feat(admin): subscription show failed reason top3

app/Http/Controllers/Admin/SiteSubscriptionController.php

@@ -45,6 +45,25 @@ class SiteSubscriptionController extends Controller
                 ->count(),
         ];
 
+        // 同步失败原因聚合（Top3）：订阅维度快速判断“常见失败原因”
+        $failedReasonRows = (clone $baseOrdersQuery)
+            ->whereRaw("JSON_EXTRACT(meta, '$.subscription_activation_error.message') IS NOT NULL")
+            ->selectRaw("JSON_EXTRACT(meta, '$.subscription_activation_error.message') as reason, count(*) as cnt")
+            ->groupBy('reason')
+            ->orderByDesc('cnt')
+            ->limit(3)
+            ->get();
+
+        $failedReasonStats = $failedReasonRows->map(function ($row) {
+            $reason = (string) ($row->reason ?? '');
+            $reason = trim($reason, "\" ");
+
+            return [
+                'reason' => $reason !== '' ? $reason : '（空）',
+                'count' => (int) ($row->cnt ?? 0),
+            ];
+        })->values()->all();
+
         // 页面列表筛选：仅影响“关联平台订单”列表展示，不影响摘要统计
         $orderSyncStatus = trim((string) $request->query('order_sync_status', ''));
 
@@ -93,6 +112,7 @@ class SiteSubscriptionController extends Controller
             'subscription' => $subscription,
             'platformOrders' => $platformOrders,
             'summaryStats' => $summaryStats,
+            'failedReasonStats' => $failedReasonStats,
             'statusLabels' => $this->statusLabels(),
             'expiryLabel' => $expiryLabel,
         ]);

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

@@ -115,6 +115,20 @@
         <div class="num-md">{{ $summaryStats['unsynced_orders'] ?? 0 }}</div>
         <div class="muted muted-xs">无 activation 且无 error</div>
     </div>
+
+    <div class="card">
+        <h3>失败原因Top3</h3>
+        @php $failedReasonStats = $failedReasonStats ?? []; @endphp
+        @if(count($failedReasonStats) > 0)
+            <div class="muted mt-6">
+                @foreach($failedReasonStats as $item)
+                    <div>{{ $item['reason'] }} <span class="muted">（{{ $item['count'] }}）</span></div>
+                @endforeach
+            </div>
+        @else
+            <div class="muted">暂无失败原因聚合数据</div>
+        @endif
+    </div>
 </div>
 
 <div class="card">

tests/Feature/AdminSiteSubscriptionShowTest.php

@@ -90,6 +90,7 @@ class AdminSiteSubscriptionShowTest extends TestCase
             ->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('失败原因Top3')
             ->assertSee('关联平台订单')
             ->assertSee('PO_SUB_SHOW_0001')
             ->assertSee('同步时间')