Day break ignores day start time

Inserting Day break and update times produces a schedule with day 2 starting at 09:30 when the overall start time has been set to 09:00

<img width="615" height="760" alt="Image" src="https://github.com/user-attachments/assets/3913e41b-77a6-42ee-b584-ac9b278bffef" />