Fix broken image paths in people, project, and software layouts

[kltm]

Summary

• Make relative image/logo src attributes absolute by prepending page.url in all three layouts (people.html, project.html, software.html)
• External URLs (containing ://) are left unchanged
• Fixes 404s for all people profile photos (~15 people affected) and relative project/software logos (CCDH, Apollo)

Problem

The layouts used bare relative paths like <img src="seth.jpg">. When a page is accessed without a trailing slash (e.g., /people/seth-carbon instead of /people/seth-carbon/), the browser resolves seth.jpg relative to /people/ rather than /people/seth-carbon/, producing a 404.

Fix

For local filenames, prepend {{page.url}} (which always includes the trailing slash for index.md files), producing absolute paths like /people/seth-carbon/seth.jpg. External URLs are detected via contains '://' and passed through unchanged.

Test plan

• Verify people profile photos load correctly (e.g., /people/seth-carbon, /people/nomi-harris)
• Verify CCDH project logo loads at /project/ccdh
• Verify Apollo software logo loads at /software/apollo
• Verify external logos still work (e.g., Gene Ontology, Monarch, Exomiser)
• Test pages both with and without trailing slash

🤖 Generated with Claude Code

[nlharris]

The layouts used bare relative paths like . When a page is accessed without a trailing slash (e.g., /people/seth-carbon instead of /people/seth-carbon/), the browser resolves seth.jpg relative to /people/ rather than /people/seth-carbon/, producing a 404.

Huh, I hadn't thought to test that.