Revise the report template for the tomorrow report.

internal/reporttemplate/reporttemplate_test.go

@@ -220,23 +220,39 @@ func TestRenderTomorrow(t *testing.T) {
 		},
 		Modules: testTomorrowModules{
 			Dayparts: []testTomorrowDaypart{
+				{
+					Key: "overnight",
+					Summary: testDaypartSummary{
+						DisplayName:              "Overnight",
+						TemperatureTrend:         "falling",
+						TemperatureStartPhraseF:  "mid 60s",
+						TemperatureEndPhraseF:    "upper 50s",
+						DominantConditionDisplay: "Partly cloudy",
+						DominantConditionLower:   "partly cloudy",
+					},
+				},
 				{
 					Key: "morning",
 					Summary: testDaypartSummary{
-						DisplayName:            "Morning",
-						TemperaturePhraseF:     "low 60s",
-						DominantConditionLower: "partly cloudy",
+						DisplayName:              "Morning",
+						TemperatureTrend:         "rising",
+						TemperatureStartPhraseF:  "upper 50s",
+						TemperatureEndPhraseF:    "upper 60s",
+						DominantConditionDisplay: "Sunny",
+						DominantConditionLower:   "sunny",
 					},
 				},
 				{
 					Key: "afternoon",
 					Summary: testDaypartSummary{
-						DisplayName:            "Afternoon",
-						TemperaturePhraseF:     "mid 70s",
-						DominantConditionLower: "showers",
-						MaxPopPercent:          intPtr(70),
-						MaxPopTimeLabel:        "3:00 PM",
-						MentionPrecipitation:   true,
+						DisplayName:              "Afternoon",
+						TemperatureTrend:         "steady",
+						TemperatureSteadyPhraseF: "upper 70s",
+						DominantConditionDisplay: "Sunny",
+						DominantConditionLower:   "sunny",
+						MaxPopPercent:            intPtr(70),
+						MaxPopTimeLabel:          "3:00 PM",
+						MentionPrecipitation:     true,
 					},
 				},
 			},
@@ -256,8 +272,9 @@ func TestRenderTomorrow(t *testing.T) {
 		"**Forecast date:** Monday, June 15, 2026",
 		"**Updated:** Sunday, June 14, 2026 at 9:14 AM",
 		"Tomorrow starts dry before showers return later in the day.",
-		"- **Morning:** low 60s and partly cloudy.",
-		"- **Afternoon:** mid 70s and showers. Precipitation chances peak at 70% at 3:00 PM.",
+		"- **Overnight:** Partly cloudy, with temperatures falling from the mid 60s to the upper 50s.",
+		"- **Morning:** Sunny, with temperatures rising from the upper 50s to the upper 60s.",
+		"- **Afternoon:** Sunny, with temperatures in the upper 70s. Chance of precipitation is 70%.",
 		"- **3:00 PM** to **6:00 PM**: Precipitation is expected during this period. The peak precipitation chance is 70% at 3:00 PM.",
 		"A few showers may linger into early evening.",
 		"Clouds increase after sunrise.",
@@ -267,9 +284,18 @@ func TestRenderTomorrow(t *testing.T) {
 			t.Fatalf("rendered template missing %q:\n%s", want, text)
 		}
 	}
+	for _, unwanted := range []string{
+		"upper 50s.\n\n- **Morning:**",
+		"upper 60s.\n\n- **Afternoon:**",
+	} {
+		if strings.Contains(text, unwanted) {
+			t.Fatalf("rendered template includes blank lines between daypart bullets:\n%s", text)
+		}
+	}
 	assertOrderedText(t, text, []string{
 		"# Monday's Weather",
 		"## Daypart Forecast",
+		"- **Overnight:**",
 		"- **Morning:**",
 		"- **Afternoon:**",
 		"## Precipitation Timing",
@@ -296,9 +322,11 @@ func TestRenderTomorrowOmitsPrecipitationTimingWithoutWindows(t *testing.T) {
 				{
 					Key: "morning",
 					Summary: testDaypartSummary{
-						DisplayName:            "Morning",
-						TemperaturePhraseF:     "low 60s",
-						DominantConditionLower: "clear",
+						DisplayName:              "Morning",
+						TemperatureTrend:         "steady",
+						TemperatureSteadyPhraseF: "low 60s",
+						DominantConditionDisplay: "Clear",
+						DominantConditionLower:   "clear",
 					},
 				},
 			},
@@ -436,15 +464,21 @@ type testTomorrowDaypart struct {
 }
 
 type testDaypartSummary struct {
-	DisplayName            string
-	TempRangeF             string
-	TemperaturePhraseF     string
-	MaxPopPercent          *int
-	MaxPopTime             string
-	MaxPopTimeLabel        string
-	MentionPrecipitation   bool
-	DominantCondition      string
-	DominantConditionLower string
+	DisplayName              string
+	TempRangeF               string
+	TemperaturePhraseF       string
+	TemperatureTrend         string
+	TemperatureStartPhraseF  string
+	TemperatureEndPhraseF    string
+	TemperaturePeakPhraseF   string
+	TemperatureSteadyPhraseF string
+	MaxPopPercent            *int
+	MaxPopTime               string
+	MaxPopTimeLabel          string
+	MentionPrecipitation     bool
+	DominantCondition        string
+	DominantConditionLower   string
+	DominantConditionDisplay string
 }
 
 type testCurrentConditions struct {