feat(platform): expose missing vehicle source slots

vehicle-data-platform/apps/api/internal/platform/service.go

@@ -56,6 +56,8 @@ type Service struct {
 	runtime RuntimeInfo
 }
 
+var canonicalVehicleProtocols = []string{"GB32960", "JT808", "YUTONG_MQTT"}
+
 func NewService(store Store) *Service {
 	return &Service{store: store}
 }
@@ -278,6 +280,7 @@ func (s *Service) VehicleDetail(ctx context.Context, vin string, protocol string
 	}
 	sourceStatus := vehicleSourceStatus(vehicles.Items, realtime.Items, history.Items, raw.Items, mileage.Items)
 	sourceStatus = s.enrichVehicleSourceStatus(ctx, queryVIN, sourceStatus)
+	sourceStatus = completeVehicleSourceStatus(sourceStatus, protocol)
 	return VehicleDetail{
 		VIN:               resolvedVIN,
 		LookupKey:         keyword,
@@ -834,6 +837,42 @@ func vehicleSourceStatus(vehicles []VehicleRow, realtime []RealtimeLocationRow,
 	return out
 }
 
+func completeVehicleSourceStatus(statuses []VehicleSourceStatus, protocol string) []VehicleSourceStatus {
+	protocol = strings.TrimSpace(protocol)
+	if protocol != "" {
+		for _, status := range statuses {
+			if status.Protocol == protocol {
+				return []VehicleSourceStatus{status}
+			}
+		}
+		return []VehicleSourceStatus{{Protocol: protocol}}
+	}
+	byProtocol := map[string]VehicleSourceStatus{}
+	for _, status := range statuses {
+		if strings.TrimSpace(status.Protocol) == "" {
+			continue
+		}
+		byProtocol[status.Protocol] = status
+	}
+	out := make([]VehicleSourceStatus, 0, len(canonicalVehicleProtocols)+len(statuses))
+	seen := map[string]struct{}{}
+	for _, protocol := range canonicalVehicleProtocols {
+		if status, ok := byProtocol[protocol]; ok {
+			out = append(out, status)
+		} else {
+			out = append(out, VehicleSourceStatus{Protocol: protocol})
+		}
+		seen[protocol] = struct{}{}
+	}
+	for _, status := range statuses {
+		if _, ok := seen[status.Protocol]; ok || strings.TrimSpace(status.Protocol) == "" {
+			continue
+		}
+		out = append(out, status)
+	}
+	return out
+}
+
 func buildVehicleServiceStatus(resolved bool, statuses []VehicleSourceStatus) *VehicleServiceStatus {
 	if !resolved {
 		return &VehicleServiceStatus{