### 1. 主题

**旭东 → OpenClaw：**
> app.js?v=1787912577:16405 GET http://192.168.8.186:18888/api/purchase/pending_list?status=backup 500 (INTERNAL SERVER ERROR)
> loadBackupList @ app.js?v=1787912577:16405
> loadPurchaseReadyPage @ app.js?v=1787912577:16379
> loadPage @ app.js?v=1787912577:3692
> (anonymous) @ ready:634
> VM488:1 Uncaught (in promise) SyntaxError: Unexpected token '<', "<!doctype "... is not valid JSON

**OpenClaw 响应：**
已修复下单备份列表接口500错误。原因是新增下单人关联查询时，不同数据表字符集排序规则不一致，触发MySQL `Illegal mix of collations`；现对相关编码关联查询统一使用BINARY比较，保留原有数据和功能。数据库查询验证、Python/JavaScript语法检查、diff检查通过；测试服务已重载，HTTP 200正常。Git提交 `09994f1`。