fix: Giữ nguyên zoom/center của người dùng khi bản đồ resize trên mobile

- Thêm userInteractedRef để theo dõi người dùng đã zoom/drag chưa
- FitBounds chỉ chạy khi người dùng chưa tương tác
- MapSizeHandler lưu center/zoom trước khi invalidateSize, khôi phục sau nếu user đã tương tác
- MapRotationHandler xóa transform thay vì set rotate(0) khi compass tắt
- Ngăn map tự động reset về mức zoom ban đầu sau khi người dùng pinch-zoom

frontend/src/pages/TourNavigationPage.tsx

@@ -16,13 +16,13 @@ interface TourNavigationPageProps {
   onBack: () => void;
 }
 
-const FitBounds = ({ coords }: { coords: [number, number][] }) => {
+const FitBounds = ({ coords, userInteractedRef }: { coords: [number, number][], userInteractedRef: React.MutableRefObject<boolean> }) => {
   const map = useMap();
   useEffect(() => {
-    if (coords.length > 0) {
+    if (coords.length > 0 && !userInteractedRef.current) {
       map.fitBounds(coords, { padding: [60, 60], maxZoom: 15 });
     }
-  }, [map, coords]);
+  }, [map, coords, userInteractedRef]);
   return null;
 };
 
@@ -69,14 +69,24 @@ const CompassInteractionDetector = ({
   return null;
 };
 
-const MapSizeHandler = () => {
+const MapSizeHandler = ({ mapRef, userInteractedRef }: { mapRef: React.MutableRefObject<L.Map | null>, userInteractedRef: React.MutableRefObject<boolean> }) => {
   const map = useMap();
   useEffect(() => {
     const timer = setTimeout(() => {
-      map.invalidateSize();
+      if (!mapRef.current) return;
+      
+      const hadUserInteracted = userInteractedRef.current;
+      const currentCenter = map.getCenter();
+      const currentZoom = map.getZoom();
+      
+      mapRef.current.invalidateSize();
+      
+      if (hadUserInteracted) {
+        mapRef.current.setView(currentCenter, currentZoom, { animate: false });
+      }
     }, 100);
     return () => clearTimeout(timer);
-  }, [map]);
+  }, [map, mapRef, userInteractedRef]);
   return null;
 };
 
@@ -85,12 +95,28 @@ export const TourNavigationPage: React.FC<TourNavigationPageProps> = ({ tourId,
   const [currentHeading, setCurrentHeading] = useState(0);
   const [routeGeometry, setRouteGeometry] = useState<[number, number][] | null>(null);
   const [error, setError] = useState<string | null>(null);
-  const [mapReady, setMapReady] = useState(false);
+  const userInteractedRef = useRef(false);
 
   const mapRef = useRef<L.Map | null>(null);
   const watchIdRef = useRef<number | null>(null);
   const fetchLockRef = useRef(false);
 
+  useEffect(() => {
+    const map = mapRef.current;
+    if (!map) return;
+    
+    const onZoomEnd = () => { userInteractedRef.current = true; };
+    const onMoveEnd = () => { userInteractedRef.current = true; };
+    
+    map.on('zoomend', onZoomEnd);
+    map.on('moveend', onMoveEnd);
+    
+    return () => {
+      map.off('zoomend', onZoomEnd);
+      map.off('moveend', onMoveEnd);
+    };
+  }, [mapRef.current]);
+
   const originLat = routeData?.origin?.lat;
   const originLng = routeData?.origin?.lng;
   const destLat = routeData?.destination?.lat;
@@ -234,8 +260,9 @@ export const TourNavigationPage: React.FC<TourNavigationPageProps> = ({ tourId,
           minZoom={2}
         >
           <TileLayer url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png" attribution="" />
-          <MapSizeHandler />
+          <MapSizeHandler mapRef={mapRef} userInteractedRef={userInteractedRef} />
           <MapRefSetter mapRef={mapRef} />
+          <FitBounds coords={routeGeometry || []} userInteractedRef={userInteractedRef} />
           {routeData.origin && (
             <Marker position={[routeData.origin.lat, routeData.origin.lng]} icon={userIcon}>
               <Popup>
@@ -250,7 +277,6 @@ export const TourNavigationPage: React.FC<TourNavigationPageProps> = ({ tourId,
               </Popup>
             </Marker>
           )}
-          {routeGeometry && <FitBounds coords={routeGeometry} />}
           {routeGeometry && (
             <Polyline positions={routeGeometry} color="#2563eb" weight={6} opacity={0.9} smoothFactor={1} />
           )}