IMPROVED - Make dock feel like the real macOS dock

- Stronger magnification (50 to 92) with snappier spring tracking.
- macOS-style launch bounce on click; running-dot indicator for the active
  page (works with fixed app-icon images, no recolor).
- Per-item icon paths in navItems so real macOS app icons can be dropped in.
- Drop the now-unused -active icon variants.

components/ui/dock.tsx

@@ -123,10 +123,12 @@ const DockIcon = ({
     [size, targetSize, size],
   );
 
+  // Snappy, near-instant tracking with a touch of smoothing — closer to how the
+  // real macOS dock follows the cursor than a soft/bouncy spring.
   const scaleSize = useSpring(sizeTransform, {
     mass: 0.1,
-    stiffness: 150,
-    damping: 12,
+    stiffness: 280,
+    damping: 22,
   });
 
   return (