feat(plans): 列表显示关联订阅/订单数量并提供跳转

app/Http/Controllers/Admin/PlanController.php

@@ -89,7 +89,7 @@ class PlanController extends Controller
             'published' => trim((string) $request->query('published', '')),
         ];
 
-        $plansQuery = $this->applyFilters(Plan::query(), $filters);
+        $plansQuery = $this->applyFilters(Plan::query()->withCount(['subscriptions', 'platformOrders']), $filters);
 
         $plans = (clone $plansQuery)
             ->orderBy('sort')
@@ -111,6 +111,9 @@ class PlanController extends Controller
                 'yearly_plans' => (clone $plansQuery)->where('billing_cycle', 'yearly')->count(),
                 'published_plans' => (clone $plansQuery)->whereNotNull('published_at')->count(),
                 'unpublished_plans' => (clone $plansQuery)->whereNull('published_at')->count(),
+                // 治理联动：当前筛选范围内关联订阅/订单总量
+                'subscriptions_count' => (clone $plansQuery)->sum('subscriptions_count'),
+                'platform_orders_count' => (clone $plansQuery)->sum('platform_orders_count'),
             ],
             'statusLabels' => $this->statusLabels(),
             'billingCycleLabels' => $this->billingCycleLabels(),