add util.ts for sharing common functions between frontend and backend

src/components/CountUp.vue

@@ -3,9 +3,9 @@
     <span v-else>{{ value }}</span>
 </template>
 
-<script>
+<script lang="ts">
 
-import { sleep } from "../util-frontend"
+import { sleep } from "../util.ts"
 
 export default {
 

src/components/NotificationDialog.vue

@@ -345,9 +345,9 @@
     </Confirm>
 </template>
 
-<script>
+<script lang="ts">
 import { Modal } from "bootstrap"
-import { ucfirst } from "../util-frontend"
+import { ucfirst } from "../util.ts"
 import axios from "axios";
 import { useToast } from "vue-toastification"
 import Confirm from "./Confirm.vue";