fix(docs): make bullet throb loop continuously via CSS only

Replace scroll-triggered JS animation with infinite CSS keyframe loop
(2.4s cycle). Remove IntersectionObserver code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/website/script.js

@@ -226,38 +226,6 @@
     });
   }
 
-  /* -------------------------------------------------- */
-  /*  8. Bullet throb on scroll (landing page)          */
-  /* -------------------------------------------------- */
-  function initBulletThrob() {
-    var items = document.querySelectorAll('.content-list li');
-    if (!items.length) return;
-
-    var observer = new IntersectionObserver(
-      function (entries) {
-        entries.forEach(function (entry) {
-          var li = entry.target;
-          if (entry.isIntersecting) {
-            /* stagger each bullet by its index within the list */
-            var siblings = Array.from(li.parentElement.children);
-            var idx = siblings.indexOf(li);
-            setTimeout(function () {
-              li.classList.add('in-view');
-            }, idx * 120);
-          } else {
-            /* reset when scrolled out so it throbs again on re-entry */
-            li.classList.remove('in-view');
-          }
-        });
-      },
-      { threshold: 0.3 }
-    );
-
-    items.forEach(function (item) {
-      observer.observe(item);
-    });
-  }
-
   /* -------------------------------------------------- */
   /*  Init on DOMContentLoaded                          */
   /* -------------------------------------------------- */
@@ -269,6 +237,5 @@
     initReveal();
     initSmoothScroll();
     initActiveNav();
-    initBulletThrob();
   });
 })();

docs/website/style.css

@@ -534,13 +534,12 @@ ul, ol {
 }
 
 @keyframes bullet-throb {
-  0%   { transform: scale(1);   box-shadow: 0 0 0 0 rgba(42, 157, 143, 0.5); }
-  50%  { transform: scale(1.6); box-shadow: 0 0 8px 2px rgba(42, 157, 143, 0.3); }
-  100% { transform: scale(1);   box-shadow: 0 0 0 0 rgba(42, 157, 143, 0); }
+  0%, 100% { transform: scale(1);   box-shadow: 0 0 0 0 rgba(42, 157, 143, 0); }
+  50%      { transform: scale(1.5); box-shadow: 0 0 8px 2px rgba(42, 157, 143, 0.3); }
 }
 
-.content-list li.in-view::before {
-  animation: bullet-throb 0.6s ease-out;
+.content-list li::before {
+  animation: bullet-throb 2.4s ease-in-out infinite;
 }
 
 .features-section--alt {