Complete canvas scope wiring and use Tokio for mounted Scenario test

crates/oa-desktop/src/app/process_canvas.rs

@@ -65,6 +65,7 @@ impl App {
                 owner: context.owner,
                 revision: context.revision,
                 epoch: lifetime,
+                scenario_view: None,
             };
             if self.behavior.has_pending()
                 || self.draft_dirty()

crates/oa-desktop/src/app/scenario_diagram/adoption_tests.rs

@@ -166,9 +166,8 @@ fn source_cross_layer_owner_retarget_undo_redo_keeps_requested_saved_uuid() {
     retarget(true);
 }
 
-#[test]
-fn source_deleted_owner_and_saved_view_mount_unavailable_instead_of_another_behavior() {
-    iced::futures::executor::block_on(async {
+#[tokio::test]
+async fn source_deleted_owner_and_saved_view_mount_unavailable_instead_of_another_behavior() {
     let mut f = fixture();
     let before = f.app.document.snapshot();
     let mut expected = before.decoded.project.clone();
@@ -225,7 +224,6 @@ fn source_deleted_owner_and_saved_view_mount_unavailable_instead_of_another_beha
     );
     assert_eq!(f.app.project(), &expected);
     assert_eq!(f.app.document.bundle(), &adopted.bundle);
-    });
 }
 
 #[test]