web: implement localstorage

web/src/store.ts

@@ -1,8 +1,15 @@
 import { reactive } from 'vue';
 
 export const store = reactive<{token: string | null, setToken: (token: string | null) => void}>({
-  token: null,
-  setToken: (token: string | null) => store.token = token
+  token: localStorage.getItem('token') || null,
+  setToken: (token: string | null) => {
+    store.token = token
+    if (token) {
+      localStorage.setItem('token', token)
+    } else{
+      localStorage.removeItem('token')
+    }
+  }
 });