Provider: show the electric range with the climate control on

MyToyota reports two range figures for an EV, and only one of them was
reaching the readings: evRangeWithAc was listed as a fallback alias for
evRange, so on a car that reports both — every bZ4X — the first key won
and the second was never shown. It is its own reading now. The gap
between the two is the useful part: it is what running the A/C costs you.

Both are labelled for the pair, "Electric range (A/C off)" beside
"Electric range (A/C on)", so neither figure is left ambiguous now that
they sit next to each other.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

API Server/internal/api/vehicleproviders_test.go

@@ -160,7 +160,8 @@ func TestFlattenJSONTruncates(t *testing.T) {
 func TestHeadlineMetrics(t *testing.T) {
 	trees := []any{
 		decode(t, `{"payload": {"odometer": {"value": 270185, "unit": "km"}, "fuelLevel": 62}}`),
-		decode(t, `{"payload": {"batteryLevel": 80, "chargingStatus": "charging"}}`),
+		decode(t, `{"payload": {"batteryLevel": 80, "chargingStatus": "charging",
+			"evRange": {"value": 412, "unit": "km"}, "evRangeWithAc": {"value": 389, "unit": "km"}}}`),
 		decode(t, `{"payload": {"vehicleLocation": {"latitude": 52.2297, "longitude": 21.0122}}}`),
 	}
 	got := map[string]providerMetric{}
@@ -180,6 +181,14 @@ func TestHeadlineMetrics(t *testing.T) {
 	if got["chargingStatus"].Value != "charging" {
 		t.Errorf("chargingStatus = %+v", got["chargingStatus"])
 	}
+	// Range with the climate control on is its own reading, so a payload that
+	// reports both shows both rather than one standing in for the other.
+	if got["evRange"].Value != "412" || got["evRange"].Unit != "km" {
+		t.Errorf("evRange = %+v", got["evRange"])
+	}
+	if got["evRangeWithAc"].Value != "389" || got["evRangeWithAc"].Unit != "km" {
+		t.Errorf("evRangeWithAc = %+v", got["evRangeWithAc"])
+	}
 	if got["location"].Value != "52.22970, 21.01220" {
 		t.Errorf("location = %+v", got["location"])
 	}