feat: add ProductImage component with onError fallback

components/parts/ProductImage.tsx

@@ -0,0 +1,42 @@
+'use client';
+
+import { useEffect, useRef } from 'react';
+
+const PLACEHOLDER = '/images/product-placeholder.svg';
+
+interface ProductImageProps {
+  src?: string | null;
+  alt: string;
+  className?: string;
+  width?: number;
+  height?: number;
+  loading?: 'lazy' | 'eager';
+}
+
+export function ProductImage({ src, alt, className, width, height, loading }: ProductImageProps) {
+  const hasErrored = useRef(false);
+
+  // Reset the loop guard whenever src changes (e.g. navigating between products)
+  useEffect(() => {
+    hasErrored.current = false;
+  }, [src]);
+
+  function handleError(e: React.SyntheticEvent<HTMLImageElement>) {
+    if (hasErrored.current) return;
+    hasErrored.current = true;
+    e.currentTarget.src = PLACEHOLDER;
+  }
+
+  return (
+    // eslint-disable-next-line @next/next/no-img-element
+    <img
+      src={src ?? PLACEHOLDER}
+      alt={alt}
+      className={className}
+      width={width}
+      height={height}
+      loading={loading}
+      onError={handleError}
+    />
+  );
+}