fix: RoutePanel 시종점 역사(역사 카테고리) POI에서 km 최소/최대로 표시

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

client/src/components/overlay/RoutePanel.tsx

@@ -93,23 +93,23 @@ export default function RoutePanel({ currentTime, visible, onSeek }: RoutePanelP
       .catch(() => {});
   }, [visible, droneFramesLoaded]);
 
-  // 시점/종점: 드론 첫/마지막 프레임에서 가장 가까운 역 이름
+  // 시점/종점: 역사(category=역사) POI 중 km 최소/최대
   useEffect(() => {
-    if (!droneFramesLoaded || !stations.length) return;
-    const frames = allDroneFramesRef.current;
-    if (!frames.length) return;
-    const nearest = (f: DroneFrameBasic) => {
-      let best = stations[0];
-      let bestD = (f.lat - best.lat) ** 2 + (f.lon - best.lon) ** 2;
-      for (let i = 1; i < stations.length; i++) {
-        const d = (f.lat - stations[i].lat) ** 2 + (f.lon - stations[i].lon) ** 2;
-        if (d < bestD) { best = stations[i]; bestD = d; }
+    if (!stations.length || !pois.length) return;
+    const validSt = stations.filter(s => stationKm(s.title) >= 0);
+    if (!validSt.length) return;
+    const stationPois = pois.filter(p => p.category === '\uC5ED\uC0AC'); // 역사
+    if (!stationPois.length) return;
+    let minKmPoi = stationPois[0], maxKmPoi = stationPois[0];
+    let minK = poiKm(stationPois[0], validSt), maxK = minK;
+    for (let i = 1; i < stationPois.length; i++) {
+      const k = poiKm(stationPois[i], validSt);
+      if (k >= 0 && k < minK) { minK = k; minKmPoi = stationPois[i]; }
+      if (k >= 0 && k > maxK) { maxK = k; maxKmPoi = stationPois[i]; }
     }
-      return best.title;
-    };
-    setRouteStartTitle(nearest(frames[0]));
-    setRouteEndTitle(nearest(frames[frames.length - 1]));
-  }, [droneFramesLoaded, stations]);
+    setRouteStartTitle(minKmPoi.title);
+    setRouteEndTitle(maxKmPoi.title);
+  }, [stations, pois]);
 
   // Update current km and visible range based on currentTime
   useEffect(() => {