feat(admin): platform orders export include subscription id

app/Http/Controllers/Admin/PlatformOrderController.php

@@ -262,6 +262,7 @@ class PlatformOrderController extends Controller
                 '支付时间',
                 '生效时间',
                 '同步状态',
+                '订阅ID',
                 '订阅号',
                 '订阅到期',
                 '同步时间',
@@ -302,6 +303,7 @@ class PlatformOrderController extends Controller
                         optional($order->paid_at)->format('Y-m-d H:i:s') ?: '',
                         optional($order->activated_at)->format('Y-m-d H:i:s') ?: '',
                         $syncStatus,
+                        (int) ($order->site_subscription_id ?? 0),
                         $order->siteSubscription?->subscription_no ?: '',
                         optional($order->siteSubscription?->ends_at)->format('Y-m-d H:i:s') ?: '',
                         (string) (data_get($order->meta, 'subscription_activation.synced_at') ?? ''),

tests/Feature/AdminPlatformOrderExportTest.php

@@ -122,6 +122,7 @@ class AdminPlatformOrderExportTest extends TestCase
         $this->assertStringContainsString('订单号', $content);
         $this->assertStringContainsString('PO_EXPORT_0001', $content);
         $this->assertStringContainsString('同步失败原因', $content);
+        $this->assertStringContainsString('订阅ID', $content);
 
         // include_meta=1 时应包含 meta(JSON) 列
         $res2 = $this->get('/admin/platform-orders/export?include_meta=1');