fix(timeline): use backend timestep

src/components/olmap/core/MapComponent.tsx

@@ -33,6 +33,7 @@ import {
 } from "./mapLifecycle";
 import { createOperationalMapResources } from "./operationalLayers";
 import { getRoundedCurrentTimelineMinutes } from "./Controls/timelineTime";
+import { useTimelineTimeConfig } from "./Controls/useTimelineTimeConfig";
 
 interface MapComponentProps {
   children?: React.ReactNode;
@@ -140,6 +141,7 @@ const MapComponent: React.FC<MapComponentProps> = ({ children }) => {
   ];
   const MAP_URL = config.MAP_URL;
   const MAP_VIEW_STORAGE_KEY = `${MAP_WORKSPACE}_map_view`; // 持久化 key
+  const { durationMinutes, stepMinutes } = useTimelineTimeConfig();
 
   const mapRef = useRef<HTMLDivElement | null>(null);
   const canvasRef = useRef<HTMLCanvasElement | null>(null);
@@ -778,7 +780,9 @@ const MapComponent: React.FC<MapComponentProps> = ({ children }) => {
   }, [compareMap, isCompareMode, map]);
 
   useEffect(() => {
-    setCurrentTime(getRoundedCurrentTimelineMinutes());
+    setCurrentTime(
+      getRoundedCurrentTimelineMinutes(new Date(), stepMinutes, durationMinutes),
+    );
     setSelectedDate(new Date());
     setSchemeName("");
     setCurrentJunctionCalData([]);
@@ -803,7 +807,7 @@ const MapComponent: React.FC<MapComponentProps> = ({ children }) => {
       deckLayerRef.current?.resetSessionLayers();
       operationalResources.resetStyles();
     };
-  }, [pathname, map, operationalResources]);
+  }, [durationMinutes, pathname, map, operationalResources, stepMinutes]);
 
   // 当数据变化时，更新 deck.gl 图层
   useEffect(() => {