diff --git a/.gitignore b/.gitignore
index 691eb5d..b007628 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,5 +34,9 @@ client/unpackage/
 *.pem
 *.key
 
+# Uploads (user-generated content)
+server/uploads/
+
 # Playwright
 .playwright-mcp/
+server/backups/
diff --git a/CLAUDE.md b/CLAUDE.md
index a517304..86eb176 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -16,6 +16,8 @@
 - **运行时**: Node.js + Express
 - **数据库**: MySQL 8.0 (mysql2 连接池)
 - **认证**: HMAC-SHA256 签名 token，30 天过期
+- **文件上传**: multer (头像，最大 2MB)
+- **备份**: Node.js mysql2 导出 (不依赖 mysqldump)
 - **CORS**: 已配置，支持 credentials
 
 ## Design System
@@ -37,10 +39,17 @@
 
 ### 关键原则
 - 最小触摸目标 44×44px
-- 禁止使用 emoji 作为图标，统一使用 SvgIcon 组件
+- 禁止使用 emoji 作为图标，统一使用 Icon 组件
 - 尊重 prefers-reduced-motion
 - 文字对比度 ≥ 4.5:1 (WCAG AA)
 
+### 小程序胶囊适配
+- 微信小程序右上角有胶囊按钮，页面顶部右侧元素（图标、按钮）需避开
+- 使用 `system.ts` 导出的 `capsuleRight` 计算安全距离
+- 导航栏添加动态 padding: `:style="{ paddingRight: capsuleRight + 'px' }"`
+- 居中标题页面（统计、账单、我的）不需要处理
+- 有右侧元素的页面（首页 bell、编辑页保存按钮）必须处理
+
 ## Project Conventions
 
 ### 命名
@@ -58,41 +67,69 @@ client/src/
 │   ├── add/            # 添加/编辑记录
 │   ├── stats/          # 统计分析
 │   ├── bills/          # 全部账单 (下拉刷新/上拉加载)
-│   ├── profile/        # 个人设置
-│   └── category-manage/ # 分类管理
+│   ├── profile/        # 我的（身份切换入口）
+│   ├── profile-edit/   # 编辑资料（昵称+头像）
+│   ├── group-manage/   # 群组管理（创建/加入/退出/解散）
+│   ├── category-manage/ # 分类管理
+│   └── budget/         # 预算设置
 ├── components/         # 公共组件
 │   ├── BudgetBar/      # 预算进度条
 │   ├── CategoryIcon/   # 分类图标 (首字+颜色)
+│   ├── Icon/           # 图标组件 (PNG 映射)
 │   ├── Numpad/         # 数字键盘
-│   ├── SvgIcon/        # SVG 图标 (base64 data URI)
+│   ├── Skeleton/       # 骨架屏
 │   └── TransactionItem/ # 交易列表项
 ├── stores/             # Pinia stores
-│   ├── transaction.ts  # 交易 CRUD
+│   ├── transaction.ts  # 交易 CRUD (自动传递 group_id)
 │   ├── category.ts     # 分类 CRUD
 │   ├── budget.ts       # 预算管理
-│   └── stats.ts        # 统计概览
+│   ├── stats.ts        # 统计概览 (自动传递 group_id)
+│   ├── user.ts         # 用户信息 (昵称/头像)
+│   └── group.ts        # 群组管理 (身份切换)
+├── api/                # API 封装
+│   ├── auth.ts         # 登录接口
+│   ├── transaction.ts  # 交易接口
+│   ├── stats.ts        # 统计接口
+│   ├── user.ts         # 用户信息接口 (含头像上传)
+│   └── group.ts        # 群组接口
 ├── utils/
 │   ├── format.ts       # 金额/日期格式化
-│   ├── request.ts      # HTTP 请求封装 (401 处理/自动重登录)
-│   └── system.ts       # 系统信息 (状态栏高度等)
+│   ├── request.ts      # HTTP 请求封装 (401 自动重登录+队列重试)
+│   ├── system.ts       # 系统信息 (statusBarHeight, capsuleRight)
+│   └── app-ready.ts    # App 启动就绪机制 (waitForReady)
+├── config.ts           # 全局配置 (API_BASE)
 └── static/icons/       # tabBar 图标 (PNG)
 
 server/src/
-├── index.ts            # Express 入口 (CORS, JSON 解析)
-├── middleware/auth.ts   # HMAC token 验证中间件
+├── index.ts            # Express 入口 (CORS, JSON, 静态文件, 路由注册)
+├── middleware/auth.ts   # HMAC token 验证 (timingSafeEqual)
 ├── routes/
-│   ├── auth.ts         # 登录 / token 签发
-│   ├── transaction.ts  # 交易 CRUD (用户隔离)
+│   ├── auth.ts         # 登录 / token 签发 (返回用户信息)
+│   ├── transaction.ts  # 交易 CRUD (支持 group_id 视图切换)
 │   ├── category.ts     # 分类 CRUD (默认+自定义)
 │   ├── budget.ts       # 预算 CRUD (按月)
-│   └── stats.ts        # 统计查询
+│   ├── stats.ts        # 统计查询 (支持 group_id)
+│   ├── user.ts         # 用户信息 + 头像上传
+│   ├── group.ts        # 群组 CRUD (创建/加入/退出/解散)
+│   └── backup.ts       # 备份 API
+├── utils/
+│   ├── backup.ts       # Node.js 数据库备份 (gzip)
+│   └── date.ts         # 日期工具
 └── db/
     ├── connection.ts   # MySQL 连接池
-    ├── init.ts         # 建表 + seed (multipleStatements)
+    ├── init.ts         # 建表 + seed + 迁移 (幂等)
     ├── schema.sql      # 表结构
     └── seed.sql        # 默认分类数据
 ```
 
+### 数据库表
+- `users` — 用户 (openid, nickname, avatar_url)
+- `categories` — 分类 (user_id=0 默认, 其他=自定义)
+- `transactions` — 交易记录 (user_id, group_id, amount 分)
+- `budgets` — 预算 (user_id, month, amount)
+- `groups` — 群组 (name, invite_code, created_by)
+- `group_members` — 群组成员 (group_id, user_id, role)
+
 ### 金额处理
 - 存储单位: 分 (整数，避免浮点精度问题)
 - 显示单位: 元 (保留两位小数)
@@ -101,15 +138,28 @@ server/src/
 - 使用 `formatAmount()` 带 ¥ 前缀，`formatAmountRaw()` 纯数字
 
 ### 数据持久化
-- 前端本地存储 Key: `xc:token`, `xc:userId`
+- 前端本地存储 Key:
+  - `xc:token` — 认证 token
+  - `xc:userId` — 用户 ID
+  - `xc:nickname` — 用户昵称
+  - `xc:avatar_url` — 头像文件名
+  - `xc:currentGroupId` — 当前选中群组 ID (null=个人模式)
 - 后端 MySQL 数据库
-- API 基础地址: `request.ts` 中的 `BASE_URL`
+- API 基础地址: `config.ts` 中的 `API_BASE`
 
 ### 认证流程
-- H5: 页面加载时自动 login 获取 token
+- H5: 页面加载时自动 demo-login 获取 token
 - 微信小程序: `App.vue` onLaunch 调用 `wx.login` 获取 code，换 token
 - Token: HMAC-SHA256 签名，30 天过期
-- 401 处理: 自动清除 token，小程序触发 reLogin，H5 刷新页面
+- 401 处理: 请求入队 → 自动重登录 → 队列中所有请求重试
+- 启动就绪: `app-ready.ts` 的 `waitForReady()` 确保页面在登录完成后才加载数据
+
+### 一起记 (群组)
+- 群组仅做数据聚合，记录始终属于记录者 (user_id)
+- 个人视图: `WHERE user_id = 我` (所有记录)
+- 群组视图: `WHERE group_id = X AND user_id IN (当前成员)`
+- 退出群组: 该用户的 group_id 设为 NULL，记录回到个人视图
+- 身份切换: 「我的」页底部弹窗选择，全局生效
 
 ### Git
 - 分支: `master` → `main` (注意远程)
@@ -141,9 +191,10 @@ cd server && npm run db:init
 
 ## 部署
 
-- 服务器: `106.14.208.43:3000`
+- 开发服务: `dev.xiaocai.j35.site:3000`
+- 正式服务: `xiaocai.j35.site`
 - MySQL: 本地 3306 端口
-- 微信小程序上线需配置 HTTPS 域名 (替换 `request.ts` 中的 `BASE_URL`)
+- 小程序开发版自动连接 dev 服务，正式版/H5 连接线上 (config.ts)
 
 ### 手动部署步骤
 
@@ -163,7 +214,7 @@ cd /var/www/xiaocai && npm install --production
 # 5. 重启服务
 pm2 restart xiaocai-server
 # 或直接运行
-node dist/index.js
+NODE_ENV=production node dist/index.js
 ```
 
 ## 开发
diff --git a/DEV.md b/DEV.md
index d9e0808..392ef01 100644
--- a/DEV.md
+++ b/DEV.md
@@ -26,10 +26,17 @@
 - 不要为了注释而注释，避免冗余的废话（例如 `i++; // 自增 i`）。
 - 多行 JSDoc/文档注释保持可读性，**不要压缩成单行**。
 
+## 小程序适配要点
+
+- 页面顶部右侧有元素时，使用 `capsuleRight` 避开胶囊按钮
+- 新页面需要加载数据时，在 `onMounted` 中先 `await waitForReady()` 再请求
+- API 地址统一在 `config.ts` 中配置，不要在各文件中硬编码
+- 头像等用户文件 URL 只存文件名，前端拼接 `API_BASE + 路径 + 文件名`
+
 ## Never 规则
 
 - Never 修改 dist/ 目录
-- Never 使用内联样式，除非需要动态计算
+- Never 使用内联样式，除非需要动态计算（胶囊 padding 等除外）
 - Never 在渲染路径中执行耗时操作
 - Never 在列表渲染中省略 key 属性
 - Never 修改 lock 文件
@@ -39,4 +46,5 @@
 
 ## Requirements
 
-- 代码提交前检查代码，包括但不限于代码格式、注释、测试覆盖率等。
+- 代码提交前必须检查代码，包括但不限于代码格式、注释、测试覆盖率、文档更新等。
+- 影响到历史数据吧，必须要准备好数据迁移方案。
diff --git a/client/src/App.vue b/client/src/App.vue
index 60fb3b0..0e94386 100644
--- a/client/src/App.vue
+++ b/client/src/App.vue
@@ -1,22 +1,28 @@
 <script setup lang="ts">
 import { onLaunch } from '@dcloudio/uni-app'
 import { wxLogin, demoLogin } from '@/api/auth'
+import { useGroupStore } from '@/stores/group'
+import { saveLoginResult } from '@/utils/request'
+import { markReady } from '@/utils/app-ready'
 
 onLaunch(() => {
+  const groupStore = useGroupStore()
+  groupStore.init()
+
   // #ifdef MP-WEIXIN
   uni.login({
     provider: 'weixin',
     success: async (loginRes) => {
       if (loginRes.code) {
         try {
-          const data = await wxLogin(loginRes.code)
-          uni.setStorageSync('xc:token', data.token)
-          uni.setStorageSync('xc:userId', data.userId)
+          saveLoginResult(await wxLogin(loginRes.code))
+          groupStore.fetchGroups()
           console.log('[Auth] Login success')
         } catch (e) {
           console.error('[Auth] Login failed:', e)
         }
       }
+      markReady()
     }
   })
   // #endif
@@ -24,15 +30,16 @@ onLaunch(() => {
   // #ifdef H5
   const token = uni.getStorageSync('xc:token')
   if (!token) {
-    // 同步等待 token，避免页面首次请求因无 token 而 401
     demoLogin().then((data) => {
-      uni.setStorageSync('xc:token', data.token)
-      uni.setStorageSync('xc:userId', data.userId)
+      saveLoginResult(data)
+      groupStore.fetchGroups()
       console.log('[Auth] H5 demo login success')
     }).catch((e) => {
       console.error('[Auth] H5 demo login failed:', e)
-    })
+    }).finally(() => { markReady() })
   } else {
+    groupStore.fetchGroups()
+    markReady()
     console.log('[Auth] H5 token exists')
   }
   // #endif
diff --git a/client/src/api/auth.ts b/client/src/api/auth.ts
index 1525772..fa6adc3 100644
--- a/client/src/api/auth.ts
+++ b/client/src/api/auth.ts
@@ -4,6 +4,8 @@ import { request } from '@/utils/request'
 export interface LoginResult {
   token: string
   userId: number
+  nickname: string
+  avatar_url: string
 }
 
 /** H5 演示登录 */
diff --git a/client/src/api/budget.ts b/client/src/api/budget.ts
index 0301e28..915b32f 100644
--- a/client/src/api/budget.ts
+++ b/client/src/api/budget.ts
@@ -8,8 +8,8 @@ export interface Budget {
 }
 
 /** 获取预算 */
-export function getBudget(month?: string) {
-  return request<Budget | null>({ url: '/budget', data: month ? { month } : {} })
+export function getBudget(month?: string, group_id?: number | null) {
+  return request<Budget | null>({ url: '/budget', data: { month, group_id } })
 }
 
 /** 设置预算 */
diff --git a/client/src/api/group.ts b/client/src/api/group.ts
new file mode 100644
index 0000000..48212fd
--- /dev/null
+++ b/client/src/api/group.ts
@@ -0,0 +1,58 @@
+import { request } from '@/utils/request'
+
+/** 群组信息 */
+export interface Group {
+  id: number
+  name: string
+  invite_code: string
+  created_by: number
+  created_at: string
+  role: 'owner' | 'member'
+  my_nickname: string
+  member_count: number
+}
+
+/** 群组详情（含成员） */
+export interface GroupDetail extends Group {
+  members: GroupMember[]
+}
+
+/** 群组成员 */
+export interface GroupMember {
+  user_id: number
+  role: 'owner' | 'member'
+  nickname: string
+  user_nickname: string
+  avatar_url: string
+  joined_at: string
+}
+
+/** 创建群组 */
+export function createGroup(data: { name: string }) {
+  return request<{ id: number; invite_code: string }>({ url: '/groups', method: 'POST', data })
+}
+
+/** 获取群组列表 */
+export function getGroups() {
+  return request<Group[]>({ url: '/groups' })
+}
+
+/** 获取群组详情 */
+export function getGroupDetail(id: number) {
+  return request<GroupDetail>({ url: `/groups/${id}` })
+}
+
+/** 加入群组 */
+export function joinGroup(invite_code: string) {
+  return request<{ group_id: number; name: string }>({ url: '/groups/join', method: 'POST', data: { invite_code } })
+}
+
+/** 退出群组 */
+export function leaveGroup(id: number) {
+  return request({ url: `/groups/${id}/leave`, method: 'POST' })
+}
+
+/** 解散群组 */
+export function deleteGroup(id: number) {
+  return request({ url: `/groups/${id}`, method: 'DELETE' })
+}
diff --git a/client/src/api/stats.ts b/client/src/api/stats.ts
index ec3f7e4..482eb7f 100644
--- a/client/src/api/stats.ts
+++ b/client/src/api/stats.ts
@@ -25,16 +25,16 @@ export interface TrendPoint {
 }
 
 /** 获取概览数据 */
-export function getOverview(params?: { month?: string; startDate?: string; endDate?: string }) {
+export function getOverview(params?: { month?: string; startDate?: string; endDate?: string; group_id?: number | null }) {
   return request<Overview>({ url: '/stats/overview', data: params })
 }
 
