fix: replace deprecated antd Space direction→orientation

apps/admin/src/pages/Classes/detail.tsx

@@ -461,7 +461,7 @@ const ClassDetailPage: React.FC = () => {
                   onOk={handleAddTeacher}
                   onCancel={() => setTeacherModalOpen(false)}
                 >
-                  <Space direction="vertical" style={{ width: '100%' }}>
+                  <Space orientation="vertical" style={{ width: '100%' }}>
                     <Select
                       style={{ width: '100%' }}
                       placeholder="选择教师"

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

@@ -74,7 +74,7 @@ const PermissionsPage: React.FC = () => {
           onChange={(e) => !e.target.value && setSearch('')}
         />
       </div>
-      <Space direction="vertical" style={{ width: '100%' }} size={16}>
+      <Space orientation="vertical" style={{ width: '100%' }} size={16}>
         {filteredTree.map((group) => (
           <Card
             key={group.group}