fix: weekbased calculation pdf report

with this change the time calculations for pdf reports should be better
line with the reports send as "week_report"

Backend/models/iworkday.go

@@ -55,7 +55,9 @@ func GetDays(user User, tsFrom, tsTo time.Time, orderedForward bool) []IWorkDay
 	}
 
 	for _, absentDay := range absences {
-
+		if weekDay := absentDay.Date().Weekday(); weekDay == time.Saturday || weekDay == time.Sunday {
+			continue
+		}
 		// Check if there is already a day
 		existingDay, ok := allDays[absentDay.Date().Format(time.DateOnly)]
 		switch {