refactor code & fixed location

src/main.ts

@@ -3,6 +3,7 @@ import App from '@/App.vue'
 import '@/registerServiceWorker'
 import router from '@/router'
 import { createPinia } from 'pinia'
+import piniaPluginPersistedstate from 'pinia-plugin-persistedstate'
 import { Quasar, Dialog, Notify, Loading } from 'quasar'
 import '@vuepic/vue-datepicker/dist/main.css'
 import quasarUserOptions from '@/quasar-user-options'
@@ -14,6 +15,7 @@ import http from '@/plugins/http'
 
 const app = createApp(App)
 const pinia = createPinia()
+pinia.use(piniaPluginPersistedstate)
 
 app.use(router)
 app.use(pinia)