chore(ui): add top dark fade to hero video and generate correct icon.png from logo

Former-commit-id: b7a0c2079f4a51ee0a5c1f947e42a42c6d44d88d

components/blocks/HeroVideo.tsx

@@ -62,6 +62,9 @@ export function HeroVideo(props: HeroVideoProps) {
       <div className="absolute inset-0 bg-[radial-gradient(ellipse_at_center,_var(--tw-gradient-stops))] from-transparent via-black/20 to-black/80 z-[2]" />
       <div className="absolute inset-0 bg-gradient-to-t from-neutral-dark via-neutral-dark/60 to-transparent z-[3]" />
       
+      {/* Top Fade for Header Navigation Readability */}
+      <div className="absolute top-0 left-0 w-full h-48 bg-gradient-to-b from-black/70 to-transparent z-[3] pointer-events-none" />
+      
       <div className="container relative z-[4] text-center px-4">
         <motion.div
           initial={{ opacity: 0, y: 40 }}