 /** 获取分类统计 */
-export function getCategoryStats(month?: string, type: string = 'expense') {
-  return request<CategoryStat[]>({ url: '/stats/category', data: { month, type } })
+export function getCategoryStats(month?: string, type: string = 'expense', group_id?: number | null) {
+  return request<CategoryStat[]>({ url: '/stats/category', data: { month, type, group_id } })
 }
 
 /** 获取趋势数据 */
-export function getTrend(month?: string, type: string = 'expense') {
-  return request<TrendPoint[]>({ url: '/stats/trend', data: { month, type } })
+export function getTrend(month?: string, type: string = 'expense', group_id?: number | null) {
+  return request<TrendPoint[]>({ url: '/stats/trend', data: { month, type, group_id } })
 }
diff --git a/client/src/api/transaction.ts b/client/src/api/transaction.ts
index 1d9511f..5f0e5e4 100644
--- a/client/src/api/transaction.ts
+++ b/client/src/api/transaction.ts
@@ -11,6 +11,8 @@ export interface Transaction {
   category_name?: string
   category_icon?: string
   category_color?: string
+  group_id?: number | null
+  creator_nickname?: string
 }
 
 /** 交易列表响应 */
@@ -29,6 +31,7 @@ export interface TransactionParams {
   startDate?: string
   endDate?: string
   sortBy?: string
+  group_id?: number | null
 }
 
 /** 获取交易列表 */
@@ -48,6 +51,7 @@ export function createTransaction(data: {
   category_id?: number
   note?: string
   date: string
+  group_id?: number | null
 }) {
   return request<{ id: number }>({ url: '/transactions', method: 'POST', data })
 }
diff --git a/client/src/api/user.ts b/client/src/api/user.ts
new file mode 100644
index 0000000..1501c58
--- /dev/null
+++ b/client/src/api/user.ts
@@ -0,0 +1,46 @@
+import { request } from '@/utils/request'
+import { API_BASE } from '@/config'
+
+/** 用户信息 */
+export interface UserInfo {
+  id: number
+  nickname: string
+  avatar_url: string
+  created_at: string
+}
+
+/** 获取当前用户信息 */
+export function getUserInfo() {
+  return request<UserInfo>({ url: '/user/me' })
+}
+
+/** 更新昵称 */
+export function updateNickname(nickname: string) {
+  return request({ url: '/user/me', method: 'PUT', data: { nickname } })
+}
+
+/** 上传头像（返回新 URL） */
+export function uploadAvatar(filePath: string): Promise<{ avatar_url: string }> {
+  return new Promise((resolve, reject) => {
+    const token = uni.getStorageSync('xc:token')
+    uni.uploadFile({
+      url: `${API_BASE}/user/avatar`,
+      filePath,
+      name: 'file',
+      header: { Authorization: `Bearer ${token}` },
+      success: (res) => {
+        try {
+          const data = JSON.parse(res.data)
+          if (data.code === 0) {
+            resolve(data.data)
+          } else {
+            reject(new Error(data.message || '上传失败'))
+          }
+        } catch {
+          reject(new Error('上传响应解析失败'))
+        }
+      },
+      fail: () => reject(new Error('网络错误'))
+    })
+  })
+}
diff --git a/client/src/components/Numpad/Numpad.vue b/client/src/components/Numpad/Numpad.vue
index f0b4515..937cac6 100644
--- a/client/src/components/Numpad/Numpad.vue
+++ b/client/src/components/Numpad/Numpad.vue
@@ -4,7 +4,10 @@
       <text class="key-text">{{ key }}</text>
     </view>
     <view class="key fn" @tap="onDelete">
-      <Icon name="trash" :size="36" color="#FF8C69" />
+      <view class="backspace-icon">
+        <view class="backspace-arrow"></view>
+        <view class="backspace-line"></view>
+      </view>
     </view>
     <view class="key eq" @tap="onConfirm">
       <Icon name="check" :size="36" color="#FFFFFF" />
@@ -13,26 +16,71 @@
 </template>
 
 <script setup lang="ts">
+import { computed } from 'vue'
 import Icon from '@/components/Icon/Icon.vue'
 
+const props = withDefaults(defineProps<{
+  /** 金额字符串（v-model） */
+  modelValue?: string
+  /** 最大金额（元） */
+  max?: number
+}>(), {
+  modelValue: '',
+  max: 9999999.99
+})
+
+const emit = defineEmits<{
+  (e: 'update:modelValue', value: string): void
+  (e: 'confirm'): void
+}>()
+
 const keys = ['1', '2', '3', '4', '5', '6', '7', '8', '9', '.', '0', '00']
 
-const emit = defineEmits(['input', 'delete', 'confirm'])
+const amountStr = computed(() => props.modelValue)
 
 function vibrate() {
-  try {
-    uni.vibrateShort({ type: 'light' })
-  } catch {}
+  try { uni.vibrateShort({ type: 'light' }) } catch {}
+}
+
+function emitValue(val: string) {
+  emit('update:modelValue', val)
 }
 
 function onKeyTap(key: string) {
   vibrate()
-  emit('input', key)
+  const current = amountStr.value
+
+  if (key === '.') {
+    if (current.includes('.')) return
+    if (!current) { emitValue('0.'); return }
+  }
+
+  let next: string
+  if (!current || current === '0') {
+    next = (key === '0' || key === '00') ? '0' : key
+  } else {
+    next = current + key
+  }
+
+  if (next.includes('.')) {
+    const decimals = next.split('.')[1]
+    if (decimals && decimals.length > 2) return
+  }
+  if (next.length > 10) return
+  const num = parseFloat(next)
+  if (!isNaN(num) && num > props.max) return
+
+  emitValue(next)
 }
 
 function onDelete() {
   vibrate()
-  emit('delete')
+  const current = amountStr.value
+  if (current.length > 1) {
+    emitValue(current.slice(0, -1))
+  } else {
+    emitValue('')
+  }
 }
 
 function onConfirm() {
@@ -57,9 +105,7 @@ function onConfirm() {
   align-items: center;
   justify-content: center;
 
-  &:active {
-    background: #F0E0D6;
-  }
+  &:active { background: #F0E0D6; }
 }
 
 .key-text {
@@ -71,18 +117,41 @@ function onConfirm() {
 
 .key.fn {
   background: #FFE8E0;
-
-  &:active {
-    background: #FFD0C0;
-  }
+  &:active { background: #FFD0C0; }
 }
 
 .key.eq {
   background: linear-gradient(135deg, #FF8C69, #E67355);
   box-shadow: 0 4rpx 16rpx rgba(255, 140, 105, 0.3);
+  &:active { background: #E67355; }
+}
 
-  &:active {
-    background: #E67355;
-  }
+// 自绘 backspace 图标
+.backspace-icon {
+  width: 40rpx;
+  height: 28rpx;
+  position: relative;
+}
+
+.backspace-arrow {
+  position: absolute;
+  left: 0;
+  top: 50%;
+  width: 16rpx;
+  height: 16rpx;
+  border-left: 4rpx solid #FF8C69;
+  border-bottom: 4rpx solid #FF8C69;
+  transform: translateY(-50%) rotate(45deg);
+}
+
+.backspace-line {
+  position: absolute;
+  left: 12rpx;
+  top: 50%;
+  width: 26rpx;
+  height: 4rpx;
+  background: #FF8C69;
+  transform: translateY(-50%);
+  border-radius: 2rpx;
 }
 </style>
diff --git a/client/src/config.ts b/client/src/config.ts
new file mode 100644
index 0000000..cad5636
--- /dev/null
+++ b/client/src/config.ts
@@ -0,0 +1,26 @@
+/**
+ * 全局配置 — API 基础地址
+ *
+ * 小程序开发版 → dev.xiaocai.j35.site
+ * 小程序正式版 / H5  → 线上服务
+ */
+
+declare const wx: any
+
+function resolveApiBase(): string {
+  // H5 环境：同源相对路径
+  if (typeof window !== 'undefined') return '/api'
+
+  // 小程序环境：根据版本号判断
+  try {
+    // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+    const info = (wx as any).getAccountInfoSync?.()?.miniProgram
+    if (info?.envVersion === 'develop') {
+      return 'https://dev.xiaocai.j35.site/api'
+    }
+  } catch { /* ignore */ }
+
+  return 'https://xiaocai.j35.site/api'
+}
+
+export const API_BASE = resolveApiBase()
diff --git a/client/src/pages.json b/client/src/pages.json
index 0147442..0b2539f 100644
--- a/client/src/pages.json
+++ b/client/src/pages.json
@@ -51,6 +51,20 @@
         "navigationStyle": "custom",
         "navigationBarTitleText": "预算设置"
       }
+    },
+    {
+      "path": "pages/profile-edit/index",
+      "style": {
+        "navigationStyle": "custom",
+        "navigationBarTitleText": "编辑资料"
+      }
+    },
+    {
+      "path": "pages/group-manage/index",
+      "style": {
+        "navigationStyle": "custom",
+        "navigationBarTitleText": "一起记"
+      }
     }
   ],
   "globalStyle": {
diff --git a/client/src/pages/add/index.vue b/client/src/pages/add/index.vue
index 5fd4079..fdd9415 100644
--- a/client/src/pages/add/index.vue
+++ b/client/src/pages/add/index.vue
@@ -22,6 +22,7 @@
     <view class="amount-display">
       <text class="currency">¥</text>
       <text class="digits">{{ displayAmount }}</text>
+      <text class="cursor">|</text>
     </view>
 
     <scroll-view class="category-scroll" scroll-y :scroll-into-view="scrollToCat">
@@ -46,7 +47,7 @@
       </view>
     </view>
 
-    <Numpad @input="onInput" @delete="onDelete" @confirm="save" />
+    <Numpad v-model="amountStr" @confirm="save" />
 
     <SaveSuccess v-model:visible="showSuccess" :text="editId ? '修改成功' : '记账成功'" />
   </view>
@@ -86,8 +87,8 @@ const dateLabel = computed(() => {
 })
 
 const displayAmount = computed(() => {
-  const num = parseFloat(amountStr.value) || 0
-  return num.toFixed(2)
+  if (!amountStr.value) return ''
+  return amountStr.value
 })
 
 const currentCategories = computed(() => catStore.getByType(type.value))
@@ -151,33 +152,6 @@ function onDateChange(e: any) {
   selectedDate.value = e.detail.value
 }
 
-function onInput(key: string) {
-  if (key === '.' && amountStr.value.includes('.')) return
-  // When current value is '0', replace with new key (but '0' and '00' should stay as '0')
-  let next: string
-  if (amountStr.value === '0') {
-    next = (key === '0' || key === '00') ? '0' : key
-  } else {
-    next = amountStr.value + key
-  }
-  const num = parseFloat(next)
-  if (!isNaN(num) && num > 9999999.99) return
-  // Check decimal limit on the resulting value (handles "00" adding 2 chars)
-  if (next.includes('.')) {
-    const decimals = next.split('.')[1]
-    if (decimals && decimals.length > 2) return
-  }
-  amountStr.value = next
-}
-
-function onDelete() {
-  if (amountStr.value.length > 1) {
-    amountStr.value = amountStr.value.slice(0, -1)
-  } else {
-    amountStr.value = '0'
-  }
-}
-
 async function save() {
   if (saving.value) return
   const amount = Math.round(parseFloat(amountStr.value) * 100)
@@ -329,6 +303,18 @@ function goBack() {
   font-variant-numeric: tabular-nums;
 }
 
+.cursor {
+  font-family: 'Fredoka', monospace;
+  font-size: 88rpx;
+  font-weight: 300;
+  color: #FF8C69;
+  animation: blink 1s step-end infinite;
+}
+
+@keyframes blink {
+  50% { opacity: 0; }
+}
+
 .category-scroll {
   max-height: 320rpx;
 }
diff --git a/client/src/pages/bills/index.vue b/client/src/pages/bills/index.vue
index 9bcc24a..fae420f 100644
--- a/client/src/pages/bills/index.vue
+++ b/client/src/pages/bills/index.vue
@@ -71,8 +71,9 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted } from 'vue'
-import { onReachBottom, onPullDownRefresh } from '@dcloudio/uni-app'
+import { onShow, onReachBottom, onPullDownRefresh } from '@dcloudio/uni-app'
 import { useTransactionStore } from '@/stores/transaction'
+import { waitForReady } from '@/utils/app-ready'
 import TransactionItem from '@/components/TransactionItem/TransactionItem.vue'
 import Icon from '@/components/Icon/Icon.vue'
 import Skeleton from '@/components/Skeleton/Skeleton.vue'
@@ -106,7 +107,17 @@ const groupedTx = computed(() => {
   return Object.values(groups).sort((a, b) => b.date.localeCompare(a.date))
 })
 
-onMounted(() => loadTx(true))
+const initialLoaded = ref(false)
+
+onMounted(async () => {
+  await waitForReady()
+  loadTx(true).finally(() => { initialLoaded.value = true })
+})
+
+// 静默刷新（切换群组/返回时）
+onShow(() => {
+  if (initialLoaded.value) loadTx(true)
+})
 
 function switchFilter(type: string) {
   filterType.value = type
diff --git a/client/src/pages/budget/index.vue b/client/src/pages/budget/index.vue
index b0dabb7..7c4aca2 100644
--- a/client/src/pages/budget/index.vue
+++ b/client/src/pages/budget/index.vue
@@ -49,18 +49,13 @@
       <view class="section-title">自定义金额</view>
       <view class="custom-input">
         <text class="input-prefix">¥</text>
-        <text class="input-value" :class="{ placeholder: !amountStr }">
-          {{ amountStr || '0.00' }}
-        </text>
+        <text class="input-value" :class="{ placeholder: !amountStr }">{{ amountStr }}</text>
+        <text class="input-cursor">|</text>
         <text class="input-unit">元</text>
       </view>
 
       <!-- Numpad -->
-      <Numpad
-        @input="onInput"
-        @delete="onDelete"
-        @confirm="onConfirm"
-      />
+      <Numpad v-model="amountStr" @confirm="onConfirm" />
     </view>
   </view>
 </template>
@@ -113,32 +108,6 @@ function selectPreset(val: number) {
   amountStr.value = String(val)
 }
 
