feat: improve admin responsive pages and teacher candidates

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

@@ -529,16 +529,8 @@ const StudentsPage: React.FC = () => {
 
   return (
     <div>
-      <div
-        style={{
-          marginBottom: 16,
-          display: 'flex',
-          justifyContent: 'space-between',
-          flexWrap: 'wrap',
-          gap: 8,
-        }}
-      >
-        <Space wrap>
+      <div className="responsive-toolbar">
+        <Space wrap className="responsive-toolbar__group">
           <Input.Search
             placeholder="搜索学生姓名"
             onSearch={setSearchName}
@@ -586,7 +578,7 @@ const StudentsPage: React.FC = () => {
               : `显示已归档${archivedCount > 0 ? ` (${archivedCount})` : ''}`}
           </Button>
         </Space>
-        <Space wrap>
+        <Space wrap className="responsive-toolbar__group">
           <Popconfirm
             title={`确定批量归档选中的 ${selectedRowKeys.length} 名学生？（数据保留，可恢复）`}
             onConfirm={handleBatchDelete}