Clean up repo table pagination display

[wazeerc]

What changed

• Extracts pagination state pageIndex, pageSize, pageCount into local variables for cleaner rendering logic.
• Removes hardcoded magic number 10 and improves readability.

Checklist

• Tested locally (cd frontend && npm run dev)
• npm run build passes (for frontend changes)
• python -m pytest passes (for methodology changes)

### If this changes the methodology:

- [ ] Discussed in an Issue or Discussion first
- [ ] Updated frontend/src/app/methodology/page.tsx to match
- [ ] Updated methodology tests and fixtures

[vercel]

@wazeerc is attempting to deploy a commit to the Red River West Team on Vercel.

A member of the Team first needs to authorize it.

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Actions	Updated (UTC)
oss-index-supabase-commit	Ready	Preview, Comment	May 13, 2026 8:09am

[alessandro-ciffo]

Thanks for the cleanup, @wazeerc!

(The earlier Security failure was unrelated. New Next.js + fast-uri advisories landed right before your run. Fixed on main and now passing here)