-function onInput(key: string) {
-  if (key === '.' && amountStr.value.includes('.')) return
-  if (key === '.' && !amountStr.value) {
-    amountStr.value = '0.'
-    return
-  }
-  let next: string
-  if (amountStr.value === '0') {
-    next = (key === '0' || key === '00') ? '0' : key
-  } else {
-    next = amountStr.value + key
-  }
-  const parts = next.split('.')
-  if (parts[1] && parts[1].length > 2) return
-  if (next.length > 10) return
-  amountStr.value = next
-}
-
-function onDelete() {
-  if (amountStr.value.length > 1) {
-    amountStr.value = amountStr.value.slice(0, -1)
-  } else {
-    amountStr.value = '0'
-  }
-}
-
 async function onConfirm() {
   const amount = Math.round(parseFloat(amountStr.value || '0') * 100)
   if (isNaN(amount) || amount <= 0) {
@@ -153,6 +122,7 @@ async function onConfirm() {
     await budgetStore.setBudget(amount, currentMonth)
     budget.value = budgetStore.budget
     uni.showToast({ title: '预算已设置', icon: 'success' })
+    setTimeout(() => uni.navigateBack(), 1500)
   } catch {
     uni.showToast({ title: '保存失败，请重试', icon: 'none' })
   }
@@ -348,4 +318,16 @@ function goBack() {
   font-size: 28rpx;
   color: #8B7E7E;
 }
+
+.input-cursor {
+  font-family: 'Fredoka', monospace;
+  font-size: 56rpx;
+  font-weight: 300;
+  color: #FF8C69;
+  animation: blink 1s step-end infinite;
+}
+
+@keyframes blink {
+  50% { opacity: 0; }
+}
 </style>
diff --git a/client/src/pages/group-manage/index.vue b/client/src/pages/group-manage/index.vue
new file mode 100644
index 0000000..825c118
--- /dev/null
+++ b/client/src/pages/group-manage/index.vue
@@ -0,0 +1,380 @@
+<template>
+  <view class="page">
+    <view class="header-fixed">
+      <view class="status-bar" :style="{ height: statusBarHeight + 'px' }"></view>
+      <view class="nav-bar">
+        <view class="nav-back" @tap="goBack">
+          <Icon name="arrowLeft" :size="40" color="#2D1B1B" />
+        </view>
+        <text class="nav-title">一起记</text>
+        <view style="width: 72rpx;"></view>
+      </view>
+    </view>
+
+    <!-- 创建群组 -->
+    <view class="action-card">
+      <text class="card-title">创建新群组</text>
+      <view class="action-row">
+        <input class="action-input" v-model="newGroupName" placeholder="群组名称" maxlength="100" />
+        <view class="action-btn" @tap="handleCreate">
+          <text class="action-btn-text">创建</text>
+        </view>
+      </view>
+    </view>
+
+    <!-- 加入群组 -->
+    <view class="action-card">
+      <text class="card-title">加入群组</text>
+      <view class="action-row">
+        <input class="action-input" v-model="inviteCode" placeholder="输入邀请码" maxlength="6" />
+        <view class="action-btn" @tap="handleJoin">
+          <text class="action-btn-text">加入</text>
+        </view>
+      </view>
+    </view>
+
+    <!-- 我的群组列表 -->
+    <view class="section-header">
+      <text class="section-title">我的群组</text>
+    </view>
+
+    <view v-if="groupStore.loading" class="loading-box">
+      <text class="loading-text">加载中...</text>
+    </view>
+
+    <view v-else-if="groupStore.groups.length === 0" class="empty-box">
+      <Icon name="user" :size="48" color="#BFB3B3" />
+      <text class="empty-text">还没有加入任何群组</text>
+    </view>
+
+    <view v-else class="group-list">
+      <view v-for="group in groupStore.groups" :key="group.id" class="group-item">
+        <view class="group-icon">
+          <Icon name="user" :size="32" color="#FF8C69" />
+        </view>
+        <view class="group-info">
+          <text class="group-name">{{ group.name }}</text>
+          <text class="group-meta">{{ group.member_count }} 人 · {{ group.role === 'owner' ? '群主' : '成员' }}</text>
+          <view class="invite-row" @tap="copyInviteCode(group.invite_code)">
+            <text class="invite-label">邀请码：</text>
+            <text class="invite-code">{{ group.invite_code }}</text>
+            <text class="invite-copy">复制</text>
+          </view>
+        </view>
+        <view class="group-actions">
+          <view v-if="group.role === 'owner'" class="group-btn dissolve" @tap="handleDissolve(group)">
+            <text class="group-btn-text dissolve-text">解散</text>
+          </view>
+          <view v-else class="group-btn leave" @tap="handleLeave(group)">
+            <text class="group-btn-text leave-text">退出</text>
+          </view>
+        </view>
+      </view>
+    </view>
+  </view>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted } from 'vue'
+import { useGroupStore } from '@/stores/group'
+import { statusBarHeight } from '@/utils/system'
+import Icon from '@/components/Icon/Icon.vue'
+
+const groupStore = useGroupStore()
+
+const newGroupName = ref('')
+const inviteCode = ref('')
+
+onMounted(() => {
+  groupStore.fetchGroups()
+})
+
+function goBack() {
+  uni.navigateBack()
+}
+
+function copyInviteCode(code: string) {
+  uni.setClipboardData({
+    data: code,
+    success: () => uni.showToast({ title: '已复制', icon: 'success' })
+  })
+}
+
+async function handleCreate() {
+  const name = newGroupName.value.trim()
+  if (!name) {
+    uni.showToast({ title: '请输入群组名称', icon: 'none' })
+    return
+  }
+  try {
+    const result = await groupStore.createGroup(name)
+    newGroupName.value = ''
+    uni.setClipboardData({
+      data: result.invite_code,
+      success: () => {
+        uni.showModal({
+          title: '创建成功',
+          content: `邀请码 ${result.invite_code} 已复制，分享给好友即可加入`,
+          showCancel: false
+        })
+      }
+    })
+  } catch (e: any) {
+    uni.showToast({ title: e.message || '创建失败', icon: 'none' })
+  }
+}
+
+async function handleJoin() {
+  const code = inviteCode.value.trim().toUpperCase()
+  if (!code) {
+    uni.showToast({ title: '请输入邀请码', icon: 'none' })
+    return
+  }
+  try {
+    const result = await groupStore.joinGroup(code)
+    inviteCode.value = ''
+    uni.showToast({ title: `已加入「${result.name}」`, icon: 'success' })
+  } catch (e: any) {
+    uni.showToast({ title: e.message || '加入失败', icon: 'none' })
+  }
+}
+
+function handleLeave(group: any) {
+  uni.showModal({
+    title: '退出群组',
+    content: `确定退出「${group.name}」？你在该群组的记录将回到个人账本。`,
+    success: async (res) => {
+      if (res.confirm) {
+        try {
+          await groupStore.leaveGroup(group.id)
+          uni.showToast({ title: '已退出', icon: 'success' })
+        } catch (e: any) {
+          uni.showToast({ title: e.message || '退出失败', icon: 'none' })
+        }
+      }
+    }
+  })
+}
+
+function handleDissolve(group: any) {
+  uni.showModal({
+    title: '解散群组',
+    content: `确定解散「${group.name}」？群组记录将回到各成员的个人账本。`,
+    success: async (res) => {
+      if (res.confirm) {
+        try {
+          await groupStore.deleteGroup(group.id)
+          uni.showToast({ title: '已解散', icon: 'success' })
+        } catch (e: any) {
+          uni.showToast({ title: e.message || '解散失败', icon: 'none' })
+        }
+      }
+    }
+  })
+}
+</script>
+
+<style lang="scss" scoped>
+.page {
+  min-height: 100vh;
+  background: #FFF8F0;
+  padding: 0 0 180rpx;
+}
+
+.header-fixed {
+  position: sticky;
+  top: 0;
+  z-index: 100;
+  background: #FFF8F0;
+}
+
+.status-bar { background: #FFF8F0; }
+
+.nav-bar {
+  display: flex;
+  align-items: center;
+  padding: 16rpx 40rpx 24rpx;
+}
+
+.nav-back {
+  width: 72rpx;
+  height: 72rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.nav-title {
+  flex: 1;
+  text-align: center;
+  font-size: 36rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+}
+
+.action-card {
+  margin: 24rpx 40rpx 0;
+  padding: 32rpx 40rpx;
+  background: #FFFFFF;
+  border-radius: 40rpx;
+  border: 2rpx solid #F0E0D6;
+  box-shadow: 4rpx 4rpx 12rpx rgba(45, 27, 27, 0.08);
+}
+
+.card-title {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+  display: block;
+  margin-bottom: 20rpx;
+}
+
+.action-row {
+  display: flex;
+  gap: 16rpx;
+}
+
+.action-input {
+  flex: 1;
+  height: 80rpx;
+  padding: 0 24rpx;
+  background: #FFF8F0;
+  border-radius: 20rpx;
+  border: 2rpx solid #F0E0D6;
+  font-size: 28rpx;
+  color: #2D1B1B;
+}
+
+.action-btn {
+  height: 80rpx;
+  padding: 0 32rpx;
+  background: linear-gradient(135deg, #FF8C69, #E67355);
+  border-radius: 20rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.action-btn-text {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #FFFFFF;
+  white-space: nowrap;
+}
+
+.section-header {
+  padding: 40rpx 40rpx 16rpx;
+}
+
+.section-title {
+  font-size: 28rpx;
+  font-weight: 500;
+  color: #8B7E7E;
+}
+
+.loading-box, .empty-box {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 16rpx;
+  padding: 80rpx 0;
+}
+
+.loading-text, .empty-text {
+  font-size: 28rpx;
+  color: #BFB3B3;
+}
+
+.group-list {
+  padding: 0 40rpx;
+}
+
+.group-item {
+  display: flex;
+  align-items: center;
+  padding: 28rpx 32rpx;
+  margin-bottom: 16rpx;
+  background: #FFFFFF;
+  border-radius: 28rpx;
+  border: 2rpx solid #F0E0D6;
+  box-shadow: 4rpx 4rpx 12rpx rgba(45, 27, 27, 0.08);
+  gap: 24rpx;
+}
+
+.group-icon {
+  width: 80rpx;
+  height: 80rpx;
+  border-radius: 50%;
+  background: #FFF0E6;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  flex-shrink: 0;
+}
+
+.group-info {
+  flex: 1;
+  min-width: 0;
+}
+
+.group-name {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+  display: block;
+}
+
+.group-meta {
+  font-size: 24rpx;
+  color: #BFB3B3;
+  display: block;
+  margin-top: 4rpx;
+}
+
+.invite-row {
+  display: flex;
+  align-items: center;
+  margin-top: 8rpx;
+  gap: 4rpx;
+}
+
+.invite-label {
+  font-size: 24rpx;
+  color: #8B7E7E;
+}
+
+.invite-code {
+  font-size: 24rpx;
+  font-weight: 600;
+  color: #FF8C69;
+  font-family: 'Fredoka', monospace;
+}
+
+.invite-copy {
+  font-size: 22rpx;
+  color: #FF8C69;
+  margin-left: 8rpx;
+  text-decoration: underline;
+}
+
+.group-actions {
+  flex-shrink: 0;
+}
+
+.group-btn {
+  padding: 12rpx 24rpx;
+  border-radius: 16rpx;
+
+  &.leave { background: #FFF0E6; }
+  &.dissolve { background: #FFE8E8; }
+}
+
+.group-btn-text {
+  font-size: 24rpx;
+  font-weight: 500;
+
+  &.leave-text { color: #FF8C69; }
+  &.dissolve-text { color: #FF6B6B; }
+}
+</style>
diff --git a/client/src/pages/index/index.vue b/client/src/pages/index/index.vue
index ab11273..d211334 100644
--- a/client/src/pages/index/index.vue
+++ b/client/src/pages/index/index.vue
@@ -2,11 +2,12 @@
   <view class="page">
     <view class="header-fixed">
       <view class="status-bar" :style="{ height: statusBarHeight + 'px' }"></view>
-      <view class="header">
+      <view class="header" :style="{ paddingRight: capsuleRight + 'px' }">
         <view class="avatar-wrap">
-          <Icon name="user" :size="36" color="#8B7E7E" />
+          <image v-if="userStore.avatarUrl" :src="userStore.avatarUrl" class="avatar-img" mode="aspectFill" />
+          <Icon v-else name="user" :size="36" color="#8B7E7E" />
         </view>
-        <text class="greeting">{{ greeting }}，小菜</text>
+        <text class="greeting">{{ greeting }}，{{ userStore.nickname }}</text>
         <view class="bell" @tap="showNotification">
           <Icon name="bell" :size="40" color="#8B7E7E" />
         </view>
@@ -117,9 +118,12 @@ import { onShow, onPullDownRefresh } from '@dcloudio/uni-app'
 import { useTransactionStore } from '@/stores/transaction'
 import { useStatsStore } from '@/stores/stats'
 import { useBudgetStore } from '@/stores/budget'
+import { useUserStore } from '@/stores/user'
+import { useGroupStore } from '@/stores/group'
+import { waitForReady } from '@/utils/app-ready'
 import { getOverview } from '@/api/stats'
 import { formatAmount, formatAmountRaw } from '@/utils/format'
-import { statusBarHeight } from '@/utils/system'
+import { statusBarHeight, capsuleRight } from '@/utils/system'
 import BudgetBar from '@/components/BudgetBar/BudgetBar.vue'
 import TransactionItem from '@/components/TransactionItem/TransactionItem.vue'
 import Icon from '@/components/Icon/Icon.vue'
@@ -128,11 +132,13 @@ import Skeleton from '@/components/Skeleton/Skeleton.vue'
 const txStore = useTransactionStore()
 const statsStore = useStatsStore()
 const budgetStore = useBudgetStore()
+const userStore = useUserStore()
+const groupStore = useGroupStore()
 
 const DEFAULT_BUDGET = 500000 // 5000元（分）
 
-const overview = ref({ expense: 0, income: 0, count: 0, daily: 0 })
-const budget = ref<any>(null)
+const overview = computed(() => statsStore.overview)
+const budget = computed(() => budgetStore.budget)
 const recentTx = ref<any[]>([])
 const loading = ref(true)
 const loadError = ref(false)
@@ -149,9 +155,10 @@ const greeting = computed(() => {
   return '晚上好'
 })
 
-async function loadData() {
+async function loadData(silent = false) {
+  await waitForReady()
   try {
-    loading.value = true
+    if (!silent) loading.value = true
     loadError.value = false
     const now = new Date()
     const today = `${now.getFullYear()}-${String(now.getMonth() + 1).padStart(2, '0')}-${String(now.getDate()).padStart(2, '0')}`
@@ -159,14 +166,13 @@ async function loadData() {
       statsStore.fetchOverview(),
       budgetStore.fetchBudget(),
       txStore.fetchTransactions({ page: 1 }),
-      fetchTodayData(today)
+      fetchTodayData(today),
+      userStore.fetchUserInfo()
     ])
-    overview.value = statsStore.overview
-    budget.value = budgetStore.budget
     recentTx.value = txStore.transactions.slice(0, 5)
   } catch (e) {
     console.error('Load error:', e)
-    loadError.value = true
+    if (!silent) loadError.value = true
   } finally {
     loading.value = false
   }
@@ -174,7 +180,7 @@ async function loadData() {
 
 async function fetchTodayData(today: string) {
   try {
-    const data = await getOverview({ startDate: today, endDate: today })
+    const data = await getOverview({ startDate: today, endDate: today, group_id: groupStore.currentGroupId })
     todayExpense.value = data.expense || 0
     todayIncome.value = data.income || 0
     todayCount.value = data.count || 0
@@ -192,7 +198,7 @@ onMounted(() => {
 
 // Refresh data when returning from other pages (e.g., after adding a transaction)
 onShow(() => {
-  if (initialLoaded.value && !loading.value) loadData()
+  if (initialLoaded.value && !loading.value) loadData(true)
 })
 
 onPullDownRefresh(() => {
@@ -249,6 +255,12 @@ function goBills() {
   display: flex;
   align-items: center;
   justify-content: center;
+  overflow: hidden;
+}
+
+.avatar-img {
+  width: 100%;
+  height: 100%;
 }
 
