convention section in README.md to note that /docs links are validated through safeHref.

4. Commits:

   • Committed all changes in 4 separate, clean commits:
     • feat(docs): route relative and external links through safeHref and secure external link
     • test(docs): assert target and rel attributes for docs links
     • test(docs): add test coverage for docs link safety validation fallback
     • docs(README): document link safety validation on the docs page

5. Validation & Verification:

   • Ran npm run lint, npm run typecheck, npm test (coverage), and npm run build successfully with zero errors.

For more details, please see the implementation_plan.md and walkthrough.md artifacts.

Closes #143