"Upcoming volunteers" shows past shifts.

Screenshot from Thursday, 10.55 am, "Upcoming Volunteers" shows volunteers/shifts from Wednesday. Shifts that are in the past should IMO not be shown at all (have their own button, maybe?)

<img width="932" height="237" alt="Image" src="https://github.com/user-attachments/assets/f153ade7-6f15-40eb-b162-4a651311cf5a" />