diff --git a/package.json b/package.json
index 6a2dd93..3fd7979 100644
--- a/package.json
+++ b/package.json
@@ -32,10 +32,12 @@
     "@commitlint/cli": "^17.4.3",
     "@commitlint/config-conventional": "^17.4.3",
     "@iconify/vue": "^4.1.0",
+    "@types/crypto-js": "^4.1.1",
     "@types/node": "^18.13.0",
     "@vitejs/plugin-vue": "^4.0.0",
     "autoprefixer": "^10.4.13",
     "axios": "^1.3.2",
+    "crypto-js": "^4.1.1",
     "eslint": "^8.34.0",
     "husky": "^8.0.3",
     "lint-staged": "^13.1.1",
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index b0b2e76..5bd96a7 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -5,10 +5,12 @@ specifiers:
   '@commitlint/cli': ^17.4.3
   '@commitlint/config-conventional': ^17.4.3
   '@iconify/vue': ^4.1.0
+  '@types/crypto-js': ^4.1.1
   '@types/node': ^18.13.0
   '@vitejs/plugin-vue': ^4.0.0
   autoprefixer: ^10.4.13
   axios: ^1.3.2
+  crypto-js: ^4.1.1
   eslint: ^8.34.0
   husky: ^8.0.3
   lint-staged: ^13.1.1
@@ -35,10 +37,12 @@ devDependencies:
   '@commitlint/cli': 17.4.3
   '@commitlint/config-conventional': 17.4.3
   '@iconify/vue': 4.1.0_vue@3.2.47
+  '@types/crypto-js': 4.1.1
   '@types/node': 18.13.0
   '@vitejs/plugin-vue': 4.0.0_vite@4.1.1+vue@3.2.47
   autoprefixer: 10.4.13_postcss@8.4.21
   axios: 1.3.2
+  crypto-js: 4.1.1
   eslint: 8.34.0
   husky: 8.0.3
   lint-staged: 13.1.1
@@ -697,6 +701,10 @@ packages:
     resolution: {integrity: sha512-yOlFc+7UtL/89t2ZhjPvvB/DeAr3r+Dq58IgzsFkOAvVC6NMJXmCGjbptdXdR9qsX7pKcTL+s87FtYREi2dEEQ==}
     dev: true
 
+  /@types/crypto-js/4.1.1:
+    resolution: {integrity: sha512-BG7fQKZ689HIoc5h+6D2Dgq1fABRa0RbBWKBd9SP/MVRVXROflpm5fhwyATX5duFmbStzyzyycPB8qUYKDH3NA==}
+    dev: true
+
   /@types/json-schema/7.0.11:
     resolution: {integrity: sha512-wOuvG1SN4Us4rez+tylwwwCV1psiNVOkJeM3AUWUNWg/jDQY2+HE/444y5gc+jBmRqASOm2Oeh5c1axHobwRKQ==}
     dev: true
@@ -1529,6 +1537,10 @@ packages:
       which: 2.0.2
     dev: true
 
+  /crypto-js/4.1.1:
+    resolution: {integrity: sha512-o2JlM7ydqd3Qk9CA0L4NL6mTzU2sdx96a+oOfPu8Mkl/PK51vSyoi8/rQ8NknZtk44vq15lmhAj9CIAGwgeWKw==}
+    dev: true
+
   /css-render/0.15.12:
     resolution: {integrity: sha512-eWzS66patiGkTTik+ipO9qNGZ+uNuGyTmnz6/+EJIiFg8+3yZRpnMwgFo8YdXhQRsiePzehnusrxVvugNjXzbw==}
     dependencies:
diff --git a/src/components/business/Chat/layout/sider/Footer.vue b/src/components/business/Chat/layout/sider/Footer.vue
index a485c3a..cc72d0d 100644
--- a/src/components/business/Chat/layout/sider/Footer.vue
+++ b/src/components/business/Chat/layout/sider/Footer.vue
@@ -3,9 +3,8 @@ import { HoverButton, SvgIcon, UserAvatar } from '@/components/common'
 </script>
 
