优化登录记录角色展示

将角色从账号列拆出为独立列，避免 Tag 叠在用户名下显示异常。

apps/frontend/src/pages/admin/AdminDashboardPage.tsx

@@ -85,17 +85,18 @@ export default function AdminDashboardPage() {
     {
       title: '账号',
       dataIndex: 'username',
-      minWidth: 140,
-      render: (value, row) => (
-        <div className="cell-stack">
-          <Typography.Text strong>{value || '-'}</Typography.Text>
-          {row.role ? <StatusTag value={row.role} /> : null}
-        </div>
-      ),
+      minWidth: 120,
+      render: (value) => <Typography.Text strong>{value || '-'}</Typography.Text>,
+    },
+    {
+      title: '角色',
+      dataIndex: 'role',
+      width: 110,
+      render: (value) => <StatusTag value={value} kind="role" />,
     },
     {
       title: '结果',
-      width: 100,
+      width: 90,
       render: (_, row) =>
         row.success ? (
           <Tag color="green">成功</Tag>