feat(admin): platform orders show subscription id link

resources/views/admin/platform_orders/index.blade.php

@@ -269,7 +269,12 @@
                 </td>
                 <td>
                     @if($order->siteSubscription)
-                        <a href="/admin/site-subscriptions/{{ $order->siteSubscription->id }}">{{ $order->siteSubscription->subscription_no }}</a>
+                        <div>
+                            <a href="/admin/site-subscriptions/{{ $order->siteSubscription->id }}">{{ $order->siteSubscription->subscription_no }}</a>
+                        </div>
+                        <div class="muted muted-xs">
+                            订阅ID：<a href="/admin/platform-orders?site_subscription_id={{ $order->siteSubscription->id }}" class="muted">{{ $order->siteSubscription->id }}</a>
+                        </div>
                     @else
                         <span class="muted">-</span>
                     @endif

tests/Feature/AdminPlatformOrderTest.php

@@ -212,7 +212,9 @@ class AdminPlatformOrderTest extends TestCase
         $this->get('/admin/platform-orders?keyword=PO_SUB_LINK_0001')
             ->assertOk()
             ->assertSee('SUB_LINK_0001')
-            ->assertSee('/admin/site-subscriptions/' . $sub->id);
+            ->assertSee('/admin/site-subscriptions/' . $sub->id)
+            ->assertSee('订阅ID：')
+            ->assertSee('/admin/platform-orders?site_subscription_id=' . $sub->id);
 
         // 只看已同步：构造一条带有 subscription_activation 的订单 + 批量同步审计（用于列表展示）
         PlatformOrder::query()->where('order_no', 'PO202603100101')->update([