refactor: remove deprecated reactivity transform (#487)

src/pages/index.vue

@@ -3,11 +3,11 @@ defineOptions({
   name: 'IndexPage',
 })
 const user = useUserStore()
-const name = $ref(user.savedName)
+const name = ref(user.savedName)
 
 const router = useRouter()
 function go() {
-  if (name)
+  if (name.value)
     router.push(`/hi/${encodeURIComponent(name)}`)
 }