fix style

src/app/routes/sys-setting/components/staff-management/staff-management.component.ts

@@ -28,13 +28,14 @@ export class StaffManagementComponent implements OnInit {
   };
 
   columns: STColumn[] = [
-    { title: '', index: 'key', type: 'checkbox' },
-    { title: '员工姓名', index: 'name' },
-    { title: '手机号码', index: 'telephone' },
-    { title: '角色', index: 'roleName' },
+    { title: '', index: 'key', className: 'text-center', type: 'checkbox' },
+    { title: '员工姓名', className: 'text-center', index: 'name' },
+    { title: '手机号码', className: 'text-center', index: 'telephone' },
+    { title: '角色',className: 'text-center', index: 'roleName' },
     {
       title: '最后登录时间',
       index: 'lastLoginDate',
+      className: 'text-center',
       type: 'date'
     },
     {
@@ -49,6 +50,7 @@ export class StaffManagementComponent implements OnInit {
     },
     {
       title: '操作',
+      className: 'text-center',
       buttons: [
         {
           text: '编辑',