feat(students): add multi-enrollment comparison view in student list expand row

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

@@ -12,6 +12,10 @@ import {
   Popconfirm,
   Upload,
   App,
+  Row,
+  Col,
+  Card,
+  Descriptions,
 } from 'antd';
 import {
   PlusOutlined,
@@ -43,6 +47,25 @@ const statusMap: Record<string, { text: string; color: string }> = {
   archived: { text: '已归档', color: '#999' },
 };
 
+interface EnrollmentInfo {
+  classId: number;
+  className: string;
+  classType: string;
+  startDate: string;
+  endDate: string;
+  joinDate: string;
+  leaveDate: string;
+  status: string;
+  attendanceStats: {
+    total: number;
+    present: number;
+    absent: number;
+    late: number;
+    leave: number;
+    rate: number;
+  };
+}
+
 const StudentsPage: React.FC = () => {
   const { modal } = App.useApp();
   const [data, setData] = useState<any[]>([]);
@@ -54,6 +77,7 @@ const StudentsPage: React.FC = () => {
   const [showArchived, setShowArchived] = useState(false);
   const [archivedCount, setArchivedCount] = useState(0);
   const [selectedRowKeys, setSelectedRowKeys] = useState<number[]>([]);
+  const [enrollmentData, setEnrollmentData] = useState<Record<number, EnrollmentInfo[]>>({});
   const [form] = Form.useForm();
 
   const handleViewSensitive = (studentId: number, field: string, value: string) => {
@@ -395,7 +419,59 @@ const StudentsPage: React.FC = () => {
           onChange: (keys) => setSelectedRowKeys(keys as number[]),
           getCheckboxProps: (record: any) => ({ disabled: record.status === 'archived' }),
         }}
-      />
+        expandable={{
+          rowExpandable: () => true,
+          expandedRowRender: (record) => {
+            const enrollments = enrollmentData[record.id];
+            if (!enrollments) return null;
+            if (enrollments.length < 2) {
+              return (
+                <div style={{ padding: 8, color: '#999', fontSize: 13 }}>
+                  当前仅 {enrollments.length} 个班型，无可对比数据
+                </div>
+              );
+            }
+            return (
+              <Card title="多班型对比" size="small" style={{ margin: '8px 0' }}>
+                <Row gutter={16}>
+                  {enrollments.map((enr, idx) => (
+                    <Col span={12} key={enr.classId}>
+                      <Card
+                        size="small"
+                        title={enr.classType || `班型 ${idx + 1}`}
+                        style={{ background: idx === 0 ? '#f0f5ff' : '#f6ffed' }}
+                      >
+                        <Descriptions column={1} size="small">
+                          <Descriptions.Item label="班级">{enr.className || '-'}</Descriptions.Item>
+                          <Descriptions.Item label="开班日期">{enr.startDate || enr.joinDate || '-'}</Descriptions.Item>
+                          <Descriptions.Item label="结课日期">{enr.endDate || enr.leaveDate || '-'}</Descriptions.Item>
+                          <Descriptions.Item label="状态">
+                            <Tag color={enr.status === 'active' ? 'green' : 'default'}>
+                              {enr.status || '-'}
+                            </Tag>
+                          </Descriptions.Item>
+                        </Descriptions>
+                      </Card>
+                    </Col>
+                  ))}
+                </Row>
+              </Card>
+            );
+          },
+          onExpand: async (expanded, record) => {
+            if (expanded && !enrollmentData[record.id]) {
+              try {
+                const res = await api.get<{ enrollments: EnrollmentInfo[] }>(
+                  `/students/${record.id}/compare-classes`,
+                );
+                setEnrollmentData((prev) => ({ ...prev, [record.id]: res.enrollments }));
+              } catch {
+                setEnrollmentData((prev) => ({ ...prev, [record.id]: [] }));
+              }
+            }
+          },
+        }}
+       />
       <style>{`.archived-row { opacity: 0.6; background: #fafafa !important; }`}</style>
       <Modal
         title={editing ? '编辑学生' : '添加学生'}

apps/server/src/students/students.service.ts

@@ -193,6 +193,8 @@ export class StudentsService {
         classId: e.classId,
         className: e.class?.name || '',
         classType: e.class?.classType || '',
+        startDate: e.class?.startDate || '',
+        endDate: e.class?.endDate || '',
         joinDate: e.joinDate,
         leaveDate: e.leaveDate,
         status: e.status,