fix: enhance pagination settings across multiple pages with default size and options

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

@@ -530,7 +530,11 @@ const ClassDetailPage: React.FC = () => {
                   columns={studentColumns}
                   dataSource={students}
                   rowKey="id"
-                  pagination={{ pageSize: 20 }}
+                  pagination={{
+                    defaultPageSize: 20,
+                    showSizeChanger: true,
+                    pageSizeOptions: [20, 50, 100],
+                  }}
                 />
                 <Modal
                   title="添加学员"
@@ -574,7 +578,11 @@ const ClassDetailPage: React.FC = () => {
                   columns={teacherColumns}
                   dataSource={teachers}
                   rowKey="id"
-                  pagination={{ pageSize: 20 }}
+                  pagination={{
+                    defaultPageSize: 20,
+                    showSizeChanger: true,
+                    pageSizeOptions: [20, 50, 100],
+                  }}
                 />
                 <Modal
                   title="添加教师"
@@ -633,7 +641,11 @@ const ClassDetailPage: React.FC = () => {
                   columns={scheduleColumns}
                   dataSource={schedules}
                   rowKey="id"
-                  pagination={{ pageSize: 20 }}
+                  pagination={{
+                    defaultPageSize: 20,
+                    showSizeChanger: true,
+                    pageSizeOptions: [20, 50, 100],
+                  }}
                 />
               </div>
             ),