 .greeting {
diff --git a/client/src/pages/profile-edit/index.vue b/client/src/pages/profile-edit/index.vue
new file mode 100644
index 0000000..a212af8
--- /dev/null
+++ b/client/src/pages/profile-edit/index.vue
@@ -0,0 +1,250 @@
+<template>
+  <view class="page">
+    <view class="header-fixed">
+      <view class="status-bar" :style="{ height: statusBarHeight + 'px' }"></view>
+      <view class="nav-bar" :style="{ paddingRight: capsuleRight + 'px' }">
+        <view class="nav-back" @tap="goBack">
+          <Icon name="arrowLeft" :size="40" color="#2D1B1B" />
+        </view>
+        <text class="nav-title">编辑资料</text>
+        <view class="nav-save" @tap="saveProfile">
+          <text class="save-text">保存</text>
+        </view>
+      </view>
+    </view>
+
+    <view class="avatar-section">
+      <view class="avatar-wrap" @tap="chooseAvatar">
+        <image v-if="previewUrl" :src="previewUrl" class="avatar-img" mode="aspectFill" />
+        <Icon v-else name="user" :size="64" color="#FFFFFF" />
+        <view class="avatar-badge">
+          <Icon name="edit" :size="24" color="#FFFFFF" />
+        </view>
+      </view>
+      <text class="avatar-hint">点击更换头像</text>
+    </view>
+
+    <view class="form-card">
+      <view class="form-item">
+        <text class="form-label">昵称</text>
+        <input class="form-input" v-model="formNickname" placeholder="请输入昵称" maxlength="50" />
+      </view>
+    </view>
+
+    <view class="tips-card">
+      <text class="tips-title">提示</text>
+      <text class="tips-text">• 昵称最长 50 个字符</text>
+      <text class="tips-text">• 头像支持 JPG、PNG 格式，最大 2MB</text>
+    </view>
+  </view>
+</template>
+
+<script setup lang="ts">
+import { ref, onMounted } from 'vue'
+import { useUserStore } from '@/stores/user'
+import { statusBarHeight, capsuleRight } from '@/utils/system'
+import Icon from '@/components/Icon/Icon.vue'
+
+const userStore = useUserStore()
+const formNickname = ref('')
+const previewUrl = ref('')
+const uploading = ref(false)
+const saving = ref(false)
+
+onMounted(() => {
+  formNickname.value = userStore.nickname
+  previewUrl.value = userStore.avatarUrl
+})
+
+function goBack() {
+  uni.navigateBack()
+}
+
+function chooseAvatar() {
+  uni.chooseImage({
+    count: 1,
+    sizeType: ['compressed'],
+    sourceType: ['album', 'camera'],
+    success: async (res) => {
+      const tempPath = res.tempFilePaths[0]
+      previewUrl.value = tempPath
+      uploading.value = true
+      try {
+        await userStore.uploadAvatar(tempPath)
+        uni.showToast({ title: '头像已更新', icon: 'success' })
+      } catch {
+        uni.showToast({ title: '头像上传失败', icon: 'none' })
+        previewUrl.value = userStore.avatarUrl
+      } finally {
+        uploading.value = false
+      }
+    }
+  })
+}
+
+async function saveProfile() {
+  if (saving.value || uploading.value) return
+  const nickname = formNickname.value.trim()
+  if (!nickname) {
+    uni.showToast({ title: '请输入昵称', icon: 'none' })
+    return
+  }
+  saving.value = true
+  try {
+    await userStore.updateProfile(nickname)
+    uni.showToast({ title: '保存成功', icon: 'success' })
+    setTimeout(() => uni.navigateBack(), 1500)
+  } catch {
+    uni.showToast({ title: '保存失败', icon: 'none' })
+  } finally {
+    saving.value = false
+  }
+}
+</script>
+
+<style lang="scss" scoped>
+.page {
+  min-height: 100vh;
+  background: #FFF8F0;
+  padding: 0 0 180rpx;
+}
+
+.header-fixed {
+  position: sticky;
+  top: 0;
+  z-index: 100;
+  background: #FFF8F0;
+}
+
+.status-bar { background: #FFF8F0; }
+
+.nav-bar {
+  display: flex;
+  align-items: center;
+  padding: 16rpx 40rpx 24rpx;
+}
+
+.nav-back {
+  width: 72rpx;
+  height: 72rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.nav-title {
+  flex: 1;
+  text-align: center;
+  font-size: 36rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+}
+
+.nav-save {
+  width: 72rpx;
+  height: 72rpx;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.save-text {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #FF8C69;
+}
+
+.avatar-section {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  padding: 48rpx 0 32rpx;
+}
+
+.avatar-wrap {
+  width: 160rpx;
+  height: 160rpx;
+  border-radius: 50%;
+  border: 6rpx solid rgba(255, 255, 255, 0.5);
+  background: linear-gradient(135deg, #FF8C69, #FFB89A);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  position: relative;
+  overflow: hidden;
+}
+
+.avatar-img { width: 100%; height: 100%; }
+
+.avatar-badge {
+  position: absolute;
+  bottom: 0;
+  right: 0;
+  width: 48rpx;
+  height: 48rpx;
+  border-radius: 50%;
+  background: rgba(0, 0, 0, 0.4);
+  display: flex;
+  align-items: center;
+  justify-content: center;
+}
+
+.avatar-hint {
+  font-size: 24rpx;
+  color: #BFB3B3;
+  margin-top: 16rpx;
+}
+
+.form-card {
+  margin: 32rpx 40rpx 0;
+  background: #FFFFFF;
+  border-radius: 40rpx;
+  border: 2rpx solid #F0E0D6;
+  box-shadow: 4rpx 4rpx 12rpx rgba(45, 27, 27, 0.08);
+  overflow: hidden;
+}
+
+.form-item {
+  display: flex;
+  align-items: center;
+  padding: 32rpx 40rpx;
+}
+
+.form-label {
+  width: 120rpx;
+  font-size: 28rpx;
+  font-weight: 500;
+  color: #2D1B1B;
+  flex-shrink: 0;
+}
+
+.form-input {
+  flex: 1;
+  font-size: 28rpx;
+  color: #2D1B1B;
+}
+
+.tips-card {
+  margin: 32rpx 40rpx 0;
+  padding: 32rpx 40rpx;
+  background: #FFFFFF;
+  border-radius: 40rpx;
+  border: 2rpx solid #F0E0D6;
+  box-shadow: 4rpx 4rpx 12rpx rgba(45, 27, 27, 0.08);
+}
+
+.tips-title {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+  display: block;
+  margin-bottom: 16rpx;
+}
+
+.tips-text {
+  font-size: 24rpx;
+  color: #8B7E7E;
+  display: block;
+  margin-bottom: 8rpx;
+}
+</style>
diff --git a/client/src/pages/profile/index.vue b/client/src/pages/profile/index.vue
index af1fbae..2fb630d 100644
--- a/client/src/pages/profile/index.vue
+++ b/client/src/pages/profile/index.vue
@@ -5,15 +5,27 @@
       <text class="page-title">我的</text>
     </view>
 
-    <view class="profile-card">
+    <view class="profile-card" @tap="goProfileEdit">
       <view class="p-avatar">
-        <Icon name="user" :size="64" color="#FFFFFF" />
+        <image v-if="userStore.avatarUrl" :src="userStore.avatarUrl" class="p-avatar-img" mode="aspectFill" />
+        <Icon v-else name="user" :size="64" color="#FFFFFF" />
       </view>
       <view class="p-info">
-        <text class="p-name">小菜</text>
+        <text class="p-name">{{ userStore.nickname }}</text>
         <text class="p-tagline">记账小能手</text>
         <text class="p-streak">累计 {{ txStore.total }} 笔记录</text>
       </view>
+      <Icon name="chevronRight" :size="28" color="rgba(255,255,255,0.6)" />
+    </view>
+
+    <!-- 身份切换 -->
+    <view class="identity-card" @tap="showIdentityPicker">
+      <Icon name="user" :size="32" color="#FF8C69" />
+      <view class="id-info">
+        <text class="id-name">{{ groupStore.isGroupMode ? groupStore.currentGroup?.name : '个人账本' }}</text>
+        <text class="id-desc">{{ groupStore.isGroupMode ? groupStore.currentGroup?.member_count + ' 人共享' : '仅自己可见' }}</text>
+      </view>
+      <Icon name="chevronRight" :size="24" color="#BFB3B3" />
     </view>
 
     <view class="quick-stats">
@@ -64,14 +76,54 @@
         </view>
       </view>
     </view>
+
+    <!-- 身份选择弹窗 -->
+    <view class="modal-mask" v-if="showIdentity" @tap="showIdentity = false">
+      <view class="identity-modal" @tap.stop>
+        <text class="modal-title">切换账本</text>
+
+        <view class="id-option" :class="{ active: !groupStore.isGroupMode }" @tap="switchToPersonal">
+          <Icon name="user" :size="36" :color="!groupStore.isGroupMode ? '#FF8C69' : '#8B7E7E'" />
+          <text class="id-option-name">个人账本</text>
+          <Icon v-if="!groupStore.isGroupMode" name="check" :size="28" color="#FF8C69" />
+        </view>
+
+        <view v-for="g in groupStore.groups" :key="g.id"
+          class="id-option" :class="{ active: groupStore.currentGroupId === g.id }"
+          @tap="switchToGroup(g.id)">
+          <Icon name="user" :size="36" :color="groupStore.currentGroupId === g.id ? '#FF8C69' : '#8B7E7E'" />
+          <view class="id-option-info">
+            <text class="id-option-name">{{ g.name }}</text>
+            <text class="id-option-desc">{{ g.member_count }} 人</text>
+          </view>
+          <Icon v-if="groupStore.currentGroupId === g.id" name="check" :size="28" color="#FF8C69" />
+        </view>
+
+        <view class="id-actions">
+          <view class="id-action-btn" @tap="promptCreateGroup">
+            <text class="id-action-text">创建群组</text>
+          </view>
+          <view class="id-action-btn" @tap="promptJoinGroup">
+            <text class="id-action-text">加入群组</text>
+          </view>
+        </view>
+
+        <view class="id-manage" @tap="goGroupManage">
+          <text class="id-manage-text">管理群组</text>
+        </view>
+      </view>
+    </view>
   </view>
 </template>
 
 <script setup lang="ts">
-import { ref, onMounted } from 'vue'
+import { ref, computed, onMounted } from 'vue'
 import { useTransactionStore } from '@/stores/transaction'
 import { useStatsStore } from '@/stores/stats'
 import { useBudgetStore } from '@/stores/budget'
+import { useUserStore } from '@/stores/user'
+import { useGroupStore } from '@/stores/group'
+import { waitForReady } from '@/utils/app-ready'
 import { getTransactions } from '@/api/transaction'
 import { formatAmount } from '@/utils/format'
 import { statusBarHeight } from '@/utils/system'
@@ -80,22 +132,26 @@ import Icon from '@/components/Icon/Icon.vue'
 const txStore = useTransactionStore()
 const statsStore = useStatsStore()
 const budgetStore = useBudgetStore()
+const userStore = useUserStore()
+const groupStore = useGroupStore()
 
-const overview = ref({ expense: 0, income: 0, count: 0, daily: 0 })
-const budget = ref<any>(null)
+const overview = computed(() => statsStore.overview)
+const budget = computed(() => budgetStore.budget)
 const loading = ref(true)
 const showAbout = ref(false)
+const showIdentity = ref(false)
 
 onMounted(async () => {
+  await waitForReady()
   loading.value = true
   try {
     await Promise.all([
       statsStore.fetchOverview(),
       budgetStore.fetchBudget(),
-      txStore.fetchTransactions({ page: 1, pageSize: 1 })
+      txStore.fetchTransactions({ page: 1, pageSize: 1 }),
+      userStore.fetchUserInfo(),
+      groupStore.fetchGroups()
     ])
-    overview.value = statsStore.overview
-    budget.value = budgetStore.budget
   } catch (e) {
     console.error('Profile load error:', e)
   } finally {
@@ -111,6 +167,94 @@ function goCategoryManage() {
   uni.navigateTo({ url: '/pages/category-manage/index' })
 }
 
+function goProfileEdit() {
+  uni.navigateTo({ url: '/pages/profile-edit/index' })
+}
+
+function showIdentityPicker() {
+  showIdentity.value = true
+}
+
+function switchToPersonal() {
+  groupStore.switchToPersonal()
+  showIdentity.value = false
+}
+
+function switchToGroup(id: number) {
+  groupStore.switchToGroup(id)
+  showIdentity.value = false
+}
+
+function goGroupManage() {
+  showIdentity.value = false
+  uni.navigateTo({ url: '/pages/group-manage/index' })
+}
+
+function promptCreateGroup() {
+  // #ifdef MP-WEIXIN
+  // 小程序不支持 prompt，使用输入框页面
+  uni.showModal({
+    title: '创建群组',
+    editable: true,
+    placeholderText: '请输入群组名称',
+    success: async (res) => {
+      if (res.confirm && res.content) {
+        try {
+          const result = await groupStore.createGroup(res.content.trim())
+          uni.setClipboardData({
+            data: result.invite_code,
+            success: () => uni.showToast({ title: '邀请码已复制', icon: 'success' })
+          })
+        } catch (e: any) {
+          uni.showToast({ title: e.message || '创建失败', icon: 'none' })
+        }
+      }
+    }
+  })
+  // #endif
+  // #ifdef H5
+  const name = window.prompt('请输入群组名称')
+  if (name) {
+    groupStore.createGroup(name.trim()).then((result) => {
+      navigator.clipboard?.writeText(result.invite_code)
+      uni.showToast({ title: `邀请码 ${result.invite_code} 已复制`, icon: 'success' })
+    }).catch((e: any) => {
+      uni.showToast({ title: e.message || '创建失败', icon: 'none' })
+    })
+  }
+  // #endif
+}
+
+function promptJoinGroup() {
+  // #ifdef MP-WEIXIN
+  uni.showModal({
+    title: '加入群组',
+    editable: true,
+    placeholderText: '请输入邀请码',
+    success: async (res) => {
+      if (res.confirm && res.content) {
+        try {
+          const result = await groupStore.joinGroup(res.content.trim())
+          uni.showToast({ title: `已加入「${result.name}」`, icon: 'success' })
+        } catch (e: any) {
+          uni.showToast({ title: e.message || '加入失败', icon: 'none' })
+        }
+      }
+    }
+  })
+  // #endif
+  // #ifdef H5
+  const code = window.prompt('请输入邀请码')
+  if (code) {
+    groupStore.joinGroup(code.trim()).then((result) => {
+      uni.showToast({ title: `已加入「${result.name}」`, icon: 'success' })
+    }).catch((e: any) => {
+      uni.showToast({ title: e.message || '加入失败', icon: 'none' })
+    })
+  }
+  // #endif
+}
+
 function getLocalDateStr(): string {
   const d = new Date()
   return `${d.getFullYear()}-${String(d.getMonth() + 1).padStart(2, '0')}-${String(d.getDate()).padStart(2, '0')}`
@@ -119,15 +263,21 @@ function getLocalDateStr(): string {
 async function exportData() {
   uni.showLoading({ title: '导出中...' })
   try {
-    const data = await getTransactions({ page: 1, pageSize: 9999 })
-    const list = data.list
-    if (!list || list.length === 0) {
+    // 分页获取全部数据（服务端 pageSize 上限 100）
+    const allList: any[] = []
+    let page = 1
+    let total = 0
+    do {
+      const data = await getTransactions({ page, pageSize: 100, group_id: groupStore.currentGroupId })
+      allList.push(...data.list)
+      total = data.total
+      page++
+    } while (allList.length < total)
+
+    if (allList.length === 0) {
       uni.showToast({ title: '暂无数据', icon: 'none' })
       return
     }
-    if (data.total > list.length) {
-      uni.showToast({ title: `共${data.total}条，仅导出前${list.length}条`, icon: 'none' })
-    }
 
