Rotation: Incorrect `First handoff` calculation

[sukhwinder33445]

Given:

Day: Monday
Current Date: 30.06.2025
Current Time: 12:45 AM

Case 1 (Mode => Partial Day):

The first handoff message is incorrect because the end time is in the past.

Case 2 (Mode => Multi Day):

The first handoff message is incorrect. The rotation will end on Monday 12:00 AM (end of Sunday), so the 1 PM is out off scope here.
Note: From At: 1PM > Current Time (12:45PM)

Case 3 (Mode => Multi Day):

Same as above.
Note: From At: 12:30PM < Current Time (12:45PM)