Wire the async source runtimes into the hosts

desktop/src/app.rs

@@ -97,6 +97,11 @@ impl App {
 		});
 		let desktop_wrapper = DesktopWrapper::new(rand::rng().random(), Arc::new(resource_storage), dirs::app_autosave_documents_dir(), wgpu_context.clone(), wake);
 
+		let completion_render_sender = start_render_sender.clone();
+		DesktopWrapper::set_completion_notifier(move || {
+			let _ = completion_render_sender.try_send(());
+		});
+
 		Self {
 			render_state: None,
 			wgpu_context,

desktop/wrapper/src/lib.rs

@@ -52,6 +52,10 @@ impl DesktopWrapper {
 		executor.execute()
 	}
 
+	pub fn set_completion_notifier(notifier: impl Fn() + Send + Sync + 'static) {
+		graphite_editor::node_graph_executor::set_completion_notifier(Arc::new(notifier));
+	}
+
 	pub async fn execute_node_graph() -> NodeGraphExecutionResult {
 		let result = graphite_editor::node_graph_executor::run_node_graph().await;
 		match result {