feat: 产品/客户/订单批量删除；接入 GeoLite2 城市库（地理分布/激活记录/审计日志显示归属地）；仪表盘趋势图美化

backend/internal/service/setting/setting_service.go

@@ -4,6 +4,7 @@ import (
 	"backend/internal/dto"
 	"backend/internal/model"
 	"backend/internal/service/payment"
+	"backend/utils"
 	"errors"
 	"fmt"
 	"net/url"
@@ -728,6 +729,7 @@ func (s *SettingService) ListAuditLogs(page, pageSize int, action, targetType st
 			Detail:     l.Detail,
 			Result:     l.Result,
 			IP:         l.IP,
+			Location:   utils.LookupIPLocation(l.IP),
 			CreatedAt:  l.CreatedAt.Format("2006-01-02 15:04:05"),
 		})
 	}