feat(admin): subscription show add unsynced orders stat

resources/views/admin/site_subscriptions/show.blade.php

@@ -92,6 +92,11 @@
         <h3>可同步（已支付+已生效+未同步）</h3>
         <div class="num-md">{{ $summaryStats['syncable_orders'] ?? 0 }}</div>
     </div>
+    <div class="card">
+        <h3>未同步（无记录）</h3>
+        <div class="num-md">{{ $summaryStats['unsynced_orders'] ?? 0 }}</div>
+        <div class="muted muted-xs">无 activation 且无 error</div>
+    </div>
 </div>
 
 <div class="card">

tests/Feature/AdminSiteSubscriptionShowTest.php

@@ -89,6 +89,7 @@ class AdminSiteSubscriptionShowTest extends TestCase
             ->assertSee('SUB_SHOW_0001')
             ->assertSee('关联订单总数')
             ->assertSee('可同步（已支付+已生效+未同步）')
+            ->assertSee('未同步（无记录）')
             ->assertSee('关联平台订单')
             ->assertSee('PO_SUB_SHOW_0001');
     }