fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理 (BaseException -> 具体异常类型)
- 修复PEP8格式问题
- 添加类型注解
- 修复tingwu_client.py缩进错误

backend/test_phase8_task6.py

@@ -649,7 +649,7 @@ console.log('Upload complete:', result.id);
         try:
             if self.created_ids['developer']:
                 summary = self.manager.get_developer_revenue_summary(self.created_ids['developer'][0])
-                self.log(f"Revenue summary for developer:")
+                self.log("Revenue summary for developer:")
                 self.log(f"  - Total sales: {summary['total_sales']}")
                 self.log(f"  - Total fees: {summary['total_fees']}")
                 self.log(f"  - Total earnings: {summary['total_earnings']}")