v2.2.1

Fixed

• CalendarView: single-resource installs never showed availability shading. The resource
  filter only renders when there are 2+ resources, and nothing auto-selected the sole
  resource — so week/day views never loaded shift windows, full/time-off shading, or the
  new external slots. The sole resource is now auto-selected; installs with multiple
  resources are unchanged (selection stays manual via the filter).