     function csvEscape(val: string): string {
       if (val.includes(',') || val.includes('"') || val.includes('\n')) {
@@ -136,7 +286,7 @@ async function exportData() {
       return val
     }
     const header = '日期,类型,分类,金额(元),备注\n'
-    const rows = list.map(t => {
+    const rows = allList.map(t => {
       const amount = (t.amount / 100).toFixed(2)
       const type = t.type === 'expense' ? '支出' : '收入'
       return [t.date, type, t.category_name || '未分类', amount, t.note || ''].map(csvEscape).join(',')
@@ -379,4 +529,129 @@ async function exportData() {
     color: #FFFFFF;
   }
 }
+
+.p-avatar-img {
+  width: 100%;
+  height: 100%;
+  border-radius: 50%;
+}
+
+.identity-card {
+  margin: 24rpx 40rpx 0;
+  padding: 28rpx 32rpx;
+  background: #FFFFFF;
+  border-radius: 28rpx;
+  border: 2rpx solid #F0E0D6;
+  box-shadow: 4rpx 4rpx 12rpx rgba(45, 27, 27, 0.08);
+  display: flex;
+  align-items: center;
+  gap: 20rpx;
+}
+
+.id-info {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+
+.id-name {
+  font-size: 28rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+}
+
+.id-desc {
+  font-size: 24rpx;
+  color: #BFB3B3;
+  margin-top: 4rpx;
+}
+
+.identity-modal {
+  position: fixed;
+  bottom: 0;
+  left: 0;
+  right: 0;
+  background: #FFFFFF;
+  border-radius: 40rpx 40rpx 0 0;
+  padding: 40rpx;
+  padding-bottom: calc(40rpx + env(safe-area-inset-bottom));
+  max-height: 70vh;
+  overflow-y: auto;
+}
+
+.modal-title {
+  font-size: 32rpx;
+  font-weight: 600;
+  color: #2D1B1B;
+  display: block;
+  text-align: center;
+  margin-bottom: 32rpx;
+}
+
+.id-option {
+  display: flex;
+  align-items: center;
+  gap: 20rpx;
+  padding: 28rpx 24rpx;
+  border-radius: 20rpx;
+  margin-bottom: 12rpx;
+
+  &.active { background: #FFF0E6; }
+  &:active { background: #FFF8F0; }
+}
+
+.id-option-info {
+  flex: 1;
+  display: flex;
+  flex-direction: column;
+}
+
+.id-option-name {
+  font-size: 28rpx;
+  font-weight: 500;
+  color: #2D1B1B;
+}
+
+.id-option-desc {
+  font-size: 24rpx;
+  color: #BFB3B3;
+  margin-top: 2rpx;
+}
+
+.id-actions {
+  display: flex;
+  gap: 24rpx;
+  margin-top: 24rpx;
+  padding-top: 24rpx;
+  border-top: 1rpx solid #F0E0D6;
+}
+
+.id-action-btn {
+  flex: 1;
+  height: 80rpx;
+  border-radius: 20rpx;
+  background: #FFF0E6;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+
+  &:active { background: #FFE8D6; }
+}
+
+.id-action-text {
+  font-size: 28rpx;
+  font-weight: 500;
+  color: #FF8C69;
+}
+
+.id-manage {
+  margin-top: 16rpx;
+  padding: 20rpx;
+  text-align: center;
+}
+
+.id-manage-text {
+  font-size: 26rpx;
+  color: #8B7E7E;
+}
 </style>
diff --git a/client/src/pages/stats/index.vue b/client/src/pages/stats/index.vue
index 81c54be..9a26517 100644
--- a/client/src/pages/stats/index.vue
+++ b/client/src/pages/stats/index.vue
@@ -119,8 +119,9 @@
 
 <script setup lang="ts">
 import { ref, computed, onMounted, watch } from 'vue'
-import { onPullDownRefresh } from '@dcloudio/uni-app'
+import { onShow, onPullDownRefresh } from '@dcloudio/uni-app'
 import { useStatsStore } from '@/stores/stats'
+import { waitForReady } from '@/utils/app-ready'
 import { getTransactions } from '@/api/transaction'
 import { getOverview } from '@/api/stats'
 import { formatAmount, formatMonth, getCurrentMonth } from '@/utils/format'
@@ -133,9 +134,9 @@ const statsStore = useStatsStore()
 
 const currentMonth = ref(getCurrentMonth())
 const tabType = ref<'expense' | 'income'>('expense')
-const overview = ref({ expense: 0, income: 0, count: 0, daily: 0 })
-const categoryStats = ref<any[]>([])
-const trendData = ref<any[]>([])
+const overview = computed(() => statsStore.overview)
+const categoryStats = computed(() => statsStore.categoryStats)
+const trendData = computed(() => statsStore.trendData)
 const loading = ref(true)
 const loadError = ref(false)
 const maxSingle = ref(0)
@@ -221,15 +222,24 @@ const monthCompareText = computed(() => {
   return '持平'
 })
 
-onMounted(() => loadData())
+const initialLoaded = ref(false)
+
+onMounted(async () => {
+  await waitForReady()
+  loadData().finally(() => { initialLoaded.value = true })
+})
+
+onShow(() => {
+  if (initialLoaded.value) loadData(true)
+})
 
 // Only re-fetch category/trend on tab switch; re-fetch all on month change
 watch(currentMonth, () => loadData())
 watch(tabType, () => loadTabData())
 
-async function loadData() {
+async function loadData(silent = false) {
   try {
-    loading.value = true
+    if (!silent) loading.value = true
     loadError.value = false
     await Promise.all([
       statsStore.fetchOverview(currentMonth.value),
@@ -238,9 +248,6 @@ async function loadData() {
       fetchMaxSingle(),
       fetchPrevMonthData()
     ])
-    overview.value = statsStore.overview
-    categoryStats.value = statsStore.categoryStats
-    trendData.value = statsStore.trendData
   } catch (e) {
     console.error('Stats load error:', e)
     loadError.value = true
@@ -259,9 +266,6 @@ async function loadTabData() {
       fetchMaxSingle(),
       fetchPrevMonthData()
     ])
-    overview.value = statsStore.overview
-    categoryStats.value = statsStore.categoryStats
-    trendData.value = statsStore.trendData
   } catch (e) {
     console.error('Stats tab load error:', e)
   }
diff --git a/client/src/stores/budget.ts b/client/src/stores/budget.ts
index c3d8472..a620e43 100644
--- a/client/src/stores/budget.ts
+++ b/client/src/stores/budget.ts
@@ -2,6 +2,7 @@ import { defineStore } from 'pinia'
 import { ref } from 'vue'
 import * as api from '@/api/budget'
 import { getCurrentMonth } from '@/utils/format'
+import { useGroupStore } from '@/stores/group'
 
 // 重新导出类型以保持向后兼容
 export type Budget = api.Budget
@@ -13,7 +14,8 @@ export const useBudgetStore = defineStore('budget', () => {
   async function fetchBudget(month?: string) {
     loading.value = true
     try {
-      budget.value = await api.getBudget(month || getCurrentMonth())
+      const groupStore = useGroupStore()
+      budget.value = await api.getBudget(month || getCurrentMonth(), groupStore.currentGroupId)
     } catch {
       budget.value = null
     } finally {
diff --git a/client/src/stores/group.ts b/client/src/stores/group.ts
new file mode 100644
index 0000000..2657606
--- /dev/null
+++ b/client/src/stores/group.ts
@@ -0,0 +1,113 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import * as api from '@/api/group'
+import { useStatsStore } from '@/stores/stats'
+import { useBudgetStore } from '@/stores/budget'
+import { useTransactionStore } from '@/stores/transaction'
+
+export const useGroupStore = defineStore('group', () => {
+  const groups = ref<api.Group[]>([])
+  const loading = ref(false)
+
+  /** 当前选中的群组 ID，null 表示个人模式 */
+  const currentGroupId = ref<number | null>(null)
+
+  /** 当前群组信息 */
+  const currentGroup = computed(() => {
+    if (currentGroupId.value === null) return null
+    return groups.value.find(g => g.id === currentGroupId.value) || null
+  })
+
+  /** 是否处于群组模式 */
+  const isGroupMode = computed(() => currentGroupId.value !== null)
+
+  /** 切换到个人模式 */
+  function switchToPersonal() {
+    currentGroupId.value = null
+    uni.removeStorageSync('xc:currentGroupId')
+    refreshAll()
+  }
+
+  /** 切换到群组模式 */
+  function switchToGroup(groupId: number) {
+    currentGroupId.value = groupId
+    uni.setStorageSync('xc:currentGroupId', groupId)
+    refreshAll()
+  }
+
+  /** 切换身份后全局刷新所有数据 */
+  function refreshAll() {
+    const statsStore = useStatsStore()
+    const budgetStore = useBudgetStore()
+    const txStore = useTransactionStore()
+    statsStore.fetchOverview()
+    budgetStore.fetchBudget()
+    txStore.fetchTransactions({ page: 1 })
+  }
+
+  /** 获取群组列表 */
+  async function fetchGroups() {
+    loading.value = true
+    try {
+      groups.value = await api.getGroups()
+    } catch {
+      groups.value = []
+    } finally {
+      loading.value = false
+    }
+
+    // 验证 currentGroupId 是否仍有效（群组可能已被解散或退出）
+    if (currentGroupId.value !== null) {
+      const stillValid = groups.value.some(g => g.id === currentGroupId.value)
+      if (!stillValid) {
+        switchToPersonal()
+      }
+    }
+  }
+
+  /** 创建群组 */
+  async function createGroup(name: string) {
+    const result = await api.createGroup({ name })
+    await fetchGroups()
+    return result
+  }
+
+  /** 加入群组 */
+  async function joinGroup(inviteCode: string) {
+    const result = await api.joinGroup(inviteCode)
+    await fetchGroups()
+    return result
+  }
+
+  /** 退出群组 */
+  async function leaveGroup(groupId: number) {
+    await api.leaveGroup(groupId)
+    if (currentGroupId.value === groupId) {
+      switchToPersonal()
+    }
+    await fetchGroups()
+  }
+
+  /** 解散群组 */
+  async function deleteGroup(groupId: number) {
+    await api.deleteGroup(groupId)
+    if (currentGroupId.value === groupId) {
+      switchToPersonal()
+    }
+    await fetchGroups()
+  }
+
+  /** 初始化：从本地存储恢复选中状态 */
+  function init() {
+    const saved = uni.getStorageSync('xc:currentGroupId')
+    if (saved) {
+      currentGroupId.value = saved
+    }
+  }
+
+  return {
+    groups, loading, currentGroupId, currentGroup, isGroupMode,
+    switchToPersonal, switchToGroup, refreshAll,
+    fetchGroups, createGroup, joinGroup, leaveGroup, deleteGroup, init
+  }
+})
diff --git a/client/src/stores/stats.ts b/client/src/stores/stats.ts
index f1d337a..d99d6cc 100644
--- a/client/src/stores/stats.ts
+++ b/client/src/stores/stats.ts
@@ -2,6 +2,7 @@ import { defineStore } from 'pinia'
 import { ref } from 'vue'
 import * as api from '@/api/stats'
 import { getCurrentMonth } from '@/utils/format'
+import { useGroupStore } from '@/stores/group'
 
 // 重新导出类型以保持向后兼容
 export type Overview = api.Overview
@@ -15,8 +16,11 @@ export const useStatsStore = defineStore('stats', () => {
 
   async function fetchOverview(month?: string) {
     try {
-      const data = await api.getOverview({ month: month || getCurrentMonth() })
-      // 确保数据字段是数字类型
+      const groupStore = useGroupStore()
+      const data = await api.getOverview({
+        month: month || getCurrentMonth(),
+        group_id: groupStore.currentGroupId
+      })
       overview.value = {
         expense: Number(data?.expense) || 0,
         income: Number(data?.income) || 0,
@@ -30,8 +34,8 @@ export const useStatsStore = defineStore('stats', () => {
 
   async function fetchCategoryStats(month?: string, type: string = 'expense') {
     try {
-      const data = await api.getCategoryStats(month || getCurrentMonth(), type)
-      // 确保返回的是数组，且金额是数字
+      const groupStore = useGroupStore()
+      const data = await api.getCategoryStats(month || getCurrentMonth(), type, groupStore.currentGroupId)
       categoryStats.value = Array.isArray(data) ? data.map(item => ({
         ...item,
         amount: Number(item.amount) || 0,
@@ -44,8 +48,8 @@ export const useStatsStore = defineStore('stats', () => {
 
   async function fetchTrend(month?: string, type: string = 'expense') {
     try {
-      const data = await api.getTrend(month || getCurrentMonth(), type)
-      // 确保返回的是数组，且金额是数字
+      const groupStore = useGroupStore()
+      const data = await api.getTrend(month || getCurrentMonth(), type, groupStore.currentGroupId)
       trendData.value = Array.isArray(data) ? data.map(item => ({
         ...item,
         amount: Number(item.amount) || 0
diff --git a/client/src/stores/transaction.ts b/client/src/stores/transaction.ts
index 3b2dc52..d209c4c 100644
--- a/client/src/stores/transaction.ts
+++ b/client/src/stores/transaction.ts
@@ -1,6 +1,7 @@
 import { defineStore } from 'pinia'
 import { ref } from 'vue'
 import * as api from '@/api/transaction'
+import { useGroupStore } from '@/stores/group'
 
 export const useTransactionStore = defineStore('transaction', () => {
   const transactions = ref<api.Transaction[]>([])
@@ -11,7 +12,12 @@ export const useTransactionStore = defineStore('transaction', () => {
   async function fetchTransactions(params?: api.TransactionParams) {
     loading.value = true
     try {
-      const data = await api.getTransactions({ page: 1, ...params })
+      const groupStore = useGroupStore()
+      const data = await api.getTransactions({
+        page: 1,
+        ...params,
+        group_id: groupStore.currentGroupId
+      })
       transactions.value = data.list
       total.value = data.total
       currentPage.value = data.page
@@ -30,7 +36,11 @@ export const useTransactionStore = defineStore('transaction', () => {
     note?: string
     date: string
   }) {
-    const result = await api.createTransaction(data)
+    const groupStore = useGroupStore()
+    const result = await api.createTransaction({
+      ...data,
+      group_id: groupStore.currentGroupId
+    })
     return result.id
   }
 
diff --git a/client/src/stores/user.ts b/client/src/stores/user.ts
new file mode 100644
index 0000000..c55492c
--- /dev/null
+++ b/client/src/stores/user.ts
@@ -0,0 +1,52 @@
+import { defineStore } from 'pinia'
+import { ref, computed } from 'vue'
+import * as api from '@/api/user'
+import { API_BASE } from '@/config'
+
+export const useUserStore = defineStore('user', () => {
+  const userInfo = ref<api.UserInfo | null>(null)
+  const loading = ref(false)
+
+  const nickname = computed(() => {
+    return userInfo.value?.nickname || uni.getStorageSync('xc:nickname') || '小菜'
+  })
+
+  const avatarUrl = computed(() => {
+    const filename = userInfo.value?.avatar_url || uni.getStorageSync('xc:avatar_url') || ''
+    if (!filename) return ''
+    // 已是完整 URL（http/blob）直接返回
+    if (filename.startsWith('http') || filename.startsWith('blob:')) return filename
+    // 拼接：API_BASE + /user/avatar/ + 文件名
+    return `${API_BASE}/user/avatar/${filename}`
+  })
+
+  async function fetchUserInfo() {
+    loading.value = true
+    try {
+      userInfo.value = await api.getUserInfo()
+      if (userInfo.value) {
+        uni.setStorageSync('xc:nickname', userInfo.value.nickname)
+        uni.setStorageSync('xc:avatar_url', userInfo.value.avatar_url)
+      }
+    } catch (e) {
+      console.error('[UserStore] fetchUserInfo error:', e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  async function updateProfile(nickname: string) {
+    await api.updateNickname(nickname)
+    if (userInfo.value) userInfo.value.nickname = nickname
+    uni.setStorageSync('xc:nickname', nickname)
+  }
+
+  async function uploadAvatar(filePath: string) {
+    const result = await api.uploadAvatar(filePath)
+    if (userInfo.value) userInfo.value.avatar_url = result.avatar_url
+    uni.setStorageSync('xc:avatar_url', result.avatar_url)
+    return avatarUrl.value
+  }
+
+  return { userInfo, loading, nickname, avatarUrl, fetchUserInfo, updateProfile, uploadAvatar }
+})
diff --git a/client/src/utils/app-ready.ts b/client/src/utils/app-ready.ts
new file mode 100644
index 0000000..f5236e6
--- /dev/null
+++ b/client/src/utils/app-ready.ts
@@ -0,0 +1,20 @@
+/**
+ * App 启动就绪状态
+ *
+ * App.vue onLaunch 中调用 markReady()
+ * 页面 onMounted 中调用 waitForReady() 等待登录完成
+ */
+
+let _resolve: () => void
+const _ready = new Promise<void>(resolve => { _resolve = resolve })
+
+/** 标记 App 启动完成（登录成功） */
+export function markReady() { _resolve() }
+
+/** 等待 App 就绪，最多等 3 秒超时 */
+export function waitForReady(): Promise<void> {
+  return Promise.race([
+    _ready,
+    new Promise<void>(resolve => setTimeout(resolve, 3000))
+  ])
+}
diff --git a/client/src/utils/request.ts b/client/src/utils/request.ts
index 148f5bc..0c76bdb 100644
--- a/client/src/utils/request.ts
+++ b/client/src/utils/request.ts
@@ -1,5 +1,4 @@
-// API 基础地址
-const BASE_URL = 'https://xiaocai.j35.site/api'
+import { API_BASE } from '@/config'
 
 interface RequestOptions {
   url: string
@@ -7,13 +6,49 @@ interface RequestOptions {
   data?: any
 }
 
