Add creation commit handler to ViewportCanvas

src/viewport-three/ViewportCanvas.tsx

@@ -158,6 +158,10 @@ export function ViewportCanvas({
     });
   }, [onToolPreviewChange, panelId]);
 
+  useEffect(() => {
+    hostRef.current?.setCreationCommitHandler(onCommitCreation);
+  }, [onCommitCreation]);
+
   useEffect(() => {
     hostRef.current?.setToolMode(toolMode);
   }, [toolMode]);