fix: wrap MapViewUpdater operations in try/catch to prevent unmount errors

Author: taditharun

frontend/src/components/ChapterMap.tsx

@@ -74,6 +74,7 @@ const MapViewUpdater = ({
 
   useEffect(() => {
     if (!map) return
+    try{
     const container = map.getContainer()
     if (!container) return
     const width = container.clientWidth
@@ -122,10 +123,14 @@ const MapViewUpdater = ({
       map.fitBounds(localBounds, { maxZoom: maxZoom, padding: [padding, padding] })
     } else {
       map.setView([20, 0], Math.max(dynamicMinZoom, 2))
-    }
-  }, [userLocation, showLocal, validGeoLocData, map])
+    } 
+  } catch {
+          // the map container was removed before update complite
 
-  return null
+  }
+   [userLocation, showLocal, validGeoLocData, map])
+
+   return null
 }
 
 const ChapterMap = ({