code to enable swiping through categories

YourLibraryView_categorySwipe_SwiftUI.swift

.onPageChanged({ _ in
    self.allowSubCategoryDragging = true
})
.swipeInteractionArea(.allAvailable)
.simultaneousGesture(DragGesture().onChanged({value in
    /// catch moving to category
    if self.allowSubCategoryDragging {
        let movingCategoryRight = self.page == 0 && self.nestedPages[self.page] == 2 && value.translation.width < 0
        let movingCategoryLeft = self.page == 1 && self.nestedPages[self.page] == 0 && value.translation.width > 0
        if movingCategoryRight || movingCategoryLeft{
            self.allowSubCategoryDragging = false
        }
    }
}