Fix mobile reflow for jump links on people/publications pages

The jump links at the top of people.html and publications.html were
getting cut off on mobile due to white-space: nowrap. Added mobile
override to allow wrapping with proper line-height.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jeremymanning

css/style.css

@@ -1697,6 +1697,12 @@ body.homepage .site-header {
         margin: 0 auto 20px;
     }
 
+    /* Jump links - allow wrapping on mobile */
+    .jump-links {
+        white-space: normal;
+        line-height: 1.8;
+    }
+
     /* Footer navigation - mobile layout (hamburger menu style) */
     .footer-nav {
         padding: 12px 0;