Restore frontend.

Will probably replace existing website with this one.

frontend/src/components/handleCopy.tsx

@@ -0,0 +1,10 @@
+import { ClipboardCheck } from "lucide-react";
+import { toast } from "sonner";
+
+export default function handleCopy(type: string, value: string) {
+  navigator.clipboard.writeText(value);
+
+  toast.success(`copied ${type} to clipboard`, {
+    icon: <ClipboardCheck className="h-4 w-4" />,
+  });
+}