pub fn signal_summary(signal: &UiSignal) -> Option<(Icon, String)>Expand description
One-line summary of a UiSignal for live-frontend display.
Returns None for the structured signals that frontends handle
out-of-band (UiSignal::CeremonyOverview, UiSignal::SystemInfo,
UiSignal::Environment), which populate structured fields rather than a
single narration line.