Channels + events to subscribe on install.
OptionalonMap an incoming broadcast to the bus. Default: bus.emit(event, payload) so
on(event) listeners fire. Provide this to dispatch a command instead, or
to rename/drop events.
OptionalpresenceFor presence channels, also emit membership changes as bus events
"<name>:here", "<name>:joining", "<name>:leaving". Default: true.
A configured laravel-echo instance (or any object exposing
channel(name)/private(name)/join(name)andleave(name)). The bridge takes your app's Echo so it never imports laravel-echo itself — keeping vapor-chamber backend-agnostic and the dependency out of the bundle.