Refactor point value object and add observability

client/src/hooks/useUserLocation.ts

@@ -1,6 +1,6 @@
 import { useCallback, useEffect, useRef, useState } from 'react'
 
-import type { LatLng } from '@/types/api'
+import type { Point } from '@/types/api'
 
 function geolocationErrorMessage(error: GeolocationPositionError): string {
   switch (error.code) {
@@ -16,7 +16,7 @@ function geolocationErrorMessage(error: GeolocationPositionError): string {
 }
 
 export function useUserLocation() {
-  const [location, setLocation] = useState<LatLng | null>(null)
+  const [location, setLocation] = useState<Point | null>(null)
   const [error, setError] = useState<string | null>(null)
   const [isRequesting, setIsRequesting] = useState<boolean>(false)
   const watchIdRef = useRef<number | null>(null)