Bug: Wrong graph visualization in studio with the new Command

Steps to simulate de bug:

1.- implement the Graph from the new Command documentation example: https://langchain-ai.github.io/langgraphjs/how-tos/command/#define-graph
2.- Open the Studio url witn langgraph up.
3.- The Graph representation is not correct as you can see at the attached image:


Start with the new Command graph in the linked documentation example, run it with langgraph up, and open the Studio URL to reproduce the incorrect visualization shown in the attachment. Trace the Studio graph rendering from that reproduced graph and verify that the displayed representation matches the graph definition.

Written by the indexing model from the issue text.