Improve handling of alerts when no active alerts are present

internal/briefing/daily.go

@@ -81,6 +81,7 @@ func BuildDaily(ctx BuildContext, summary *forecast.DailySummary) (Package, erro
 			ForecastSummaryDate: summary.Date,
 		},
 	}
+	setRelevantAlertCount(&pkg.Metadata, len(summary.AlertOverlaps))
 	if ctx.Resolved.Definition.ID == report.DailyTomorrow {
 		pkg.Daily.Planning = buildTomorrowPlanning(summary)
 	}