+interface LoginResult {
+  token: string
+  userId: number
+  nickname: string
+  avatar_url: string
+}
+
 let isRedirectingToLogin = false
+/** 重登录期间挂起的请求，登录成功后统一重试 */
+let pendingRetries: Array<{ resolve: (v: any) => void; reject: (e: any) => void; options: RequestOptions }> = []
+
+/** 保存登录结果到本地存储 */
+export function saveLoginResult(data: LoginResult) {
+  uni.setStorageSync('xc:token', data.token)
+  uni.setStorageSync('xc:userId', data.userId)
+  uni.setStorageSync('xc:nickname', data.nickname)
+  uni.setStorageSync('xc:avatar_url', data.avatar_url)
+}
+
+/** 执行重登录 */
+async function reLogin(): Promise<void> {
+  // H5 环境：demo 登录
+  if (typeof window !== 'undefined') {
+    const data = await request<LoginResult>({ url: '/auth/demo-login', method: 'POST' })
+    saveLoginResult(data)
+    return
+  }
+
+  // 小程序环境：wx.login
+  const loginRes = await new Promise<UniApp.LoginRes>((resolve, reject) => {
+    uni.login({ provider: 'weixin', success: resolve, fail: reject })
+  })
+  if (!loginRes.code) throw new Error('wx.login failed')
+
+  const data = await request<LoginResult>({ url: '/auth/login', method: 'POST', data: { code: loginRes.code } })
+  saveLoginResult(data)
+}
 
 export function request<T = any>(options: RequestOptions): Promise<T> {
   return new Promise((resolve, reject) => {
     const token = uni.getStorageSync('xc:token')
     uni.request({
-      url: BASE_URL + options.url,
+      url: API_BASE + options.url,
       method: options.method || 'GET',
       data: options.data,
       header: {
@@ -23,45 +58,36 @@ export function request<T = any>(options: RequestOptions): Promise<T> {
       success: (res: any) => {
         const { statusCode, data } = res
 
-        // HTTP 401 - token invalid or expired
         if (statusCode === 401) {
           uni.removeStorageSync('xc:token')
           uni.removeStorageSync('xc:userId')
+
+          // 加入重试队列
+          pendingRetries.push({ resolve, reject, options })
+
           if (!isRedirectingToLogin) {
             isRedirectingToLogin = true
-            // H5 环境自动获取 demo token 并重试
-            if (typeof window !== 'undefined') {
-              request<{ token: string; userId: number }>({
-                url: '/auth/demo-login',
-                method: 'POST'
-              }).then((data) => {
-                uni.setStorageSync('xc:token', data.token)
-                uni.setStorageSync('xc:userId', data.userId)
-                // 重试原请求
-                request(options).then(resolve).catch(reject)
-              }).catch(() => {
+            const retries = [...pendingRetries]
+            pendingRetries = []
+
+            reLogin()
+              .then(() => retries.forEach(r => request(r.options).then(r.resolve).catch(r.reject)))
+              .catch(() => {
                 uni.showToast({ title: '登录失败，请刷新页面', icon: 'none' })
-                reject({ code: 40100, message: '未登录' })
-              }).finally(() => { isRedirectingToLogin = false })
-            } else {
-              // 小程序环境自动重新登录
-              reLogin().then(() => {
-                request(options).then(resolve).catch(reject)
-              }).catch(() => {
-                reject({ code: 40100, message: '未登录' })
-              }).finally(() => { isRedirectingToLogin = false })
-            }
-          } else {
-            reject({ code: 40100, message: '未登录' })
+                retries.forEach(r => r.reject({ code: 40100, message: '未登录' }))
+              })
+              .finally(() => { isRedirectingToLogin = false })
           }
           return
         }
 
-        // Business logic success
         if (data.code === 0) {
           resolve(data.data)
         } else {
-          uni.showToast({ title: data.message || '请求失败', icon: 'none' })
+          // "用户不存在" 不弹 toast（首次登录竞态）
+          if (data.code !== 40400 || data.message !== '用户不存在') {
+            uni.showToast({ title: data.message || '请求失败', icon: 'none' })
+          }
           reject(data)
         }
       },
@@ -72,40 +98,3 @@ export function request<T = any>(options: RequestOptions): Promise<T> {
     })
   })
 }
-
-// 微信小程序自动重新登录
-function reLogin(): Promise<void> {
-  return new Promise((resolve, reject) => {
-    // #ifdef MP-WEIXIN
-    uni.login({
-      provider: 'weixin',
-      success: async (loginRes) => {
-        if (loginRes.code) {
-          try {
-            const data = await request<{ token: string; userId: number }>({
-              url: '/auth/login',
-              method: 'POST',
-              data: { code: loginRes.code }
-            })
-            uni.setStorageSync('xc:token', data.token)
-            uni.setStorageSync('xc:userId', data.userId)
-            resolve()
-          } catch (e) {
-            console.error('[Auth] Re-login failed:', e)
-            reject(e)
-          }
-        } else {
-          reject(new Error('wx.login failed'))
-        }
-      },
-      fail: (err) => {
-        console.error('[Auth] wx.login failed:', err)
-        reject(err)
-      }
-    })
-    // #endif
-    // #ifndef MP-WEIXIN
-    resolve()
-    // #endif
-  })
-}
diff --git a/client/src/utils/system.ts b/client/src/utils/system.ts
index c90023a..045ab61 100644
--- a/client/src/utils/system.ts
+++ b/client/src/utils/system.ts
@@ -1,10 +1,18 @@
 let statusBarHeight = 0
+/** 胶囊按钮右侧到屏幕右边的距离（含边距） */
+let capsuleRight = 0
 
 try {
   const info = uni.getSystemInfoSync()
   statusBarHeight = info.statusBarHeight || 0
+
+  // 小程序环境：获取胶囊位置
+  const menuRect = (uni as any).getMenuButtonBoundingClientRect?.()
+  if (menuRect) {
+    capsuleRight = info.screenWidth - menuRect.left + 8
+  }
 } catch {
   statusBarHeight = 20
 }
 
