8079ab3d4d
ViewerApp is simplified, interacting with the endpoint and handlers through the Viewer instance. This change makes it possible to write simulation viewers without using the UI/UX provided by ViewerApp (which should be renamed StudioApp) PiperOrigin-RevId: 943642660 Change-Id: Id8eb3d4e6a27ceda93833367fec4699fa6bc838e