新功能: withdrawal_log 接口加 summary 字段 + admin 禁直接扣减 commission

接口侧:
- /v1/public/user/withdrawal_log 响应新增 summary 字段, 包含:
  - commission_balance (当前余额)
  - locked_by_pending (待审批占用)
  - available_to_withdraw (可提现)
  - total_historical_amount (已通过提现总额)
  - total_refunded_amount (退款回扣总额)
  - total_income_amount (收入总额)
- 前端可据此自洽展示账目对账, 用户能在一个接口里看清整笔账

代码守护:
- updateUserBasicInfoLogic 拒绝任何 change<0 的 commission 修改
- 扣减必须走 approveWithdrawal 写 type=334 日志
- 防止未来 admin 误操作再次造成 user.commission 与 system_logs 失衡

时间戳修复:
- queryWithdrawalLogLogic 和 queryCommissionReturnLogLogic 的时间戳
  从 UnixMilli 改回 Unix (秒级), 符合项目"后端统一秒级"约定

测试:
- 补 buildSummary 的 4 个 mock 查询期望
- 加 summary 字段值正确性断言

apis/public/user.api

@@ -137,9 +137,18 @@ type (
 		Size    int    `form:"size"`
 		BizType string `form:"biz_type" validate:"omitempty,oneof=withdrawal commission_refund"`
 	}
+	WithdrawalLogSummary {
+		CommissionBalance     int64 `json:"commission_balance"`
+		LockedByPending       int64 `json:"locked_by_pending"`
+		AvailableToWithdraw   int64 `json:"available_to_withdraw"`
+		TotalHistoricalAmount int64 `json:"total_historical_amount"`
+		TotalRefundedAmount   int64 `json:"total_refunded_amount"`
+		TotalIncomeAmount     int64 `json:"total_income_amount"`
+	}
 	QueryWithdrawalLogListResponse {
-		List  []WithdrawalLog `json:"list"`
-		Total int64           `json:"total"`
+		List    []WithdrawalLog       `json:"list"`
+		Total   int64                 `json:"total"`
+		Summary *WithdrawalLogSummary `json:"summary,omitempty"`
 	}
 	QueryCommissionReturnLogRequest {
 		Page int `form:"page"`