refactor: small code improvements

apps/client/src/features/rundown/rundown.utils.ts

@@ -160,7 +160,7 @@ export function makeSortableList(order: EntryId[], entries: RundownEntries): Ent
  * Checks whether a drop operation is valid
  * Currently only used for validating dropping groups
  */
-export function canDrop(targetType?: SupportedEntry & 'end-group', targetParent?: EntryId | null): boolean {
+export function canDrop(targetType?: SupportedEntry | 'end-group', targetParent?: EntryId | null): boolean {
   // this would mean inserting a group inside another
   if (targetType === 'end-group') {
     return false;

apps/client/src/features/rundown/useEventSelection.ts

@@ -103,7 +103,11 @@ export const useEventSelection = create<EventSelectionStore>()((set, get) => ({
   clearMultiSelect: () => {
     const { selectedEvents } = get();
     const [firstSelected] = selectedEvents;
-    set({ selectedEvents: new Set(firstSelected || undefined), anchoredIndex: null, entryMode: null });
+    set({
+      selectedEvents: new Set(firstSelected ? [firstSelected] : []),
+      anchoredIndex: null,
+      entryMode: null,
+    });
   },
   unselect: (id: string) => {
     const { entryMode, selectedEvents } = get();