【需求 20331】 feat: 在线时间持久化存储

src/stores/onlineTime.ts

 import { defineStore } from 'pinia'
+import { useLocalStorage } from '@vueuse/core'
 
 export const useOnlineTimeStore = defineStore('onlineTime', () => {
-  const showOnlineTime = ref(true)
+  const showOnlineTime = useLocalStorage('show-online-time', true)
   return {
     showOnlineTime,
   }