feat: add resilient cover previews and zoom

components/Hero.tsx

@@ -24,6 +24,7 @@ export const Hero: React.FC<HeroProps> = ({ onPlay }) => {
           src={featuredCourse.thumbnail}
           alt={featuredCourse.title}
           className="w-full h-full object-cover object-center"
+          style={{ transform: `scale(${featuredCourse.coverImageZoom || 1})` }}
         />
         {/* Gradients for text readability and seamless transition */}
         <div className="absolute inset-0 bg-gradient-to-t from-black via-black/60 to-black/75" />