Hide Google consent banner and improve image display in gallery

Adds JavaScript and CSS to hide the Google consent banner. Updates the photo gallery component to use a mobile-first responsive aspect ratio for images.

Replit-Commit-Author: Agent
Replit-Commit-Session-Id: 1f7e7e89-a520-4970-9645-37daadc466dc
Replit-Commit-Checkpoint-Type: full_checkpoint
Replit-Commit-Event-Id: 89d6d546-4436-4198-9d55-f2b55c9c1ccb
Replit-Commit-Screenshot-Url: https://storage.googleapis.com/screenshot-production-us-central1/f209e72a-0939-48fa-84fc-57854de71967/1f7e7e89-a520-4970-9645-37daadc466dc/5JDNRWP
Replit-Helium-Checkpoint-Created: true

client/src/components/photo-gallery.tsx

@@ -12,6 +12,21 @@ interface GalleryImage {
 
 const PAGE_SIZE = 24;
 
+function useIsMobile() {
+  const [isMobile, setIsMobile] = useState(window.innerWidth < 768);
+  useEffect(() => {
+    const handler = () => setIsMobile(window.innerWidth < 768);
+    window.addEventListener("resize", handler);
+    return () => window.removeEventListener("resize", handler);
+  }, []);
+  return isMobile;
+}
+
+function cloudinaryTransform(src: string, transform: string) {
+  if (!src.includes("res.cloudinary.com")) return src;
+  return src.replace(/\/upload\/[^/]+\//, `/upload/${transform}/`);
+}
+
 function thumbUrl(src: string) {
   if (src.includes("res.cloudinary.com")) return src;
   return `/api/gallery/thumb?src=${encodeURIComponent(src)}`;
@@ -322,7 +337,7 @@ export default function GalleryPage() {
                 className="group relative rounded-lg overflow-hidden bg-card border border-card-border cursor-pointer flex flex-col"
                 data-testid={`button-gallery-image-${i}`}
               >
-                <div className="relative w-full" style={{ aspectRatio: "9/16" }}>
+                <div className="relative w-full aspect-[16/9] md:aspect-[9/16]">
                   <LazyImage
                     src={thumbUrl(img.thumb)}
                     alt={img.artist || img.fileName}