feat(platform-orders): 列表摘要增加对账差额视图

app/Http/Controllers/Admin/PlatformOrderController.php

@@ -275,6 +275,9 @@ class PlatformOrderController extends Controller
                     }
                     return $sum;
                 }),
+                // 对账差额：回执总额 - 订单已付总额（当前筛选范围）
+                'reconciliation_delta' => (float) ($this->sumReceiptAmount((clone $baseQuery)->get()) - (float) ((clone $baseQuery)->sum('paid_amount') ?: 0)),
+                'reconciliation_delta_note' => '回执总额 - 订单已付总额',
             ],
             'failedReasonStats' => $failedReasonStats,
         ]);
@@ -1066,6 +1069,24 @@ class PlatformOrderController extends Controller
             });
     }
 
+    protected function sumReceiptAmount($orders): float
+    {
+        $total = 0.0;
+        foreach ($orders as $o) {
+            $t = (float) (data_get($o->meta, 'payment_summary.total_amount') ?? 0);
+            if ($t > 0) {
+                $total += $t;
+                continue;
+            }
+
+            $receipts = (array) (data_get($o->meta, 'payment_receipts', []) ?? []);
+            foreach ($receipts as $r) {
+                $total += (float) (data_get($r, 'amount') ?? 0);
+            }
+        }
+        return $total;
+    }
+
     protected function statusLabels(): array
     {
         return [