feat: anchor point for working set

src/backend/openxr/mod.rs

@@ -334,6 +334,8 @@ pub fn openxr_run(running: Arc<AtomicBool>) -> Result<(), BackendError> {
                 TaskType::Overlay(sel, f) => {
                     if let Some(o) = overlays.mut_by_selector(&sel) {
                         f(&mut app_state, &mut o.state);
+                    } else {
+                        log::warn!("Overlay not found for task: {:?}", sel);
                     }
                 }
                 TaskType::CreateOverlay(sel, f) => {