feat: reformatting the layout of the publication, funding, and openin…

[chengjiahao1234]

Type of Change

• ✅ Enhancement / New Feature
• ✅ Styling / CSS

Summary

Aligned the publications page with the requested layout: separated published vs. under-review entries while keeping the new minimalist design, added inline documentation, and enforced consistent rectangular thumbnails.

Changes Made

• _pages/publications.md – restored distinct sections for published and under-review items with concise comments.
• _includes/publication-item.html – kept the simplified entry markup used by both sections.
• css/main.scss – tightened publication list styling and forced 16:9 rectangular thumbnails.

Testing Checklist

• Changes display correctly on desktop (1920x1080 or similar)
• Changes display correctly on tablet (768x1024 or similar)
• Changes display correctly on mobile (375x667 or similar)
• Tested in light theme
• Tested in dark theme
• No broken links or images
• No console errors
• Ran bundle exec jekyll serve locally without errors

Screenshots (if applicable)

Related Issues

Additional Notes

Not yet previewed locally—please verify visually across breakpoints/themes.

---

By submitting this PR, I confirm:

• I have tested these changes locally
• I have followed the code standards in DEVELOPMENT.md
• I have updated documentation if needed
• I am ready for this to be reviewed and merged