Hi @Delwar_Hossain Thanks for the Feature request!
Local Agent and Chat history stay on the device today, so the context you build on one machine does not follow your account to another. That is expected right now, and it is a common request. We have passed it along to the team. No timeline to share yet, but I will post here if there is an update.
Related thread, if you want to follow along: Cloud Sync for Chat History