feat(monitor): retain authorized vehicles without locations

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

@@ -411,6 +411,10 @@ func (bounds monitorBounds) contains(longitude, latitude float64) bool {
 	return longitude >= bounds.minLongitude && longitude <= bounds.maxLongitude && latitude >= bounds.minLatitude && latitude <= bounds.maxLatitude
 }
 
+func validRealtimeCoordinate(longitude, latitude float64) bool {
+	return longitude >= -180 && longitude <= 180 && latitude >= -90 && latitude <= 90 && (longitude != 0 || latitude != 0)
+}
+
 func monitorVehicleStatus(row VehicleRealtimeRow) string {
 	if strings.TrimSpace(row.LastSeen) == "" {
 		return "unknown"
@@ -480,6 +484,9 @@ func vehicleSearchKeywords(query url.Values) []string {
 
 func matchesMonitorStatus(row VehicleRealtimeRow, requested string) bool {
 	requested = strings.TrimSpace(requested)
+	if requested == "no_location" {
+		return !row.LocationAvailable
+	}
 	return requested == "" || monitorVehicleStatus(row) == requested || requested == "online" && row.Online
 }
 
@@ -522,6 +529,11 @@ func (s *Service) buildMonitorSummary(ctx context.Context, query url.Values, veh
 			continue
 		}
 		result.TotalVehicles++
+		if vehicle.LocationAvailable {
+			result.LocationVehicles++
+		} else {
+			result.NoLocationVehicles++
+		}
 		if _, active := activeAlertVINs[vehicle.VIN]; active {
 			result.AlertVehicles++
 		}
@@ -607,10 +619,10 @@ func buildMonitorMapResponse(vehicles Page[VehicleRealtimeRow], query url.Values
 		if !matchesMonitorStatus(vehicle, query.Get("status")) {
 			continue
 		}
-		result.Total++
-		if vehicle.Longitude < 73 || vehicle.Longitude > 135 || vehicle.Latitude < 18 || vehicle.Latitude > 54 {
+		if !vehicle.LocationAvailable || vehicle.Longitude < 73 || vehicle.Longitude > 135 || vehicle.Latitude < 18 || vehicle.Latitude > 54 {
 			continue
 		}
+		result.Total++
 		if hasBounds && !bounds.contains(vehicle.Longitude, vehicle.Latitude) {
 			continue
 		}