功能：完善里程边界与氢耗流式统计

go/vehicle-gateway/internal/stats/pure_hydrogen_test.go

@@ -15,16 +15,26 @@ func TestPureHydrogenModeFromEnvelope(t *testing.T) {
 		known  bool
 	}{
 		{
-			name:   "gb32960 fuel cell mode",
-			env:    envelope.FrameEnvelope{Protocol: envelope.ProtocolGB32960, Fields: map[string]any{envelope.FieldFuelCellWorkMode: 2}},
+			name:   "gb32960 hybrid running mode",
+			env:    envelope.FrameEnvelope{Protocol: envelope.ProtocolGB32960, Fields: map[string]any{envelope.FieldVehicleRunningMode: 2}},
 			active: true,
 			known:  true,
 		},
 		{
 			name:  "gb32960 electric mode",
-			env:   envelope.FrameEnvelope{Protocol: envelope.ProtocolGB32960, Fields: map[string]any{envelope.FieldFuelCellWorkMode: 1}},
+			env:   envelope.FrameEnvelope{Protocol: envelope.ProtocolGB32960, Fields: map[string]any{envelope.FieldVehicleRunningMode: 1, envelope.FieldFuelCellWorkMode: 2}},
 			known: true,
 		},
+		{
+			name: "gb32960 fuel running mode is not hydrogen",
+			env:  envelope.FrameEnvelope{Protocol: envelope.ProtocolGB32960, Fields: map[string]any{envelope.FieldVehicleRunningMode: 3}},
+		},
+		{
+			name:   "gb32960 extension fallback",
+			env:    envelope.FrameEnvelope{Protocol: envelope.ProtocolGB32960, Fields: map[string]any{envelope.FieldFuelCellWorkMode: 2}},
+			active: true,
+			known:  true,
+		},
 		{
 			name:   "yutong active mode",
 			env:    envelope.FrameEnvelope{Protocol: envelope.ProtocolYutongMQTT, Fields: map[string]any{envelope.FieldFuelCellWorkMode: json.Number("4")}},
@@ -62,7 +72,7 @@ func TestPureHydrogenModeFromEnvelope(t *testing.T) {
 	}
 }
 
-func TestPureHydrogenMileageDeltaRequiresContinuousKnownActiveMode(t *testing.T) {
+func TestPureHydrogenMileageDeltaUsesCurrentKnownActiveMode(t *testing.T) {
 	tests := []struct {
 		name                          string
 		previousKM, currentKM         float64
@@ -81,15 +91,25 @@ func TestPureHydrogenMileageDeltaRequiresContinuousKnownActiveMode(t *testing.T)
 			want:           6.5,
 		},
 		{
-			name:          "transition into active is unclassified",
+			name:          "transition into active belongs to active interval",
 			previousKM:    100,
 			currentKM:     106.5,
 			previousKnown: true,
 			currentActive: true,
 			currentKnown:  true,
+			want:          6.5,
 		},
 		{
-			name:           "unknown endpoint is unclassified",
+			name:           "previous endpoint can be unknown",
+			previousKM:     100,
+			currentKM:      106.5,
+			previousActive: true,
+			currentActive:  true,
+			currentKnown:   true,
+			want:           6.5,
+		},
+		{
+			name:           "unknown current endpoint is unclassified",
 			previousKM:     100,
 			currentKM:      106.5,
 			previousActive: true,