feat(admin): 仪表盘占比卡接入套餐订单占比（Top5）

app/Http/Controllers/Admin/DashboardController.php

@@ -8,6 +8,7 @@ use App\Models\Admin;
 use App\Models\Order;
 use App\Models\Product;
 use App\Models\Merchant;
+use App\Models\Plan;
 use App\Models\PlatformOrder;
 use App\Models\User;
 use App\Support\CacheKeys;
@@ -59,10 +60,31 @@ class DashboardController extends Controller
             ->limit(5)
             ->get();
 
+        // 占比卡（最小可用）：按套餐统计平台订单数量 TopN
+        $planOrderShare = PlatformOrder::query()
+            ->selectRaw('plan_id, COUNT(*) as cnt')
+            ->whereNotNull('plan_id')
+            ->groupBy('plan_id')
+            ->orderByDesc('cnt')
+            ->limit(5)
+            ->get()
+            ->map(function ($row) {
+                return [
+                    'plan_id' => (int) $row->plan_id,
+                    'count' => (int) $row->cnt,
+                ];
+            })
+            ->values()
+            ->all();
+
+        $planIdToName = Plan::query()->pluck('name', 'id')->all();
+
         return view('admin.dashboard', [
             'adminName' => $admin->name,
             'stats' => $stats,
             'recentPlatformOrders' => $recentPlatformOrders,
+            'planOrderShare' => $planOrderShare,
+            'planIdToName' => $planIdToName,
             'platformAdmin' => $admin,
             'cacheMeta' => [
                 'store' => config('cache.default'),