Expand description
Notification toast handlers. Both the plain-message and the
progress-bar variants go through here; each emits on an
SkyEvent::Notification* channel so Sky’s toast stack renders
without a round-trip back through Mountain.
Note: these are the Wind-facing IPC invocations (called from the
renderer’s INotificationService). The Cocoon-side notification
path for extensions lives in Vine::Server::Notification::*.