- Updated footer on index.html, researcher.html, advocate.html, implementer.html to 4-column layout with Community section
- Added Media Inquiries and Submit Case Study links to footers
- Added 'Submit Case Study' button to researcher page Contribute section
- Added two prominent CTA buttons to advocate page Build Community section
- Added Community links to Resources column on about.html and values.html (maintain Te Tiriti as 4th column)
- Makes media-inquiry.html and case-submission.html forms discoverable across site
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Co-Authored-By: Claude <noreply@anthropic.com>