대시보드관리 최소높이 재설정

frontend/app/(main)/admin/dashboard/page.tsx

@@ -162,7 +162,7 @@ export default function DashboardListPage() {
   };
 
   return (
-    <div className="min-h-screen bg-gray-50">
+    <div className="min-h-[calc(100vh-4rem)] bg-gray-50">
       <div className="w-full max-w-none space-y-8 px-4 py-8">
         {/* 페이지 제목 */}
         <div className="flex items-center justify-between rounded-lg border bg-white p-6 shadow-sm">