Current existing functions are:
  1. Creating a schedule (planned schedule) on the left side will directly select the Apple iCloud Calendar.
  2. The focus records on the right side will be synchronized to the calendar named "Session: focus".
Desired changes:
  1. Associate categories with calendars.
  2. Synchronize the schedules created on the left side to the "Session: focus" calendar.
  3. Directly synchronize the focus records on the right side to the corresponding associated calendars.