fix(feat-SW-94): use function declarations

hooks/useHash.tsx

@@ -3,10 +3,11 @@
 import { useParams } from "next/navigation"
 import { useEffect, useState } from "react"
 
-const getHash = () =>
-  typeof window !== "undefined" ? window.location.hash : undefined
+function getHash() {
+  return typeof window !== "undefined" ? window.location.hash : undefined
+}
 
-const useHash = () => {
+function useHash() {
   const [isClient, setIsClient] = useState(false)
   const [hash, setHash] = useState(getHash())
   const params = useParams()