 <template>
-  <footer class="flex items-center justify-between p-4 overflow-hidden border-t">
-    <UserAvatar />
-
+  <footer class="flex items-center justify-between min-w-0 p-4 overflow-hidden border-t h-[70px]">
+    <UserAvatar class="flex-1" />
     <HoverButton tooltip="Setting">
       <span class="text-xl text-[#4f555e]">
         <SvgIcon icon="ri:settings-4-line" />
diff --git a/src/components/business/Chat/layout/sider/index.vue b/src/components/business/Chat/layout/sider/index.vue
index f00cea6..8ecd9ce 100644
--- a/src/components/business/Chat/layout/sider/index.vue
+++ b/src/components/business/Chat/layout/sider/index.vue
@@ -1,34 +1,14 @@
 <script setup lang='ts'>
-import { ref, watch } from 'vue'
+import { ref } from 'vue'
 import { NButton, NLayoutSider, useMessage } from 'naive-ui'
 import List from './List.vue'
 import Footer from './Footer.vue'
+import { useAppStore } from '@/store'
 
-interface Props {
-  collapsed?: boolean
-}
-
-interface Emit {
-  (e: 'update:collapsed', value: boolean): void
-}
-
-const props = withDefaults(defineProps<Props>(), {
-  collapsed: false,
-})
-
-const emit = defineEmits<Emit>()
-
+const appStore = useAppStore()
 const ms = useMessage()
 
-const collapsed = ref(props.collapsed)
-
-watch(
-  () => props.collapsed,
-  (value: boolean) => {
-    collapsed.value = value
-  },
-  { immediate: true },
-)
+const collapsed = ref(appStore.siderCollapsed ?? false)
 
 function handleAdd() {
   ms.info('Coming soon...')
@@ -36,7 +16,7 @@ function handleAdd() {
 
 function handleCollapsed() {
   collapsed.value = !collapsed.value
-  emit('update:collapsed', collapsed.value)
+  appStore.setSiderCollapsed(collapsed.value)
 }
 </script>
 
diff --git a/src/store/modules/app/helper.ts b/src/store/modules/app/helper.ts
new file mode 100644
index 0000000..55f9b22
--- /dev/null
+++ b/src/store/modules/app/helper.ts
@@ -0,0 +1,18 @@
+import { ls } from '@/utils/storage'
+
+export interface AppState {
+  siderCollapsed: boolean
+}
+
+export function defaultSetting() {
+  return { siderCollapsed: false }
+}
+
+export function getAppSetting() {
+  const localSetting: AppState = ls.get('appSetting')
+  return localSetting ?? defaultSetting()
+}
+
+export function setAppSetting(setting: AppState) {
+  ls.set('appSetting', setting)
+}
diff --git a/src/store/modules/app/index.ts b/src/store/modules/app/index.ts
index ca89ec5..8935e67 100644
--- a/src/store/modules/app/index.ts
+++ b/src/store/modules/app/index.ts
@@ -1,19 +1,16 @@
 import { defineStore } from 'pinia'
-
-interface AppState {
-  siderCollapsed: boolean
-}
+import type { AppState } from './helper'
+import { getAppSetting, setAppSetting } from './helper'
 
