feat(performance): Core Web Vitals optimizations

- Font optimization: Replace @font-face with next/font/google (DM Sans, Inter) for faster font loading and no render-blocking
- Image optimization: Add Unsplash to remotePatterns, configure AVIF/WebP formats, add device/image sizes
- Convert native <img> tags to next/image with proper sizing and priority for LCP images
- Add optimizePackageImports for lucide-react and framer-motion to reduce bundle size
- Fix CLS: Urgency message uses fixed min-height instead of animated height
- Fix CLS: ProductCard quick-add button uses opacity instead of translate for hover
- Convert HeroVideo scroll indicator to CSS animation
- Script loading: Rybbit uses lazyOnload strategy for better INP

src/components/product/ProductCard.tsx

@@ -32,11 +32,12 @@ export default function ProductCard({ product, index = 0, locale = "sr" }: Produ
       <Link href={`/${locale}/products/${localized.slug}`} className="group block">
         <div className="relative w-full aspect-square bg-[#f8f9fa] overflow-hidden mb-4">
           {image ? (
-            <img
+            <Image
               src={image}
               alt={localized.name}
-              className="w-full h-full object-cover object-center transition-transform duration-700 ease-out group-hover:scale-105"
-              loading="lazy"
+              fill
+              className="object-cover object-center transition-transform duration-700 ease-out group-hover:scale-105"
+              sizes="(max-width: 640px) 100vw, (max-width: 1024px) 50vw, 25vw"
             />
           ) : (
             <div className="absolute inset-0 flex items-center justify-center text-[#999999]">
@@ -52,7 +53,7 @@ export default function ProductCard({ product, index = 0, locale = "sr" }: Produ
             </div>
           )}
 
-          <div className="absolute inset-x-0 bottom-0 p-4 translate-y-full group-hover:translate-y-0 transition-transform duration-300">
+          <div className="absolute inset-x-0 bottom-0 p-4 opacity-0 group-hover:opacity-100 transition-opacity duration-300">
             <button
               className="w-full py-3 bg-black text-white text-xs uppercase tracking-[0.1em] hover:bg-[#333333] transition-colors"
               onClick={(e) => {

src/components/product/ProductDetail.tsx

@@ -245,10 +245,12 @@ export default function ProductDetail({ product, relatedProducts, bundleProducts
                           : "border-transparent hover:border-[#999999]"
                       }`}
                     >
-                      <img
+                      <Image
                         src={image.url}
                         alt={image.alt || localized.name}
-                        className="w-full h-full object-cover"
+                        fill
+                        className="object-cover"
+                        sizes="100px"
                       />
                     </button>
                   ))}
@@ -256,10 +258,13 @@ export default function ProductDetail({ product, relatedProducts, bundleProducts
               )}
 
               <div className="relative w-full aspect-square bg-[#f8f9fa] overflow-hidden flex-1">
-                <img
+                <Image
                   src={images[selectedImage].url}
                   alt={images[selectedImage].alt || localized.name}
-                  className="w-full h-full object-cover"
+                  fill
+                  priority
+                  className="object-cover"
+                  sizes="(max-width: 768px) 100vw, 50vw"
                 />
 
                 {images.length > 1 && (
@@ -307,17 +312,15 @@ export default function ProductDetail({ product, relatedProducts, bundleProducts
               transition={{ duration: 0.6, delay: 0.2 }}
               className="lg:pl-8"
             >
-              <motion.div
-                key={urgencyIndex}
-                initial={{ opacity: 0, y: -10 }}
-                animate={{ opacity: 1, y: 0 }}
-                exit={{ opacity: 0, y: 10 }}
-                transition={{ duration: 0.3 }}
-                className="bg-white/80 backdrop-blur-sm text-[#1a1a1a] py-3 rounded-lg mb-4 text-sm font-medium text-left"
-              >
-                <span className="mr-2">{urgencyMessages[urgencyIndex].icon}</span>
-                {urgencyMessages[urgencyIndex].text}
-              </motion.div>
+              <div className="min-h-[52px] flex items-center">
+                <div
+                  className="bg-white/80 backdrop-blur-sm text-[#1a1a1a] py-3 px-4 rounded-lg mb-4 text-sm font-medium text-left w-full"
+                  key={urgencyIndex}
+                >
+                  <span className="mr-2">{urgencyMessages[urgencyIndex].icon}</span>
+                  {urgencyMessages[urgencyIndex].text}
+                </div>
+              </div>
 
               <h1 className="text-3xl md:text-4xl font-medium mb-4 tracking-tight">
                 {localized.name}