diff --git a/frontend/package.json b/frontend/package.json
index 6afe2b1..767fee9 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -18,6 +18,7 @@
     "@fortawesome/vue-fontawesome": "^3.2.0",
     "bulma": "^1.0.4",
     "pinia": "^3.0.4",
+    "pinia-plugin-persistedstate": "^4.7.1",
     "vue": "^3.5.32",
     "vue-router": "^5.0.4"
   },
diff --git a/frontend/pnpm-lock.yaml b/frontend/pnpm-lock.yaml
index fa9bbc2..4e7f0b6 100644
--- a/frontend/pnpm-lock.yaml
+++ b/frontend/pnpm-lock.yaml
@@ -20,6 +20,9 @@ importers:
       pinia:
         specifier: ^3.0.4
         version: 3.0.4(typescript@6.0.3)(vue@3.5.33(typescript@6.0.3))
+      pinia-plugin-persistedstate:
+        specifier: ^4.7.1
+        version: 4.7.1(pinia@3.0.4(typescript@6.0.3)(vue@3.5.33(typescript@6.0.3)))
       vue:
         specifier: ^3.5.32
         version: 3.5.33(typescript@6.0.3)
@@ -968,6 +971,9 @@ packages:
     resolution: {integrity: sha512-N+MeXYoqr3pOgn8xfyRPREN7gHakLYjhsHhWGT3fWAiL4IkAt0iDw14QiiEm2bE30c5XX5q0FtAA3CK5f9/BUg==}
     engines: {node: '>=12'}
 
+  defu@6.1.7:
+    resolution: {integrity: sha512-7z22QmUWiQ/2d0KkdYmANbRUVABpZ9SNYyH5vx6PZ+nE5bcC0l7uFvEfHlyld/HcGBFTL536ClDt3DEcSlEJAQ==}
+
   detect-libc@2.1.2:
     resolution: {integrity: sha512-Btj2BOOO83o3WyH59e8MgXsxEQVcarkUOpEYrubB0urwnN10yQ364rsiByU11nZlqWYZm05i/of7io4mzihBtQ==}
     engines: {node: '>=8'}
@@ -1431,6 +1437,20 @@ packages:
     engines: {node: '>=0.10'}
     hasBin: true
 
+  pinia-plugin-persistedstate@4.7.1:
+    resolution: {integrity: sha512-WHOqh2esDlR3eAaknPbqXrkkj0D24h8shrDPqysgCFR6ghqP/fpFfJmMPJp0gETHsvrh9YNNg6dQfo2OEtDnIQ==}
+    peerDependencies:
+      '@nuxt/kit': '>=3.0.0'
+      '@pinia/nuxt': '>=0.10.0'
+      pinia: '>=3.0.0'
+    peerDependenciesMeta:
+      '@nuxt/kit':
+        optional: true
+      '@pinia/nuxt':
+        optional: true
+      pinia:
+        optional: true
+
   pinia@3.0.4:
     resolution: {integrity: sha512-l7pqLUFTI/+ESXn6k3nu30ZIzW5E2WZF/LaHJEpoq6ElcLD+wduZoB2kBN19du6K/4FDpPMazY2wJr+IndBtQw==}
     peerDependencies:
@@ -2625,6 +2645,8 @@ snapshots:
 
   define-lazy-prop@3.0.0: {}
 
+  defu@6.1.7: {}
+
   detect-libc@2.1.2: {}
 
   electron-to-chromium@1.5.344: {}
@@ -3036,6 +3058,12 @@ snapshots:
 
   pidtree@0.6.0: {}
 
+  pinia-plugin-persistedstate@4.7.1(pinia@3.0.4(typescript@6.0.3)(vue@3.5.33(typescript@6.0.3))):
+    dependencies:
+      defu: 6.1.7
+    optionalDependencies:
+      pinia: 3.0.4(typescript@6.0.3)(vue@3.5.33(typescript@6.0.3))
+
   pinia@3.0.4(typescript@6.0.3)(vue@3.5.33(typescript@6.0.3)):
     dependencies:
       '@vue/devtools-api': 7.7.9
diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 356f88c..3730023 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -1,7 +1,9 @@
 <script setup lang="ts">
-import { useLanguageStore } from './stores/global';
+import { useLanguageStore } from './stores/i18n';
+import { useTokenStore } from './stores/token';
 
 const language = useLanguageStore();
+const token = useTokenStore();
 
