Fix image OG grid crash when photo URLs are missing

Guard the OG photo grid against empty URL results so prerendering does not crash when an optimized image fetch fails.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/image-response/components/ImagePhotoGrid.tsx

@@ -59,11 +59,21 @@ export default async function ImagePhotoGrid({
     IS_PREVIEW,
   );
 
+  if (count === 0 || photoUrls.length === 0) {
+    return null;
+  }
+
   const renderPhoto = (
-    { id, urlData }: typeof photoUrls[number],
+    photo: (typeof photoUrls)[number] | undefined,
     width: number,
     height: number,
-  ) =>
+  ) => {
+    if (!photo) {
+      return null;
+    }
+
+    const { id, urlData } = photo;
+    return (
     <div
       key={id}
       style={{
@@ -85,7 +95,9 @@ export default async function ImagePhotoGrid({
           objectFit: 'cover',
         },
       }} />
-    </div>;
+    </div>
+    );
+  };
 
   return (
     <div
@@ -97,7 +109,7 @@ export default async function ImagePhotoGrid({
         gap,
       }}
     >
-      {hasSplitLayout
+      {hasSplitLayout && photoUrls.length >= 3
         ? <>
           {/* Large image (L) */}
           <div style={{