The session UI panel was not updating when networking started via
control socket because poll_engine_events used commands.insert_resource
which queued updates until end of schedule. The UI could run before
the command was applied.
Fixed by:
- Initialize CurrentSession at startup in offline state (session.rs)
- Use direct ResMut mutation in poll_engine_events (engine_bridge.rs)
- Check session.state instead of resource existence (session_ui.rs)
This ensures Bevy's change detection triggers immediately when engine
events update the session state.
Refs #131, #132
Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>
