```

feat(split): 优化分账计算诊断功能

- 添加用户信息格式化方法，显示带脱敏手机号的用户简要信息
- 实现详细的汇付接收方缺失诊断逻辑，提供具体的错误原因
- 新增分账明细为空时的详细失败消息格式化功能
- 增强后台订单分账失败原因展示，支持完整和摘要两种显示方式
- 添加规则接收方诊断功能，检测分账规则配置问题
- 优化错误信息的可读性和排查效率
```

application/admin/controller/shopro/split/Order.php

@@ -146,10 +146,11 @@ class Order extends Base
             $data['receiver_details'] = $receiverDetails;
             $data['receiver_preview'] = $receiverPreview;
             $data['receiver_summary'] = $summaryLines ? implode('；', $summaryLines) : '—';
-            $data['fail_reason'] = $this->formatFailReason($data['wx_result'] ?? '', $status);
-            $data['fail_reason_full'] = $this->formatFailReasonFull($data['wx_result'] ?? '', $status);
-
             $diag = (new SplitCalculator())->diagnose($orderId);
+            $data['fail_reason_full'] = $this->formatFailReasonFull($data['wx_result'] ?? '', $status);
+            $data['fail_reason_full'] = $this->enrichFailReasonWithDiagnose($data['fail_reason_full'], $status, $diag);
+            $data['fail_reason'] = $this->summarizeFailReason($data['fail_reason_full'], $diag, $status);
+
             $data['split_source'] = $diag['final_source'];
             $data['split_source_text'] = $this->formatSplitSourceText($diag);
             $data['split_diagnose'] = $diag['issues'];
@@ -304,6 +305,57 @@ class Order extends Base
         return $text;
     }
 
+    protected function enrichFailReasonWithDiagnose($full, $status, array $diag)
+    {
+        if ($status !== 4) {
+            return $full;
+        }
+        $issues = array_values(array_filter($diag['issues'] ?? []));
+        if (!$issues) {
+            return $full;
+        }
+        $raw = is_string($full) ? $full : '';
+        $isEmptySplit = $raw === ''
+            || strpos($raw, '分账明细为空') !== false
+            || strpos($raw, '分账未生成') !== false
+            || ($diag['final_source'] ?? '') === 'none';
+        if (!$isEmptySplit) {
+            return $full;
+        }
+        $block = implode("\n", $issues);
+        if ($raw === '') {
+            return '分账未生成：' . implode('；', $issues);
+        }
+        if (strpos($raw, implode('；', array_slice($issues, 0, 1))) !== false) {
+            return $raw;
+        }
+        return $raw . "\n" . $block;
+    }
+
+    protected function summarizeFailReason($full, array $diag, $status)
+    {
+        if ($status !== 4 || $full === '') {
+            return $this->formatFailReasonFromFull($full, $status);
+        }
+        $issues = array_values(array_filter($diag['issues'] ?? []));
+        if ($issues) {
+            $brief = $issues[0];
+            if (count($issues) > 1) {
+                $brief .= ' 等' . count($issues) . '项';
+            }
+            return mb_strlen($brief) > 72 ? (mb_substr($brief, 0, 72) . '…') : $brief;
+        }
+        return $this->formatFailReasonFromFull($full, $status);
+    }
+
+    protected function formatFailReasonFromFull($full, $status)
+    {
+        if ($status !== 4 || $full === '') {
+            return '';
+        }
+        return mb_strlen($full) > 72 ? (mb_substr($full, 0, 72) . '…') : $full;
+    }
+
     protected function formatFailReason($wxResult, $status)
     {
         if ($status !== 4 || $wxResult === '' || $wxResult === null) {