feat: update layout components, fix AccentLink styles, add Tooltip and Cursor components

components/ui/Cursor.tsx

@@ -0,0 +1,36 @@
+"use client";
+
+import { useEffect, useRef } from "react";
+
+export default function Cursor() {
+  const dotRef = useRef<HTMLDivElement>(null);
+
+  useEffect(() => {
+    // Skip on touchscreens — pointer:fine === false there
+    if (!window.matchMedia("(pointer: fine)").matches) return;
+
+    const el = dotRef.current;
+    if (!el) return;
+
+    const move = (e: MouseEvent) => {
+      // Two translates: first moves to cursor coords, second re-centers the dot
+      el.style.transform = `translate(${e.clientX}px, ${e.clientY}px) translate(-50%, -50%)`;
+    };
+
+    window.addEventListener("mousemove", move);
+    return () => window.removeEventListener("mousemove", move);
+  }, []);
+
+  return (
+    <div
+      ref={dotRef}
+      aria-hidden
+      // Initial inline transform parks it off-screen until the first mousemove
+      style={{ transform: "translate(-100px, -100px)" }}
+      className="
+        pointer-events-none fixed left-0 top-0 z-[100]
+        size-3 rounded-full bg-white mix-blend-difference
+      "
+    />
+  );
+}