fix(subscriptions): subscriptions_by_plan и ending_paid_subscriptions

Refs EventHub/EventHubFrontAdmin#28

Co-authored-by: Cursor <cursoragent@cursor.com>

src/pages/subscriptions/SubscriptionListPage.tsx

@@ -198,8 +198,31 @@ const SubscriptionListPage: React.FC = () => {
                             </Card>
                         </Col>
                     ))}
+                    {Object.entries(stats.subscriptions_by_plan || {}).map(([plan, count]) => (
+                        <Col xs={12} sm={6} md={4} key={`plan-${plan}`}>
+                            <Card>
+                                <Statistic title={`План: ${plan}`} value={count} />
+                            </Card>
+                        </Col>
+                    ))}
                 </Row>
             )}
+            {stats?.ending_paid_subscriptions && stats.ending_paid_subscriptions.length > 0 && (
+                <Card title="Заканчивающиеся платные подписки" style={{ marginBottom: 16 }}>
+                    <Table
+                        size="small"
+                        pagination={false}
+                        rowKey="id"
+                        dataSource={stats.ending_paid_subscriptions}
+                        columns={[
+                            { title: 'ID', dataIndex: 'id', key: 'id' },
+                            { title: 'Пользователь', dataIndex: 'user_id', key: 'user_id' },
+                            { title: 'План', dataIndex: 'plan', key: 'plan' },
+                            { title: 'Истекает', dataIndex: 'expires_at', key: 'expires_at' },
+                        ]}
+                    />
+                </Card>
+            )}
             <Space style={{ marginBottom: 16 }}>
                 <Select
                     allowClear