remove unused stuff, refactor frontend folder structure

client/ui/frontend/src/components/dialog/DialogDescription.tsx

@@ -0,0 +1,13 @@
+import { ReactNode } from "react";
+import { cn } from "@/lib/cn";
+
+// DialogDescription is the supporting description text rendered under a
+// DialogHeading inside ConfirmDialog (and similar dialog surfaces).
+type DialogDescriptionProps = {
+    children: ReactNode;
+    className?: string;
+};
+
+export const DialogDescription = ({ children, className }: DialogDescriptionProps) => (
+    <p className={cn("text-sm text-nb-gray-300 select-none", className)}>{children}</p>
+);