-export { statusBarHeight }
+export { statusBarHeight, capsuleRight }
diff --git a/docs/superpowers/plans/2026-06-03-user-profile-and-group-accounting.md b/docs/superpowers/plans/2026-06-03-user-profile-and-group-accounting.md
new file mode 100644
index 0000000..3e6a431
--- /dev/null
+++ b/docs/superpowers/plans/2026-06-03-user-profile-and-group-accounting.md
@@ -0,0 +1,589 @@
+# 用户信息完善 & 一起记功能 实现计划
+
+> **For agentic workers:** REQUIRED SUB-SKILL: Use superpowers:subagent-driven-development (recommended) or superpowers:executing-plans to implement this plan task-by-task. Steps use checkbox (`- [ ]`) syntax for tracking.
+
+**Goal:** 两个功能：① 用户可编辑昵称和上传头像，替换全局硬编码的"小菜"；② 用户可创建/加入群组，在「我的」页切换身份，群组仅作为数据聚合视图。
+
+**Architecture:**
+- 用户信息：扩展 `users` 表 → 服务端 multer 上传头像 → `/api/user` 路由 → 前端 `userStore` + 编辑页
+- 一起记：新建 `groups`/`group_members` 表 → `transactions` 加 `group_id` 标签 → 「我的」页身份切换 → 群组仅做数据聚合
+
+**Tech Stack:** Vue 3 Composition API (uni-app), Express + mysql2 + multer, SCSS Claymorphism
+
+---
+
+## 一、核心数据模型
+
+### 所有权 vs 聚合
+
+```
+transactions 表：
+  user_id   = 谁记的（数据所有权，永远不变）
+  group_id  = 群组标签（仅用于聚合视图，可变）
+```
+
+**个人视图：** `WHERE user_id = 我`
+- 看到我的**所有记录**，不管 group_id 是什么
+- 记录始终属于我
+
+**群组视图：** `WHERE group_id = X AND user_id IN (当前成员)`
+- 只看到当前成员在该群组下记的记录
+- 离开的成员的记录自动消失
+
+**加入群组：** 新记的账可选择记到群组（group_id = X），仅自己可见的旧记录不动
+
+**退出群组：** 该用户所有 `group_id = X` 的记录，`group_id` 设为 NULL
+- 记录回到个人视图
+- 群组其他人看不到
+
+**解散群组：** CASCADE 删除 groups → group_members 自动清理，transactions.group_id 设为 NULL
+
+### 举例
+
+```
+用户 A 创建群组 G，用户 B 加入
+
+A 在群组模式下记了午餐 ¥30：
+  → { user_id: A, group_id: G, amount: 3000 }
+
+B 在群组模式下记了打车 ¥20：
+  → { user_id: B, group_id: G, amount: 2000 }
+
+A 的个人视图：看到自己所有记录（包括这笔 ¥30）
+B 的个人视图：看到自己所有记录（包括这笔 ¥20）
+群组 G 视图：  A 和 B 都看到 ¥30 + ¥20 = ¥50
+
+B 退出群组：
+  → B 的记录 group_id 设为 NULL
+  → B 的个人视图：仍然看到 ¥20（记录属于 B）
+  → A 看群组 G：只看到 ¥30（B 的记录已不在）
+```
+
+---
+
+## 二、数据库设计
+
+### 现有表（不变）
+
+```
+users(id, openid, session_key, created_at, updated_at)
+categories(id, user_id, name, icon, color, type, sort_order, is_custom, created_at)
+transactions(id, user_id, amount, type, category_id, note, date, created_at, updated_at)
+budgets(id, user_id, amount, month, created_at, updated_at)
+```
+
+### 变更
+
+```
+users 表新增：
+  nickname    VARCHAR(50)   DEFAULT '小菜'
+  avatar_url  VARCHAR(500)  DEFAULT ''       -- 服务端相对路径
+
+新建 groups 表：
+  id           INT AUTO_INCREMENT PK
+  name         VARCHAR(100)  NOT NULL
+  invite_code  VARCHAR(10)   UNIQUE NOT NULL  -- 6位邀请码
+  created_by   INT           NOT NULL FK→users.id
+  created_at   TIMESTAMP
+  updated_at   TIMESTAMP
+
+新建 group_members 表：
+  id         INT AUTO_INCREMENT PK
+  group_id   INT NOT NULL FK→groups.id ON DELETE CASCADE
+  user_id    INT NOT NULL FK→users.id ON DELETE CASCADE
+  role       ENUM('owner','member') DEFAULT 'member'
+  nickname   VARCHAR(50) DEFAULT ''   -- 群内昵称（预留）
+  created_at TIMESTAMP
+  UNIQUE KEY (group_id, user_id)
+
+transactions 表新增：
+  group_id  INT DEFAULT NULL           -- 群组标签，NULL=纯个人记录
+  INDEX idx_group_date (group_id, date)
+  -- 注意：不要 FK ON DELETE CASCADE，因为退出群组时需要保留记录
+```
+
+---
+
+## 三、API 设计
+
+### 新增接口
+
+| 方法 | 路径 | 说明 |
+|------|------|------|
+| GET | `/api/user/me` | 获取当前用户信息 |
+| PUT | `/api/user/me` | 更新昵称 |
+| POST | `/api/user/avatar` | 上传头像 |
+| POST | `/api/groups` | 创建群组 |
+| GET | `/api/groups` | 获取用户的群组列表 |
+| GET | `/api/groups/:id` | 获取群组详情+成员 |
+| POST | `/api/groups/join` | 通过邀请码加入群组 |
+| POST | `/api/groups/:id/leave` | 退出群组（清除该用户的 group_id 标记） |
+| DELETE | `/api/groups/:id` | 解散群组（仅 owner） |
+
+### 变更接口
+
+**交易接口（`/api/transactions`）：**
+
+| 参数 | 说明 |
+|------|------|
+| `group_id` 不传 | 个人视图：`WHERE user_id = ?`（所有记录） |
+| `group_id = 数字` | 群组视图：`WHERE group_id = ? AND user_id IN (当前成员)` |
+
+**统计接口（`/api/stats`）：** 同上逻辑
+
+**退出群组（`POST /api/groups/:id/leave`）关键逻辑：**
+```sql
+-- 1. 清除该用户在该群组的记录标签
+UPDATE transactions SET group_id = NULL WHERE user_id = ? AND group_id = ?
+-- 2. 删除成员关系
+DELETE FROM group_members WHERE group_id = ? AND user_id = ?
+```
+
+---
+
+## 四、前端架构
+
+### 新增文件
+
+```
+client/src/
+├── api/user.ts              -- 用户信息 API（含头像上传）
+├── api/group.ts             -- 群组 API
+├── stores/user.ts           -- 用户信息 Store
+├── stores/group.ts          -- 群组 Store（身份切换状态）
+├── pages/profile-edit/index.vue   -- 编辑资料页
+└── pages/group-manage/index.vue   -- 群组管理页（创建/加入/列表/退出/解散）
+```
+
+### 修改文件
+
+```
+server/src/
+├── db/schema.sql, db/init.ts     -- 迁移
+├── index.ts                       -- 注册路由 + 静态文件
+├── routes/auth.ts                 -- 登录返回用户信息
+├── routes/user.ts                 -- [新建]
+├── routes/group.ts               -- [新建]
+├── routes/transaction.ts         -- 查询逻辑改造
+└── routes/stats.ts               -- 统计逻辑改造
+
+client/src/
+├── api/auth.ts, api/transaction.ts, api/stats.ts  -- 类型扩展
+├── stores/transaction.ts, stores/stats.ts          -- 自动传 group_id
+├── App.vue                     -- 初始化
+├── pages.json                  -- 注册页面
+├── pages/index/index.vue       -- 显示真实昵称
+└── pages/profile/index.vue     -- 身份切换 + 头像/昵称
+```
+
+### 身份切换交互（「我的」页）
+
+```
+┌─────────────────────────┐
+│  profile-card (点击编辑)  │
+│  [头像] 昵称 >           │
+├─────────────────────────┤
+│  identity-card (点击切换) │
+│  👤 个人账本  仅自己 >   │
+├─────────────────────────┤
+│  quick-stats             │
+│  menu-card               │
+└─────────────────────────┘
+
+点击 identity-card → 底部弹出 ActionSheet：
+┌─────────────────────────┐
+│       切换账本           │
+│  ✓ 个人账本              │
+│    家庭账本  3人          │
+│    情侣账本  2人          │
+│  ─────────────────────  │
+│  ＋ 创建群组             │
+│  ＋ 加入群组             │
+└─────────────────────────┘
+```
+
+**创建群组流程：**
+1. 点击「创建群组」→ 弹出输入框输入名称 → 确认
+2. 创建成功 → 显示邀请码 → 自动复制到剪贴板
+3. 群组自动出现在身份列表中
+
+**加入群组流程：**
+1. 点击「加入群组」→ 弹出输入框输入邀请码 → 确认
+2. 加入成功 → 群组自动出现在身份列表中
+
+**退出/解散（群组管理页）：**
+- 点击群组卡片进入详情 → 显示成员列表、邀请码
+- 成员可见「退出群组」按钮
+- 群主可见「解散群组」按钮
+
+---
+
+## 五、任务清单
+
+### Part 1: 用户信息完善（Task 1-7）
+
+#### Task 1: 数据库 — users 表扩展
+
+**Files:** `server/src/db/schema.sql`, `server/src/db/init.ts`
+
+- [ ] **Step 1: 更新 schema.sql users 表**
+
+```sql
+CREATE TABLE IF NOT EXISTS users (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  openid VARCHAR(100) UNIQUE,
+  session_key VARCHAR(100),
+  nickname VARCHAR(50) DEFAULT '小菜' COMMENT '用户昵称',
+  avatar_url VARCHAR(500) DEFAULT '' COMMENT '头像URL',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+```
+
+- [ ] **Step 2: init.ts runMigrations 添加迁移**
+
+```typescript
+const hasNickname = await columnExists(conn, 'users', 'nickname')
+if (!hasNickname) {
+  await conn.query("ALTER TABLE users ADD COLUMN nickname VARCHAR(50) DEFAULT '小菜'")
+}
+const hasAvatarUrl = await columnExists(conn, 'users', 'avatar_url')
+if (!hasAvatarUrl) {
+  await conn.query("ALTER TABLE users ADD COLUMN avatar_url VARCHAR(500) DEFAULT ''")
+}
+```
+
+- [ ] **Step 3: 验证** `cd server && npm run db:init`
+- [ ] **Step 4: Commit** `feat: users 表添加 nickname、avatar_url`
+
+---
+
+#### Task 2: 用户信息 API + 头像上传
+
+**Files:** Create `server/src/routes/user.ts`, Modify `server/src/index.ts`
+
+- [ ] **Step 1: 安装 multer** `cd server && npm install multer && npm install -D @types/multer`
+
+- [ ] **Step 2: 创建 user 路由**
+
+三个接口：
+- `GET /me` — 查询用户信息
+- `PUT /me` — 更新昵称（验证非空、≤50字符）
+- `POST /avatar` — multer 接收 `file` 字段，存到 `uploads/avatars/`，更新 `users.avatar_url`，删除旧文件
+
+- [ ] **Step 3: index.ts 注册路由 + 静态文件**
+
+```typescript
+import userRoutes from './routes/user'
+import path from 'path'
+
+app.use('/uploads', express.static(path.join(__dirname, '../uploads')))
+app.use('/api/user', apiLimiter, userRoutes)
+```
+
+- [ ] **Step 4: Commit** `feat: 用户信息 API + 头像上传`
+
+---
+
+#### Task 3: 登录返回用户信息
+
+**Files:** `server/src/routes/auth.ts`, `client/src/api/auth.ts`, `client/src/App.vue`
+
+- [ ] **Step 1: auth.ts 两个登录路由返回 `nickname`, `avatar_url`**
+- [ ] **Step 2: auth.ts LoginResult 类型扩展**
+- [ ] **Step 3: App.vue 登录后存储 `xc:nickname`, `xc:avatar_url`**
+- [ ] **Step 4: Commit** `feat: 登录返回用户信息`
+
+---
+
+#### Task 4: 用户信息 Store
+
+**Files:** Create `client/src/api/user.ts`, Create `client/src/stores/user.ts`
+
+- [ ] **Step 1: api/user.ts** — `getUserInfo`, `updateNickname`, `uploadAvatar`（用 `uni.uploadFile`）
+- [ ] **Step 2: stores/user.ts** — `nickname`, `avatarUrl` computed，`fetchUserInfo`, `updateProfile`, `uploadAvatar`
+- [ ] **Step 3: Commit** `feat: 用户信息 Store`
+
+---
+
+#### Task 5: 个人资料编辑页面
+
+**Files:** Create `client/src/pages/profile-edit/index.vue`, Modify `client/src/pages.json`
+
+- [ ] **Step 1: pages.json 注册页面**
+- [ ] **Step 2: 创建编辑页** — 头像点击选择+上传，昵称输入框，保存按钮
+- [ ] **Step 3: Commit** `feat: 个人资料编辑页面`
+
+---
+
+#### Task 6: 「我的」页面显示真实用户信息
+
+**Files:** `client/src/pages/profile/index.vue`
+
+- [ ] **Step 1: 引入 userStore，替换硬编码头像和昵称**
+- [ ] **Step 2: 点击 profile-card 跳转编辑页**
+- [ ] **Step 3: Commit** `feat: 我的页面显示真实头像和昵称`
+
+---
+
+#### Task 7: 首页显示真实昵称
+
+**Files:** `client/src/pages/index/index.vue`
+
+- [ ] **Step 1: 引入 userStore，替换 `小菜` 为 `userStore.nickname`**
+- [ ] **Step 2: Commit** `feat: 首页问候语显示真实昵称`
+
+---
+
+### Part 2: 一起记功能（Task 8-14）
+
+#### Task 8: 数据库 — 群组表
+
+**Files:** `server/src/db/schema.sql`, `server/src/db/init.ts`
+
+- [ ] **Step 1: schema.sql 添加 groups, group_members 表，transactions 添加 group_id**
+
+注意：`transactions.group_id` **不加外键约束**，因为退出群组时需要保留记录（group_id 设为 NULL）。
+
+- [ ] **Step 2: init.ts runMigrations 添加群组迁移**
+
+```typescript
+const hasGroupId = await columnExists(conn, 'transactions', 'group_id')
+if (!hasGroupId) {
+  // 创建 groups 表
+  // 创建 group_members 表
+  // ALTER TABLE transactions ADD COLUMN group_id INT DEFAULT NULL
+  // ALTER TABLE transactions ADD INDEX idx_group_date (group_id, date)
+}
+```
+
+- [ ] **Step 3: 验证** `cd server && npm run db:init`
+- [ ] **Step 4: Commit** `feat: 群组表创建，transactions 添加 group_id`
+
+---
+
+#### Task 9: 群组 API
+
+**Files:** Create `server/src/routes/group.ts`, Modify `server/src/index.ts`
+
+- [ ] **Step 1: 创建 group 路由**
+
+| 接口 | 关键逻辑 |
+|------|---------|
+| `POST /` | 生成邀请码，事务插入 groups + group_members(role=owner) |
+| `GET /` | JOIN group_members，含 member_count |
+| `GET /:id` | 验证成员身份，返回群组信息 + 成员列表（含 nickname, avatar_url） |
+| `POST /join` | 验证邀请码，检查非成员，插入 group_members(role=member) |
+| `POST /:id/leave` | **关键：先 `UPDATE transactions SET group_id = NULL WHERE user_id = ? AND group_id = ?`，再 `DELETE FROM group_members`** |
+| `DELETE /:id` | 仅 owner，`DELETE FROM groups`（CASCADE 清理 members，transactions.group_id 因无外键需手动清理） |
+
+**解散群组时手动清理 transactions：**
+```sql
+UPDATE transactions SET group_id = NULL WHERE group_id = ?
+DELETE FROM groups WHERE id = ?
+```
+
+- [ ] **Step 2: index.ts 注册路由**
+- [ ] **Step 3: Commit** `feat: 群组 API`
+
+---
+
+#### Task 10: 交易和统计 API 支持群组视图
+
+**Files:** `server/src/routes/transaction.ts`, `server/src/routes/stats.ts`
+
+**核心改造：查询逻辑根据 `group_id` 参数切换视图模式。**
+
+- [ ] **Step 1: transaction.ts GET / 改造**
+
+```typescript
+const { group_id } = req.query
+
+if (group_id && group_id !== 'null') {
+  // 群组视图：群组下所有成员的记录
+  // 先验证当前用户是群组成员
+  const [memberCheck] = await pool.query(
+    'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+    [group_id, req.userId]
+  )
+  if ((memberCheck as any[]).length === 0) {
+    return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+  }
+  where = `WHERE t.group_id = ? AND t.user_id IN (SELECT user_id FROM group_members WHERE group_id = ?)`
+  params = [group_id, group_id]
+} else {
+  // 个人视图：我的所有记录（不管 group_id）
+  where = 'WHERE t.user_id = ?'
+  params = [req.userId]
+}
+```
+
+- [ ] **Step 2: transaction.ts POST / 改造**
+
+创建记录时接受可选 `group_id` 参数，写入数据库。
+
+- [ ] **Step 3: transaction.ts PUT/DELETE 改造**
+
+编辑/删除权限：只能操作自己 `user_id` 的记录（不管 group_id）。
+
+- [ ] **Step 4: stats.ts 三个路由改造**
+
+与 transaction 相同的视图切换逻辑。
+
+- [ ] **Step 5: Commit** `feat: 交易和统计 API 支持群组视图`
+
+---
+
+#### Task 11: 群组客户端 Store
+
+**Files:** Create `client/src/api/group.ts`, Create `client/src/stores/group.ts`, Modify `client/src/stores/transaction.ts`, Modify `client/src/stores/stats.ts`
+
+- [ ] **Step 1: api/group.ts** — 封装群组 API
+- [ ] **Step 2: stores/group.ts**
+
+```typescript
+// 核心状态
+const currentGroupId = ref<number | null>(null)  // null = 个人模式
+const isGroupMode = computed(() => currentGroupId.value !== null)
+
+// 切换方法
+function switchToPersonal() {
+  currentGroupId.value = null
+  uni.removeStorageSync('xc:currentGroupId')
+}
+function switchToGroup(id: number) {
+  currentGroupId.value = id
+  uni.setStorageSync('xc:currentGroupId', id)
+}
+```
+
+- [ ] **Step 3: 更新 transaction/stats Store**
+
+每个 fetch 方法自动读取 `useGroupStore().currentGroupId` 并传给 API。
+
+- [ ] **Step 4: Commit** `feat: 群组 Store + 数据层自动跟随`
+
+---
+
+#### Task 12: 「我的」页身份切换
+
+**Files:** `client/src/pages/profile/index.vue`
+
+- [ ] **Step 1: 在 profile-card 和 quick-stats 之间添加身份切换卡片**
+
+```vue
+<view class="identity-card" @tap="showIdentityPicker">
+  <Icon :name="groupStore.isGroupMode ? 'users' : 'user'" :size="32" color="#FF8C69" />
+  <view class="id-info">
+    <text class="id-name">{{ groupStore.isGroupMode ? groupStore.currentGroup?.name : '个人账本' }}</text>
+    <text class="id-desc">{{ groupStore.isGroupMode ? groupStore.currentGroup?.member_count + ' 人共享' : '仅自己可见' }}</text>
+  </view>
+  <Icon name="chevronRight" :size="24" color="#BFB3B3" />
+</view>
+```
+
+- [ ] **Step 2: 底部弹出身份选择面板**
+
+```vue
+<view class="identity-modal" v-if="showIdentity" @tap="showIdentity = false">
+  <view class="modal-content" @tap.stop>
+    <text class="modal-title">切换账本</text>
+
+    <!-- 个人账本 -->
+    <view class="id-option" :class="{ active: !groupStore.isGroupMode }" @tap="switchToPersonal">
+      <Icon name="user" :size="36" ... />
+      <text>个人账本</text>
+      <Icon v-if="!groupStore.isGroupMode" name="check" ... />
+    </view>
+
+    <!-- 群组列表 -->
+    <view v-for="g in groupStore.groups" ... @tap="switchToGroup(g.id)">
+      ...
+    </view>
+
+    <!-- 操作按钮 -->
+    <view class="id-actions">
+      <view @tap="promptCreateGroup">创建群组</view>
+      <view @tap="promptJoinGroup">加入群组</view>
+    </view>
+  </view>
+</view>
+```
+
+- [ ] **Step 3: 创建群组交互**
+
+点击「创建群组」→ `uni.showModal` 输入名称 → 调用 `groupStore.createGroup()` → 成功后 `uni.setClipboardData` 复制邀请码 + Toast
+
+- [ ] **Step 4: 加入群组交互**
+
+点击「加入群组」→ `uni.showModal` 输入邀请码 → 调用 `groupStore.joinGroup()` → 成功后 Toast
+
+- [ ] **Step 5: 切换后刷新数据**
+
+切换身份后调用 `refreshData()` 重新加载当前页的 stats 和 transactions。
+
+- [ ] **Step 6: Commit** `feat: 我的页身份切换`
+
+---
+
+#### Task 13: 群组管理页面
+
+**Files:** Create `client/src/pages/group-manage/index.vue`, Modify `client/src/pages.json`
+
+- [ ] **Step 1: pages.json 注册页面**
+- [ ] **Step 2: 创建群组管理页面**
+
+页面功能：
+- 群组列表（卡片形式，显示名称、人数、邀请码）
+- 点击邀请码可复制
+- 成员列表
+- 「退出群组」按钮（普通成员）— 二次确认："退出后你在该群组的记录将回到个人账本"
+- 「解散群组」按钮（群主）— 二次确认："所有群组记录将被清除"
+
+- [ ] **Step 3: Commit** `feat: 群组管理页面`
+
+---
+
+#### Task 14: App.vue 初始化 + 最终集成
+
+**Files:** `client/src/App.vue`, `client/src/pages/index/index.vue`
+
+- [ ] **Step 1: App.vue 初始化 groupStore**
+
+登录成功后 `groupStore.init()` + `groupStore.fetchGroups()`
+
+- [ ] **Step 2: 首页 fetchTodayData 传 group_id**
+
+```typescript
+const groupStore = useGroupStore()
+const data = await getOverview({ startDate: today, endDate: today, group_id: groupStore.currentGroupId })
+```
+
+- [ ] **Step 3: 验证完整流程**
+
+- [ ] **Step 4: Commit** `feat: 集成完成`
+
+---
+
+## 六、验证清单
+
+### 用户信息
+- [ ] 「我的」页显示真实头像和昵称
+- [ ] 点击头像区域跳转编辑页，可上传头像（存到服务端）、修改昵称
+- [ ] 保存后首页/我的页同步更新
+
+### 一起记 — 创建/加入
+- [ ] 身份切换面板中点击「创建群组」→ 输入名称 → 获得邀请码（自动复制）
+- [ ] 点击「加入群组」→ 输入邀请码 → 加入成功
+- [ ] 身份列表中出现新群组
+
+### 一起记 — 记账归属
+- [ ] 群组模式下记账 → 记录归属自己（user_id = 我），group_id = 群组
+- [ ] 个人视图：看到自己所有记录（含群组中记的）
+- [ ] 群组视图：看到所有成员在该群组下记的记录
+- [ ] 编辑/删除：只能操作自己记的记录
+
+### 一起记 — 退出/解散
+- [ ] 退出群组 → 自己的记录回到个人视图，群组看不到
+- [ ] 解散群组 → 群组消失，所有人的记录回到个人视图
+- [ ] 退出/解散后自动切回个人模式
diff --git a/server/.env.example b/server/.env.example
index 5dc97f7..a499d6c 100644
--- a/server/.env.example
+++ b/server/.env.example
@@ -13,6 +13,9 @@ DB_USER=your_mysql_user_here
 DB_PASSWORD=your_mysql_password_here
 DB_NAME=your_mysql_name_here
 
