feat(platform): add online vehicle statistics detail

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

@@ -909,6 +909,56 @@ func (s *Service) OnlineStatisticsSummary(ctx context.Context, query url.Values)
 	}, nil
 }
 
+func (s *Service) OnlineVehicleStatuses(ctx context.Context, query url.Values) (Page[OnlineVehicleStatusRow], error) {
+	resolvedQuery, err := s.resolveVehicleQuery(ctx, query)
+	if err != nil {
+		return Page[OnlineVehicleStatusRow]{}, err
+	}
+	coverage, err := s.store.VehicleCoverage(ctx, resolvedQuery)
+	if err != nil {
+		return Page[OnlineVehicleStatusRow]{}, err
+	}
+	now := time.Now()
+	items := make([]OnlineVehicleStatusRow, 0, len(coverage.Items))
+	for _, row := range coverage.Items {
+		items = append(items, OnlineVehicleStatusRow{
+			VIN:                    row.VIN,
+			Plate:                  row.Plate,
+			Phone:                  row.Phone,
+			OEM:                    row.OEM,
+			Protocols:              append([]string(nil), row.Protocols...),
+			Online:                 row.Online,
+			LastSeen:               row.LastSeen,
+			OfflineDurationMinutes: offlineDurationMinutes(row.Online, row.LastSeen, now),
+			SourceCount:            row.SourceCount,
+			OnlineSourceCount:      row.OnlineSourceCount,
+			BindingStatus:          row.BindingStatus,
+		})
+	}
+	return Page[OnlineVehicleStatusRow]{
+		Items:  items,
+		Total:  coverage.Total,
+		Limit:  coverage.Limit,
+		Offset: coverage.Offset,
+	}, nil
+}
+
+func offlineDurationMinutes(online bool, lastSeen string, now time.Time) *int {
+	if online {
+		value := 0
+		return &value
+	}
+	parsed, ok := parseVehicleServiceTime(lastSeen)
+	if !ok {
+		return nil
+	}
+	minutes := int(now.Sub(parsed).Minutes())
+	if minutes < 0 {
+		minutes = 0
+	}
+	return &minutes
+}
+
 func (s *Service) QualitySummary(ctx context.Context, query url.Values) (QualitySummary, error) {
 	return s.store.QualitySummary(ctx, query)
 }