Reduce navigation flash with instant theme background and view transitions.

Co-authored-by: Cursor <cursoragent@cursor.com>

static/js/nav.js

@@ -41,10 +41,29 @@
         backdrop.addEventListener('click', closeNav);
     }
 
-    nav.querySelectorAll('a').forEach(function (link) {
+    function prefetchNav(href) {
+        if (!href || href.indexOf(window.location.origin) !== 0) return;
+        if (href === window.location.href) return;
+        var links = document.head.querySelectorAll('link[rel="prefetch"]');
+        for (var i = 0; i < links.length; i++) {
+            if (links[i].href === href) return;
+        }
+        var link = document.createElement('link');
+        link.rel = 'prefetch';
+        link.href = href;
+        document.head.appendChild(link);
+    }
+
+    nav.querySelectorAll('a[href]').forEach(function (link) {
         link.addEventListener('click', function () {
             if (isMobileNav()) closeNav();
         });
+        link.addEventListener('mouseenter', function () {
+            prefetchNav(link.href);
+        });
+        link.addEventListener('touchstart', function () {
+            prefetchNav(link.href);
+        }, { passive: true });
     });
 
     window.addEventListener('resize', function () {

static/js/theme.js

@@ -19,10 +19,14 @@
             theme = 'dark';
         }
         document.documentElement.setAttribute('data-theme', theme);
+        document.documentElement.style.colorScheme = theme;
+        document.documentElement.style.background = theme === 'light' ? '#e8eef8' : '#050508';
         try {
             localStorage.setItem(KEY, theme);
         } catch (e) { /* ignore */ }
         updateButtons(theme);
+        var meta = document.getElementById('meta-theme-color');
+        if (meta) meta.setAttribute('content', theme === 'light' ? '#e8eef8' : '#050508');
     }
 
     var saved = null;