Add daily planning module

internal/briefing/summary_helpers.go

@@ -28,6 +28,12 @@ type TomorrowPlanning struct {
 	OvernightChangeWatch         []string
 }
 
+type morningCommuteOvernightPlanning struct {
+	MorningReadiness             []string
+	CommuteSchoolWorkdayConcerns []string
+	OvernightChangeWatch         []string
+}
+
 type TodayPlanning struct {
 	MorningReadiness             []string
 	CommuteSchoolWorkdayConcerns []string
@@ -99,7 +105,16 @@ func buildTodayPlanning(summary *forecast.DailySummary) *TodayPlanning {
 }
 
 func buildTomorrowPlanning(summary *forecast.DailySummary) *TomorrowPlanning {
-	planning := &TomorrowPlanning{}
+	base := buildMorningCommuteOvernightPlanning(summary)
+	return &TomorrowPlanning{
+		MorningReadiness:             append([]string(nil), base.MorningReadiness...),
+		CommuteSchoolWorkdayConcerns: append([]string(nil), base.CommuteSchoolWorkdayConcerns...),
+		OvernightChangeWatch:         append([]string(nil), base.OvernightChangeWatch...),
+	}
+}
+
+func buildMorningCommuteOvernightPlanning(summary *forecast.DailySummary) *morningCommuteOvernightPlanning {
+	planning := &morningCommuteOvernightPlanning{}
 	morning := daypartNamed(summary.Dayparts, "morning")
 	if morning != nil {
 		planning.MorningReadiness = append(planning.MorningReadiness, readinessNotes(*morning)...)