fix(admin-dashboard): scope plan share to last 7 days

app/Http/Controllers/Admin/DashboardController.php

@@ -196,9 +196,10 @@ 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
+        // 占比卡（最小可用）：近 7 天按套餐统计平台订单数量 TopN
         $planOrderShare = PlatformOrder::query()
             ->selectRaw('plan_id, COUNT(*) as cnt')
+            ->whereBetween('created_at', [$trendStart, $trendEnd])
             ->whereNotNull('plan_id')
             ->groupBy('plan_id')
             ->orderByDesc('cnt')