 </script>
 
@@ -23,18 +25,18 @@ const language = useLanguageStore();
       <div id="coleaf-navbar" class="navbar-menu">
         <div class="navbar-start">
           <router-link class="navbar-item" to="/home">Home</router-link>
-          <router-link class="navbar-item" to="/collection">Collection</router-link>
-          <router-link class="navbar-item" to="/calendar">Calendar</router-link>
-          <router-link class="navbar-item" to="/todo">Todo</router-link>
-          <router-link class="navbar-item" to="/admin">Admin</router-link>
+          <router-link v-if="token.isLoggedIn" class="navbar-item" to="/collection">Collection</router-link>
+          <router-link v-if="token.isLoggedIn" class="navbar-item" to="/calendar">Calendar</router-link>
+          <router-link v-if="token.isLoggedIn" class="navbar-item" to="/todo">Todo</router-link>
+          <router-link v-if="token.isLoggedIn" class="navbar-item" to="/admin">Admin</router-link>
         </div>
 
         <div class="navbar-end">
           <p class="navbar-item">
-            <a class="button is-primary" href="/login">Login</a>
+            <router-link v-if="!token.isLoggedIn" class="button is-primary" to="/login">Login</router-link>
           </p>
           <p class="navbar-item">
-            <a class="button is-primary">Logout</a>
+            <a v-if="token.isLoggedIn" class="button is-primary">Logout</a>
           </p>
 
           <div class="navbar-item has-dropdown is-hoverable">
diff --git a/frontend/src/main.ts b/frontend/src/main.ts
index 16055ff..db97d4a 100644
--- a/frontend/src/main.ts
+++ b/frontend/src/main.ts
@@ -1,14 +1,17 @@
 import { createApp } from 'vue'
 import { createPinia } from 'pinia'
+import piniaPluginPersistedstate from 'pinia-plugin-persistedstate'
 
 import App from './App.vue'
 import router from './router'
 
 import '../public/index.scss'
 
-const app = createApp(App)
+const pinia = createPinia();
+pinia.use(piniaPluginPersistedstate);
 
-app.use(createPinia())
-app.use(router)
+const app = createApp(App);
+app.use(pinia);
+app.use(router);
 
-app.mount('#app')
+app.mount('#app');
diff --git a/frontend/src/stores/global.ts b/frontend/src/stores/i18n.ts
similarity index 77%
rename from frontend/src/stores/global.ts
rename to frontend/src/stores/i18n.ts
index e36064d..0feab2c 100644
--- a/frontend/src/stores/global.ts
+++ b/frontend/src/stores/i18n.ts
@@ -1,9 +1,12 @@
-import { ref, computed } from 'vue'
 import { defineStore } from 'pinia'
 import { Language } from '@/utils/i18n'
 
+interface LanguageState {
+  language: Language
+}
+
 export const useLanguageStore = defineStore('language', {
-  state: () => ({
+  state: (): LanguageState => ({
     language: Language.English
   }),
 
@@ -23,4 +26,10 @@ export const useLanguageStore = defineStore('language', {
       this.changeLanguage(Language.SimplifiedChinese);
     },
   },
+
+  persist: {
+    key: 'ccn-i18n',
+    storage: localStorage,
+    pick: ['language'],
+  },
 })
diff --git a/frontend/src/stores/token.ts b/frontend/src/stores/token.ts
new file mode 100644
index 0000000..af4ce2c
--- /dev/null
+++ b/frontend/src/stores/token.ts
@@ -0,0 +1,30 @@
+import { defineStore } from 'pinia'
+
+interface TokenState {
+    token: string | null
+}
+
+export const useTokenStore = defineStore('token', {
+  state: (): TokenState => ({
+    token: null,
+  }),
+
+  getters: {
+    isLoggedIn: (state) => typeof state.token === 'string',
+  },
+
+  actions: {
+    login(token: string) {
+        this.token = token;
+    },
+    logout() {
+        this.token = null;
+    },
+  },
+
+  persist: {
+    key: 'ccn-token',
+    storage: localStorage,
+    pick: ['token'],
+  },
+})