Previously, toggling AI Commands in the Agents view would show a pending state
and wait for the agent to confirm the change (up to 2 minutes). If the agent
was slow to report or the WebSocket update was missed, the toggle would appear
stuck.
Now, UpdateHostAgentConfig also updates the Host model in state immediately,
providing instant UI feedback. The agent will still receive the config on its
next report, but users see the change right away.
Added SetHostCommandsEnabled function to models.State for this purpose.
