feat(platform-orders): 导出CSV增加回执总额与对账差额

app/Http/Controllers/Admin/PlatformOrderController.php

@@ -611,6 +611,8 @@ class PlatformOrderController extends Controller
                 '最近退款金额',
                 '最近退款渠道',
                 '退款总额',
+                '回执总额',
+                '对账差额',
             ];
 
             if ($includeMeta) {
@@ -677,6 +679,28 @@ class PlatformOrderController extends Controller
                             }
                             return $total;
                         })(),
+                        (function () use ($order, $receipts) {
+                            // 回执总额：优先读 payment_summary.total_amount；缺省回退遍历 payment_receipts[].amount
+                            $t = (float) (data_get($order->meta, 'payment_summary.total_amount') ?? 0);
+                            if ($t > 0) {
+                                return $t;
+                            }
+
+                            $sum = 0.0;
+                            foreach ($receipts as $r) {
+                                $sum += (float) (data_get($r, 'amount') ?? 0);
+                            }
+                            return $sum;
+                        })(),
+                        (function () use ($order, $receipts) {
+                            $receiptTotal = (float) (data_get($order->meta, 'payment_summary.total_amount') ?? 0);
+                            if ($receiptTotal <= 0) {
+                                foreach ($receipts as $r) {
+                                    $receiptTotal += (float) (data_get($r, 'amount') ?? 0);
+                                }
+                            }
+                            return (float) $receiptTotal - (float) ($order->paid_amount ?? 0);
+                        })(),
                     ];
 
                     if ($includeMeta) {