```

feat(shopro_huifu): 完善汇付分账确认功能

- 添加收款方尾款余额处理逻辑，在主商户与收款户相同时，
  分账confirm后对剩余金额进行补确认操作
- 新增executeConfirmOnlyByOrderId方法支持同步支付扩展信息参数
- 增加resolveDelayConfirmStatus方法动态解析确认状态，
  根据未确认金额判断返回P或S状态
- 优化confirm流程中序列号更新逻辑，确保使用最终确认序列号
- 添加异常处理机制，记录收款方余额确认失败日志
```

addons/shopro_huifu/library/HuifuSplitService.php

@@ -106,16 +106,32 @@ class HuifuSplitService
             }
 
             $confirmResult = $this->confirm($ext, $acctInfos, $outOrderNo, $confirmBase);
+            $finalConfirmSeq = $confirmResult['hf_seq_id'] ?? ($confirmResult['confirm_hf_seq_id'] ?? '');
+            try {
+                $remainderResult = $this->releaseCollectorRemainderIfNeeded($orderId, $order['order_sn'], $confirmBase, $acctInfos);
+                if ($remainderResult !== null) {
+                    $confirmResult['collector_remainder_confirm'] = $remainderResult;
+                    $seq = $remainderResult['hf_seq_id'] ?? '';
+                    if ($seq !== '') {
+                        $finalConfirmSeq = $seq;
+                    }
+                }
+            } catch (\Exception $remainderEx) {
+                \think\Log::error('[shopro_huifu] collector remainder confirm failed order_id=' . $orderId
+                    . ' msg=' . $remainderEx->getMessage());
+                $confirmResult['collector_remainder_error'] = $remainderEx->getMessage();
+            }
+
             $splitOrder->status = 2;
-            $splitOrder->confirm_hf_seq_id = $confirmResult['hf_seq_id'] ?? ($confirmResult['confirm_hf_seq_id'] ?? '');
+            $splitOrder->confirm_hf_seq_id = $finalConfirmSeq;
             $splitOrder->hf_req_seq_id = $outOrderNo;
             $splitOrder->wx_result = json_encode($confirmResult, JSON_UNESCAPED_UNICODE);
             $splitOrder->save();
 
             SplitOrderReceiver::where('split_order_id', $splitOrder->id)->update(['status' => 1]);
             HuifuPayService::savePayExt($orderId, $order['order_sn'], [
-                'confirm_hf_seq_id' => $splitOrder->confirm_hf_seq_id,
-                'confirm_status'    => 'S',
+                'confirm_hf_seq_id' => $finalConfirmSeq,
+                'confirm_status'    => $this->resolveDelayConfirmStatus($order['order_sn']),
             ]);
             Db::commit();
             $manualService->finishPendingRetryLog($orderId, true, '', $splitOrder->id);
@@ -185,7 +201,7 @@ class HuifuSplitService
     /**
      * 仅交易确认、不传分账串（用于排查 22000002 是否来自分账接收方配置）
      */
-    public function executeConfirmOnlyByOrderId($orderId)
+    public function executeConfirmOnlyByOrderId($orderId, $syncPayExt = true)
     {
         $order = Order::get($orderId);
         if (!$order || $order['pay_type'] !== 'huifu_wechat') {
@@ -213,7 +229,68 @@ class HuifuSplitService
         \think\Log::write('[shopro_huifu] delaytrans confirm-only extend=' . json_encode($extend, JSON_UNESCAPED_UNICODE), 'info');
         $request->setExtendInfo($extend);
         $result = $this->client->postRequest($request);
-        return $this->client->parseResponse($result);
+        $data = $this->client->parseResponse($result);
+        if ($syncPayExt) {
+            $this->syncPayExtAfterDelayConfirm($orderId, $order['order_sn'], $data);
+        }
+        return $data;
+    }
+
+    /**
+     * 主商户=收款户时，分账 confirm 只确认 acct_infos 部分，尾款需再调一次无分账串的 confirm。
+     *
+     * @return array|null 汇付返回；无需补确认时 null
+     */
+    protected function releaseCollectorRemainderIfNeeded($orderId, $orderSn, $confirmBase, array $acctInfos)
+    {
+        $paymentHuifuId = trim((string) $this->config->get('huifu_id'));
+        $platformHuifuId = trim((string) ((new SplitConfig())->all()['platform_huifu_id'] ?? $paymentHuifuId));
+        if ($platformHuifuId === '' || $platformHuifuId !== $paymentHuifuId) {
+            return null;
+        }
+        $confirmBase = number_format((float) $confirmBase, 2, '.', '');
+        $splitSum = '0.00';
+        foreach ($acctInfos as $info) {
+            $splitSum = bcadd($splitSum, number_format((float) ($info['div_amt'] ?? 0), 2, '.', ''), 2);
+        }
+        $expectedRemain = bcsub($confirmBase, $splitSum, 2);
+        if (bccomp($expectedRemain, '0.00', 2) <= 0) {
+            return null;
+        }
+
+        $query = (new HuifuQueryService())->queryByOrderSn($orderSn);
+        $unconfirm = $this->queryFieldRecursive($query, 'unconfirm_amt');
+        if (!$this->isPositiveMoney($unconfirm)) {
+            return null;
+        }
+
+        \think\Log::info('[shopro_huifu] delaytrans collector remainder confirm order_id=' . $orderId
+            . ' expected_remain=' . $expectedRemain . ' unconfirm_amt=' . $unconfirm);
+
+        return $this->executeConfirmOnlyByOrderId($orderId, false);
+    }
+
+    protected function resolveDelayConfirmStatus($orderSn)
+    {
+        try {
+            $query = (new HuifuQueryService())->queryByOrderSn($orderSn);
+            $unconfirm = $this->queryFieldRecursive($query, 'unconfirm_amt');
+            if ($this->isPositiveMoney($unconfirm)) {
+                return 'P';
+            }
+        } catch (\Throwable $e) {
+            \think\Log::warning('[shopro_huifu] resolveDelayConfirmStatus query failed: ' . $e->getMessage());
+        }
+        return 'S';
+    }
+
+    protected function syncPayExtAfterDelayConfirm($orderId, $orderSn, array $confirmData)
+    {
+        $seq = $confirmData['hf_seq_id'] ?? ($confirmData['confirm_hf_seq_id'] ?? '');
+        HuifuPayService::savePayExt($orderId, $orderSn, [
+            'confirm_hf_seq_id' => $seq,
+            'confirm_status'    => $this->resolveDelayConfirmStatus($orderSn),
+        ]);
     }
 
     protected function confirm($ext, array $acctInfos, $confirmReqSeqId, $confirmBase = null)