fix：时长一号累计

domain/model/mic_m/mic.go

@@ -100,7 +100,7 @@ func MGetUserOnMicSecondsRange(model *domain.Model, beginDate, endDate string, t
 		return res, err
 	}
 	for _, r := range rows {
-		res[r.UserId] = r.Seconds
+		res[r.UserId] += r.Seconds
 	}
 	return res, nil
 }