Event: Preserve Event Duration When Rescheduling via Akiflow

When rescheduling events in Akiflow, the tool currently shifts the start date/time but retains the original end-time, which can lead to incorrect durations.

Example:

• Original event: Today at 3:00 PM – 3:30 PM (30 minutes)

• When rescheduled to tomorrow at 10:00 AM, Akiflow sets it as 10:00 AM – 3:30 PM

• Expected behavior: The event should be rescheduled to 10:00 AM – 10:30 AM, preserving the original 30-minute duration.