 export const useAppStore = defineStore('app-store', {
-  state: (): AppState => ({
-    siderCollapsed: false,
-  }),
+  state: (): AppState => getAppSetting(),
   actions: {
     setSiderCollapsed(collapsed: boolean) {
       this.siderCollapsed = collapsed
+      setAppSetting(this.$state)
     },
     toggleSiderCollapse() {
-      this.siderCollapsed = !this.siderCollapsed
+      this.setSiderCollapsed(!this.siderCollapsed)
     },
   },
 })
diff --git a/src/utils/crypto/index.ts b/src/utils/crypto/index.ts
new file mode 100644
index 0000000..6c57c8d
--- /dev/null
+++ b/src/utils/crypto/index.ts
@@ -0,0 +1,18 @@
+import CryptoJS from 'crypto-js'
+
+const CryptoSecret = '__CRYPTO_SECRET__'
+
+export function enCrypto(data: any) {
+  const str = JSON.stringify(data)
+  return CryptoJS.AES.encrypt(str, CryptoSecret).toString()
+}
+
+export function deCrypto(data: string) {
+  const bytes = CryptoJS.AES.decrypt(data, CryptoSecret)
+  const str = bytes.toString(CryptoJS.enc.Utf8)
+
+  if (str)
+    return JSON.parse(str)
+
+  return null
+}
diff --git a/src/utils/is/index.ts b/src/utils/is/index.ts
new file mode 100644
index 0000000..fd05cd3
--- /dev/null
+++ b/src/utils/is/index.ts
@@ -0,0 +1,55 @@
+export function isNumber<T extends number>(value: T | unknown): value is number {
+  return Object.prototype.toString.call(value) === '[object Number]'
+}
+
+export function isString<T extends string>(value: T | unknown): value is string {
+  return Object.prototype.toString.call(value) === '[object String]'
+}
+
+export function isBoolean<T extends boolean>(value: T | unknown): value is boolean {
+  return Object.prototype.toString.call(value) === '[object Boolean]'
+}
+
+export function isNull<T extends null>(value: T | unknown): value is null {
+  return Object.prototype.toString.call(value) === '[object Null]'
+}
+
+export function isUndefine<T extends undefined>(value: T | unknown): value is undefined {
+  return Object.prototype.toString.call(value) === '[object Undefined]'
+}
+
+export function isObject<T extends object>(value: T | unknown): value is object {
+  return Object.prototype.toString.call(value) === '[object Object]'
+}
+
+export function isArray<T extends any[]>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object Array]'
+}
+
+export function isFunction<T extends (...args: any[]) => any | void | never>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object Function]'
+}
+
+export function isDate<T extends Date>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object Date]'
+}
+
+export function isRegExp<T extends RegExp>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object RegExp]'
+}
+
+export function isPromise<T extends Promise<any>>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object Promise]'
+}
+
+export function isSet<T extends Set<any>>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object Set]'
+}
+
+export function isMap<T extends Map<any, any>>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object Map]'
+}
+
+export function isFile<T extends File>(value: T | unknown): value is T {
+  return Object.prototype.toString.call(value) === '[object File]'
+}
diff --git a/src/utils/storage/index.ts b/src/utils/storage/index.ts
new file mode 100644
index 0000000..87c2c0a
--- /dev/null
+++ b/src/utils/storage/index.ts
@@ -0,0 +1 @@
+export * from './local'
diff --git a/src/utils/storage/local.ts b/src/utils/storage/local.ts
new file mode 100644
index 0000000..fabfd23
--- /dev/null
+++ b/src/utils/storage/local.ts
@@ -0,0 +1,59 @@
+import { deCrypto, enCrypto } from '../crypto'
+
+interface StorageData<T = any> {
+  value: T
+  expire: number | null
+}
+
+function createLocalStorage() {
+  const DEFAULT_CACHE_TIME = 60 * 60 * 24 * 7 // 7 days
+
+  function set<T = any>(key: string, value: T, expire: number | null = DEFAULT_CACHE_TIME) {
+    const storageData: StorageData<T> = {
+      value,
+      expire: expire !== null ? new Date().getTime() + expire * 1000 : null,
+    }
+    const json = enCrypto(storageData)
+    window.localStorage.setItem(key, json)
+  }
+
+  function get(key: string) {
+    const json = window.localStorage.getItem(key)
+    if (json) {
+      let storageData: StorageData | null = null
+
+      try {
+        storageData = deCrypto(json)
+      }
+      catch {
+        // Prevent failure
+      }
+
+      if (storageData) {
+        const { value, expire } = storageData
+        if (expire === null || expire >= Date.now())
+          return value
+      }
+
+      remove(key)
+      return null
+    }
+  }
+
+  function remove(key: string) {
+    window.localStorage.removeItem(key)
+  }
+
+  function clear() {
+    window.localStorage.clear()
+  }
+
+  return {
+    set,
+    get,
+    remove,
+    clear,
+  }
+}
+
+export const ls = createLocalStorage()