feat: Add photo management features, duplicate detection, attempt limits, and admin deletion

- Add duplicate photo detection (file hash and URL checking)
- Add max attempts per photo with UI counter
- Simplify penalty system (auto-enable when points > 0)
- Prevent scores from going below 0
- Add admin photo deletion functionality
- Improve navigation with always-visible logout
- Prevent users from guessing their own photos

app/photos/page.tsx

@@ -0,0 +1,73 @@
+import { auth } from "@/lib/auth"
+import { redirect } from "next/navigation"
+import { prisma } from "@/lib/prisma"
+import Link from "next/link"
+import PhotoThumbnail from "@/components/PhotoThumbnail"
+import DeletePhotoButton from "@/components/DeletePhotoButton"
+
+// Enable caching for this page
+export const revalidate = 60 // Revalidate every 60 seconds
+
+export default async function PhotosPage() {
+  const session = await auth()
+
+  if (!session) {
+    redirect("/login")
+  }
+
+  // Limit to 50 photos per page for performance
+  const photos = await prisma.photo.findMany({
+    take: 50,
+    orderBy: { createdAt: "desc" },
+    include: {
+      uploader: {
+        select: {
+          name: true,
+        },
+      },
+    },
+  })
+
+  return (
+    <div className="max-w-7xl mx-auto px-4 py-8">
+      <h1 className="text-3xl font-bold text-gray-900 mb-6">All Photos</h1>
+
+      {photos.length === 0 ? (
+        <div className="bg-white rounded-lg shadow-md p-8 text-center">
+          <p className="text-gray-500">No photos yet. Be the first to upload one!</p>
+        </div>
+      ) : (
+        <div className="grid grid-cols-1 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4 gap-6">
+          {photos.map((photo: { id: string; url: string; answerName: string; points: number; createdAt: Date; uploader: { name: string } }) => (
+            <div
+              key={photo.id}
+              className="bg-white rounded-lg shadow-md overflow-hidden hover:shadow-lg transition relative group"
+            >
+              <Link href={`/photos/${photo.id}`}>
+                <div className="aspect-square bg-gray-200 relative">
+                  <PhotoThumbnail src={photo.url} alt="Photo" />
+                </div>
+                <div className="p-4">
+                  <div className="flex items-center justify-between mb-1">
+                    <p className="text-sm text-gray-500">Uploaded by {photo.uploader.name}</p>
+                    <span className="inline-flex items-center px-2 py-0.5 rounded text-xs font-medium bg-purple-100 text-purple-800">
+                      {photo.points} {photo.points === 1 ? "pt" : "pts"}
+                    </span>
+                  </div>
+                  <p className="text-xs text-gray-400 mt-1">
+                    {new Date(photo.createdAt).toLocaleDateString()}
+                  </p>
+                </div>
+              </Link>
+              {session.user.role === "ADMIN" && (
+                <div className="absolute top-2 right-2 opacity-0 group-hover:opacity-100 transition-opacity">
+                  <DeletePhotoButton photoId={photo.id} />
+                </div>
+              )}
+            </div>
+          ))}
+        </div>
+      )}
+    </div>
+  )
+}