Update project settings so that we can compile under xcode previews

Multiplatform/Shared/SceneModel.swift

@@ -7,9 +7,20 @@
 //
 
 import Foundation
+import Account
 
 final class SceneModel: ObservableObject {
 	
 	var sidebarModel: SidebarModel?
 	
 }
+
+// MARK: SidebarModelDelegate
+
+extension SceneModel: SidebarModelDelegate {
+	
+	func sidebarSelectionDidChange(_: SidebarModel, feeds: [Feed]?) {
+		print("**** sidebar selection changed ***")
+	}
+	
+}