功能：完善里程边界与氢耗流式统计

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

@@ -15,14 +15,40 @@ const (
 	yutongFuelCellDrivingMode     = 11
 )
 
-// PureHydrogenModeFromEnvelope returns whether the reported vehicle is in a
-// fuel-cell-only work mode and whether the source value is understood.
+// PureHydrogenModeFromEnvelope returns whether hydrogen power participates in
+// vehicle propulsion and whether the source value is understood.
 //
-// The 32960 fuel-cell extension reports engine_work_state; production frames
-// use mode 2 for normal fuel-cell operation. Yutong reports the equivalent
-// state through TRIANGLE_STATE; production frames use 1 for inactive and 4/11
-// for active fuel-cell operating modes.
+// GB32960's standard vehicle running mode is authoritative when present:
+// mode 1 is pure electric, mode 2 is hybrid, and mode 3 is fuel powered. Mode
+// 2 is counted as hydrogen-participating mileage for the hydrogen fleet; mode
+// 1 is excluded. Fuel, abnormal, and invalid values are left unclassified.
+// Older frames without the standard field fall back to the fuel-cell extension
+// engine_work_state. Yutong reports the equivalent state through
+// TRIANGLE_STATE; production frames use 1 for inactive and 4/11 for active.
 func PureHydrogenModeFromEnvelope(env envelope.FrameEnvelope) (active bool, known bool) {
+	if env.Protocol == envelope.ProtocolGB32960 {
+		if value, exists := env.Fields[envelope.FieldVehicleRunningMode]; exists {
+			mode, ok := integerMode(value)
+			if !ok {
+				return false, false
+			}
+			switch mode {
+			case 1:
+				return false, true
+			case 2:
+				return true, true
+			default:
+				return false, false
+			}
+		}
+	}
+	return FuelCellActiveModeFromEnvelope(env)
+}
+
+// FuelCellActiveModeFromEnvelope reads the fuel-cell subsystem work state.
+// Hydrogen consumption segmentation uses this signal (and its current-based
+// fallback) independently from the whole-vehicle running mode used by mileage.
+func FuelCellActiveModeFromEnvelope(env envelope.FrameEnvelope) (active bool, known bool) {
 	value, exists := env.Fields[envelope.FieldFuelCellWorkMode]
 	if !exists {
 		return false, false
@@ -56,8 +82,9 @@ func PureHydrogenModeFromEnvelope(env envelope.FrameEnvelope) (active bool, know
 }
 
 // PureHydrogenMileageDelta returns the odometer delta that can be attributed
-// to pure-hydrogen operation. Both endpoints must report a known active mode;
-// this deliberately leaves transitions and missing mode data unclassified.
+// to hydrogen-participating operation. The current endpoint owns the interval,
+// matching the daily rule: total mileage minus intervals ending in pure-electric
+// mode. Missing or invalid current modes remain unclassified.
 func PureHydrogenMileageDelta(
 	previousKM float64,
 	currentKM float64,
@@ -67,7 +94,7 @@ func PureHydrogenMileageDelta(
 	currentKnown bool,
 ) float64 {
 	delta := currentKM - previousKM
-	if !previousKnown || !previousActive || !currentKnown || !currentActive {
+	if !currentKnown || !currentActive {
 		return 0
 	}
 	if delta < 0 || delta > maxSelectedDailyMileageKM {