feat: 모달에서 라우팅 시 모달 닫히도록 로직 추가

apps/admin/app/studies/[study]/assignments/[week]/@modal/(.)success/page.tsx

@@ -3,13 +3,19 @@
 import { Flex, styled } from "@styled-system/jsx";
 import { Modal, Text } from "@wow-class/ui";
 import Link from "next/link";
+import { usePathname } from "next/navigation";
 import Button from "wowds-ui/Button";
 
 const AssignmentSuccessModal = ({
   params,
 }: {
   params: { study: string; week: string };
 }) => {
+  const pathname = usePathname();
+  if (!pathname.includes(`/${params.week}/success`)) {
+    return null;
+  }
+
   return (
     <Modal>
       <Flex align="center" direction="column" gap="2.375rem" width="21rem">