레포트에 페이지번호 컴포넌트 추가

frontend/components/report/designer/ComponentPalette.tsx

@@ -1,7 +1,7 @@
 "use client";
 
 import { useDrag } from "react-dnd";
-import { Type, Table, Image, Minus, PenLine, Stamp as StampIcon } from "lucide-react";
+import { Type, Table, Image, Minus, PenLine, Stamp as StampIcon, Hash } from "lucide-react";
 
 interface ComponentItem {
   type: string;
@@ -16,6 +16,7 @@ const COMPONENTS: ComponentItem[] = [
   { type: "divider", label: "구분선", icon: <Minus className="h-4 w-4" /> },
   { type: "signature", label: "서명란", icon: <PenLine className="h-4 w-4" /> },
   { type: "stamp", label: "도장란", icon: <StampIcon className="h-4 w-4" /> },
+  { type: "pageNumber", label: "페이지번호", icon: <Hash className="h-4 w-4" /> },
 ];
 
 function DraggableComponentItem({ type, label, icon }: ComponentItem) {