fix: import Tabs/Descriptions, remove duplicate state

apps/admin/src/pages/Students/index.tsx

@@ -17,6 +17,8 @@ import {
   Col,
   Card,
   Drawer,
+  Tabs,
+  Descriptions,
 } from 'antd';
 import {
   PlusOutlined,
@@ -82,11 +84,8 @@ const StudentsPage: React.FC = () => {
   const [archivedCount, setArchivedCount] = useState(0);
   const [selectedRowKeys, setSelectedRowKeys] = useState<number[]>([]);
   const [enrollmentData, setEnrollmentData] = useState<Record<number, EnrollmentInfo[]>>({});
-  const [form] = Form.useForm();
   const [drawerOpen, setDrawerOpen] = useState(false);
-  const [drawerStudentId, setDrawerStudentId] = useState<number | null>(null);
   const [drawerData, setDrawerData] = useState<any>(null);
-  const [drawerLoading, setDrawerLoading] = useState(false);
 
   const openDrawer = async (studentId: number) => {
     setDrawerStudentId(studentId);