Preview: Update quantecon-book-theme to PR #335

[mmcky]

Overview

This PR tests the preview of the modernized from QuantEcon/quantecon-book-theme#335

Changes

• Updates to install theme from branch
• Enables CI preview build with the updated theme

Theme Updates (PR #335)

Security & Dependencies

• ✅ Fixed npm vulnerabilities (cross-spawn, nanoid)
• ✅ Added SRI hashes to CDN scripts
• ✅ Updated Node.js from 16.13.2 (EOL) to 18.18.0 LTS
• ✅ Updated all npm dependencies to latest versions

Code Organization

• ✅ Modularized SCSS: 2038 lines → 11 focused modules
• ✅ Modularized JavaScript: 565 lines → 8 focused modules
• ✅ JS bundle reduced from 8.91 KiB to 8.73 KiB

Performance

• ✅ Added preconnect hints for faster CDN loading (~100-300ms improvement)

Testing

• ✅ Increased from 13 to 23 tests (77% increase)
• ✅ Fixed all deprecation warnings (19 → 0)
• ✅ Zero security vulnerabilities

Preview

Once CI completes, a Netlify preview will be available to test the visual appearance and functionality with the updated theme.

Expected Outcome

The site should look identical to the current version while benefiting from improved security, maintainability, and performance.

[github-actions]

📖 Netlify Preview Ready!

Preview URL: https://pr-740--sunny-cactus-210e3e.netlify.app (e245cf0)

[github-actions]

📖 Netlify Preview Ready!

Preview URL: https://pr-740--sunny-cactus-210e3e.netlify.app (3aab49d)

[mmcky]

Theme Preview Regression Check ✅

Compared the Netlify preview build against the live site at python.quantecon.org to verify the theme refactor (PR #335) introduces no visual regressions.

Pages Tested

Page	Status
Introduction (intro.html)	✅ Pass
Finite Markov Chains (#34)	✅ Pass
Wealth Distribution Dynamics (#39)	✅ Pass
Kalman Filter (#40)	✅ Pass
McCall Search Model (#42)	✅ Pass

Elements Verified

Element	Result
Code blocks + copy button	✅ Identical
Matplotlib figures	✅ Same rendering
Math equations (inline & block)	✅ Correct
Numbered equations	✅ Same format
Collapsible solutions	✅ Working
Code warnings (⚠️ admonitions)	✅ Displays
Sidebar navigation (91 lectures)	✅ Complete
External links (QuantEcon, Wikipedia)	✅ Working
Internal cross-references	✅ Working
Footnotes	✅ Clickable
Footer (CC license, theme credit)	✅ Present

Conclusion

No regressions detected. The theme refactor maintains full visual and functional parity with the production site. Safe to merge once upstream PR #335 is ready.

[github-actions]

📖 Netlify Preview Ready!

Preview URL: https://pr-740--sunny-cactus-210e3e.netlify.app (1cc75f3)

[mmcky]

@DrDrij building a new preview of the intermediate lectures now. Should post a new link once it's complete. I will check back and sent it through to you.

[mmcky]

Closing as no longer required. The quantecon-book-theme refactor has been merged.