Validate the complete replacement before touching current alerts or their visuals.
Parameters
input: unknown
Returns void
hovered
hovered():undefined|string
The alert the pointer is over, or none.
Offered so a host can bind a key to it. The controller does not bind keys
itself: it owns no input and a chart embedded without the widget shell has
its own idea of what a keystroke means.
Headless, chart-owned trader alerts. Hosts subscribe to alert:triggered for delivery.