feat(platform-orders): 摘要卡增加有退款/无退款订单数（含测试）

app/Http/Controllers/Admin/PlatformOrderController.php

@@ -294,6 +294,16 @@ class PlatformOrderController extends Controller
                     ->whereRaw("JSON_EXTRACT(meta, '$.payment_summary.total_amount') IS NULL")
                     ->whereRaw("JSON_EXTRACT(meta, '$.payment_receipts[0].amount') IS NULL")
                     ->count(),
+                'refund_orders' => (clone $baseQuery)
+                    ->where(function (Builder $q) {
+                        $q->whereRaw("JSON_EXTRACT(meta, '$.refund_summary.total_amount') IS NOT NULL")
+                          ->orWhereRaw("JSON_EXTRACT(meta, '$.refund_receipts[0].amount') IS NOT NULL");
+                    })
+                    ->count(),
+                'no_refund_orders' => (clone $baseQuery)
+                    ->whereRaw("JSON_EXTRACT(meta, '$.refund_summary.total_amount') IS NULL")
+                    ->whereRaw("JSON_EXTRACT(meta, '$.refund_receipts[0].amount') IS NULL")
+                    ->count(),
                 'total_receipt_amount' => $totalReceiptAmount,
                 // 对账差额：回执总额 - 订单已付总额（当前筛选范围）
                 'reconciliation_delta' => (float) ($totalReceiptAmount - $totalPaidAmount),