+# Uploads
+UPLOAD_DIR=./uploads
+
 # Backup
 BACKUP_DIR=/var/backups/xiaocai
 
diff --git a/server/package-lock.json b/server/package-lock.json
index eb9c075..ae8a135 100644
--- a/server/package-lock.json
+++ b/server/package-lock.json
@@ -12,11 +12,13 @@
         "dotenv": "^17.4.2",
         "express": "^4.18.2",
         "express-rate-limit": "^8.5.2",
+        "multer": "^2.1.1",
         "mysql2": "^3.9.0"
       },
       "devDependencies": {
         "@types/cors": "^2.8.17",
         "@types/express": "^4.17.21",
+        "@types/multer": "^2.1.0",
         "@types/node": "^20.11.0",
         "shx": "^0.4.0",
         "tsx": "^4.7.0",
@@ -574,6 +576,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/multer": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/@types/multer/-/multer-2.1.0.tgz",
+      "integrity": "sha512-zYZb0+nJhOHtPpGDb3vqPjwpdeGlGC157VpkqNQL+UU2qwoacoQ7MpsAmUptI/0Oa127X32JzWDqQVEXp2RcIA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@types/express": "*"
+      }
+    },
     "node_modules/@types/node": {
       "version": "20.19.41",
       "resolved": "https://registry.npmjs.org/@types/node/-/node-20.19.41.tgz",
@@ -643,6 +655,12 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/append-field": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz",
+      "integrity": "sha512-klpgFSWLW1ZEs8svjfb7g4qWY0YS5imI82dTg+QahUvJ8YqAY0P10Uk8tTyh9ZGuYEZEMaeJYCF5BFuX552hsw==",
+      "license": "MIT"
+    },
     "node_modules/array-flatten": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
@@ -695,6 +713,23 @@
         "node": ">=8"
       }
     },
+    "node_modules/buffer-from": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
+      "integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==",
+      "license": "MIT"
+    },
+    "node_modules/busboy": {
+      "version": "1.6.0",
+      "resolved": "https://registry.npmjs.org/busboy/-/busboy-1.6.0.tgz",
+      "integrity": "sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==",
+      "dependencies": {
+        "streamsearch": "^1.1.0"
+      },
+      "engines": {
+        "node": ">=10.16.0"
+      }
+    },
     "node_modules/bytes": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
@@ -733,6 +768,21 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/concat-stream": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-2.0.0.tgz",
+      "integrity": "sha512-MWufYdFw53ccGjCA+Ol7XJYpAlW6/prSMzuPOTRnJGcGzuhLn4Scrz7qf6o8bROZ514ltazcIFJZevcfbo0x7A==",
+      "engines": [
+        "node >= 6.0"
+      ],
+      "license": "MIT",
+      "dependencies": {
+        "buffer-from": "^1.0.0",
+        "inherits": "^2.0.3",
+        "readable-stream": "^3.0.2",
+        "typedarray": "^0.0.6"
+      }
+    },
     "node_modules/content-disposition": {
       "version": "0.5.4",
       "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@@ -1537,6 +1587,25 @@
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A==",
       "license": "MIT"
     },
+    "node_modules/multer": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/multer/-/multer-2.1.1.tgz",
+      "integrity": "sha512-mo+QTzKlx8R7E5ylSXxWzGoXoZbOsRMpyitcht8By2KHvMbf3tjwosZ/Mu/XYU6UuJ3VZnODIrak5ZrPiPyB6A==",
+      "license": "MIT",
+      "dependencies": {
+        "append-field": "^1.0.0",
+        "busboy": "^1.6.0",
+        "concat-stream": "^2.0.0",
+        "type-is": "^1.6.18"
+      },
+      "engines": {
+        "node": ">= 10.16.0"
+      },
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/express"
+      }
+    },
     "node_modules/mysql2": {
       "version": "3.22.4",
       "resolved": "https://registry.npmjs.org/mysql2/-/mysql2-3.22.4.tgz",
@@ -1798,6 +1867,20 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/readable-stream": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz",
+      "integrity": "sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==",
+      "license": "MIT",
+      "dependencies": {
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
+      },
+      "engines": {
+        "node": ">= 6"
+      }
+    },
     "node_modules/rechoir": {
       "version": "0.6.2",
       "resolved": "https://registry.npmjs.org/rechoir/-/rechoir-0.6.2.tgz",
@@ -2116,6 +2199,23 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/streamsearch": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-1.1.0.tgz",
+      "integrity": "sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==",
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
+    "node_modules/string_decoder": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz",
+      "integrity": "sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==",
+      "license": "MIT",
+      "dependencies": {
+        "safe-buffer": "~5.2.0"
+      }
+    },
     "node_modules/strip-eof": {
       "version": "1.0.0",
       "resolved": "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz",
@@ -2193,6 +2293,12 @@
         "node": ">= 0.6"
       }
     },
+    "node_modules/typedarray": {
+      "version": "0.0.6",
+      "resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
+      "integrity": "sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA==",
+      "license": "MIT"
+    },
     "node_modules/typescript": {
       "version": "5.9.3",
       "resolved": "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz",
@@ -2222,6 +2328,12 @@
         "node": ">= 0.8"
       }
     },
+    "node_modules/util-deprecate": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
+      "integrity": "sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==",
+      "license": "MIT"
+    },
     "node_modules/utils-merge": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
diff --git a/server/package.json b/server/package.json
index 3afae0e..f48270b 100644
--- a/server/package.json
+++ b/server/package.json
@@ -13,11 +13,13 @@
     "dotenv": "^17.4.2",
     "express": "^4.18.2",
     "express-rate-limit": "^8.5.2",
+    "multer": "^2.1.1",
     "mysql2": "^3.9.0"
   },
   "devDependencies": {
     "@types/cors": "^2.8.17",
     "@types/express": "^4.17.21",
+    "@types/multer": "^2.1.0",
     "@types/node": "^20.11.0",
     "shx": "^0.4.0",
     "tsx": "^4.7.0",
diff --git a/server/src/db/init.ts b/server/src/db/init.ts
index 27b4bf3..b92f35f 100644
--- a/server/src/db/init.ts
+++ b/server/src/db/init.ts
@@ -34,6 +34,55 @@ async function runMigrations(conn: mysql.Connection) {
     await conn.query('ALTER TABLE budgets ADD UNIQUE KEY uk_user_month (user_id, month)')
     console.log('[DB] budgets.user_id added')
   }
+
+  // users 表添加 nickname 和 avatar_url
+  const hasNickname = await columnExists(conn, 'users', 'nickname')
+  if (!hasNickname) {
+    console.log('[DB] Migrating: adding nickname to users')
+    await conn.query("ALTER TABLE users ADD COLUMN nickname VARCHAR(50) DEFAULT '小菜' COMMENT '用户昵称'")
+  }
+  const hasAvatarUrl = await columnExists(conn, 'users', 'avatar_url')
+  if (!hasAvatarUrl) {
+    console.log('[DB] Migrating: adding avatar_url to users')
+    await conn.query("ALTER TABLE users ADD COLUMN avatar_url VARCHAR(500) DEFAULT '' COMMENT '头像URL'")
+  }
+
+  // 群组表 + transactions.group_id
+  const hasGroupId = await columnExists(conn, 'transactions', 'group_id')
+  console.log(`[DB] transactions.group_id exists: ${hasGroupId}`)
+  if (!hasGroupId) {
+    console.log('[DB] Migrating: creating groups tables and adding group_id')
+
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS \`groups\` (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        name VARCHAR(100) NOT NULL,
+        invite_code VARCHAR(10) UNIQUE NOT NULL,
+        created_by INT NOT NULL,
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+        FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE CASCADE
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+
+    await conn.query(`
+      CREATE TABLE IF NOT EXISTS group_members (
+        id INT AUTO_INCREMENT PRIMARY KEY,
+        group_id INT NOT NULL,
+        user_id INT NOT NULL,
+        role ENUM('owner', 'member') DEFAULT 'member',
+        nickname VARCHAR(50) DEFAULT '',
+        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+        UNIQUE KEY uk_group_user (group_id, user_id),
+        FOREIGN KEY (group_id) REFERENCES \`groups\`(id) ON DELETE CASCADE,
+        FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+
+    await conn.query("ALTER TABLE transactions ADD COLUMN group_id INT DEFAULT NULL COMMENT '群组标签'")
+    await conn.query("ALTER TABLE transactions ADD INDEX idx_group_date (group_id, date)")
+    console.log('[DB] Groups migration complete')
+  }
 }
 
 export async function initDatabase() {
diff --git a/server/src/db/schema.sql b/server/src/db/schema.sql
index 16b5eb7..7847581 100644
--- a/server/src/db/schema.sql
+++ b/server/src/db/schema.sql
@@ -2,6 +2,8 @@ CREATE TABLE IF NOT EXISTS users (
   id INT AUTO_INCREMENT PRIMARY KEY,
   openid VARCHAR(100) UNIQUE,
   session_key VARCHAR(100),
+  nickname VARCHAR(50) DEFAULT '小菜' COMMENT '用户昵称',
+  avatar_url VARCHAR(500) DEFAULT '' COMMENT '头像URL',
   created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
@@ -28,10 +30,12 @@ CREATE TABLE IF NOT EXISTS transactions (
   category_id INT,
   note VARCHAR(200),
   date DATE NOT NULL,
+  group_id INT DEFAULT NULL COMMENT '群组标签，NULL=纯个人记录',
   created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
   updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
   INDEX idx_user_date (user_id, date),
   INDEX idx_user_type_date (user_id, type, date),
+  INDEX idx_group_date (group_id, date),
   FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE,
   FOREIGN KEY (category_id) REFERENCES categories(id) ON DELETE SET NULL
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
@@ -46,3 +50,25 @@ CREATE TABLE IF NOT EXISTS budgets (
   UNIQUE KEY uk_user_month (user_id, month),
   FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS `groups` (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  name VARCHAR(100) NOT NULL COMMENT '群组名称',
+  invite_code VARCHAR(10) UNIQUE NOT NULL COMMENT '邀请码',
+  created_by INT NOT NULL COMMENT '创建者',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  updated_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
+  FOREIGN KEY (created_by) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
+
+CREATE TABLE IF NOT EXISTS group_members (
+  id INT AUTO_INCREMENT PRIMARY KEY,
+  group_id INT NOT NULL,
+  user_id INT NOT NULL,
+  role ENUM('owner', 'member') DEFAULT 'member' COMMENT '角色',
+  nickname VARCHAR(50) DEFAULT '' COMMENT '群内昵称',
+  created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+  UNIQUE KEY uk_group_user (group_id, user_id),
+  FOREIGN KEY (group_id) REFERENCES `groups`(id) ON DELETE CASCADE,
+  FOREIGN KEY (user_id) REFERENCES users(id) ON DELETE CASCADE
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/server/src/index.ts b/server/src/index.ts
index 6848458..7b4d95b 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -2,6 +2,8 @@ import 'dotenv/config'
 import express from 'express'
 import cors from 'cors'
 import rateLimit from 'express-rate-limit'
+import path from 'path'
+import fs from 'fs'
 import { authMiddleware } from './middleware/auth'
 import { initDatabase } from './db/init'
 import pool from './db/connection'
@@ -11,6 +13,8 @@ import statsRoutes from './routes/stats'
 import budgetRoutes from './routes/budget'
 import categoryRoutes from './routes/category'
 import backupRoutes from './routes/backup'
+import userRoutes from './routes/user'
+import groupRoutes from './routes/group'
 import { backupDatabase } from './utils/backup'
 
 // Warn if token secret is using default fallback
@@ -22,6 +26,9 @@ const app = express()
 const PORT = process.env.PORT || 3000
 const ALLOWED_ORIGINS = (process.env.CORS_ORIGINS || '').split(',').filter(Boolean)
 
+// 反向代理环境下信任 X-Forwarded-* 头（修复 rate-limit 警告）
+app.set('trust proxy', 1)
+
 app.use(cors({
   origin: (origin, callback) => {
     // No origin = WeChat mini-program request (always allow)
@@ -54,6 +61,42 @@ const apiLimiter = rateLimit({
   legacyHeaders: false,
 })
 
+// 头像 API（公开，不经过 auth 中间件）
+app.get('/api/user/avatar/:filename', async (req, res) => {
+  try {
+    const uploadDir = path.resolve(process.env.UPLOAD_DIR || './uploads')
+    const avatarDir = path.join(uploadDir, 'avatars')
+    const filename = path.basename(req.params.filename)
+
+    // 文件名格式校验：仅允许 数字_数字.ext
+    if (!/^\d+_\d+\.(jpg|jpeg|png|webp)$/i.test(filename)) {
+      return res.status(400).json({ code: 40001, message: '无效文件名' })
+    }
+
+    const filepath = path.join(avatarDir, filename)
+
+    // 路径穿越检查：确保解析后仍在 avatarDir 内
+    if (!path.resolve(filepath).startsWith(path.resolve(avatarDir))) {
+      return res.status(400).json({ code: 40001, message: '无效路径' })
+    }
+
+    if (!fs.existsSync(filepath)) {
+      return res.status(404).json({ code: 40400, message: '头像不存在' })
+    }
+
+    const ext = path.extname(filename).toLowerCase()
+    const mimeMap: Record<string, string> = {
+      '.jpg': 'image/jpeg', '.jpeg': 'image/jpeg',
+      '.png': 'image/png', '.webp': 'image/webp'
+    }
+    res.setHeader('Content-Type', mimeMap[ext] || 'application/octet-stream')
+    res.setHeader('Cache-Control', 'public, max-age=86400')
+    fs.createReadStream(filepath).pipe(res)
+  } catch {
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
 app.use(authMiddleware)
 
 app.use('/api/auth', authLimiter, authRoutes)
@@ -62,6 +105,8 @@ app.use('/api/stats', apiLimiter, statsRoutes)
 app.use('/api/budget', apiLimiter, budgetRoutes)
 app.use('/api/categories', apiLimiter, categoryRoutes)
 app.use('/api/backup', apiLimiter, backupRoutes)
+app.use('/api/user', apiLimiter, userRoutes)
+app.use('/api/groups', apiLimiter, groupRoutes)
 
 app.get('/api/health', async (_req, res) => {
   try {
@@ -74,19 +119,25 @@ app.get('/api/health', async (_req, res) => {
 
 let server: any
 
-initDatabase().then(async () => {
-  // 每次启动时自动备份数据库
-  try {
-    await backupDatabase()
-    console.log('[Backup] 启动备份完成')
-  } catch (err) {
-    console.error('[Backup] 启动备份失败:', err)
+// 生产环境：先备份再迁移，迁移出问题可恢复
+async function start() {
+  if (process.env.NODE_ENV === 'production') {
+    try {
+      await backupDatabase()
+      console.log('[Backup] 迁移前备份完成')
+    } catch (err) {
+      console.error('[Backup] 备份失败:', err)
+    }
   }
 
+  await initDatabase()
+
   server = app.listen(PORT, () => {
     console.log(`Server running on port ${PORT}`)
   })
-})
+}
+
+start()
 
 // Graceful shutdown
 function shutdown(signal: string) {
diff --git a/server/src/middleware/auth.ts b/server/src/middleware/auth.ts
index aba62ed..16ca5b9 100644
--- a/server/src/middleware/auth.ts
+++ b/server/src/middleware/auth.ts
@@ -1,5 +1,5 @@
 import { Request, Response, NextFunction } from 'express'
-import { createHmac } from 'crypto'
+import { createHmac, timingSafeEqual } from 'crypto'
 
 export interface AuthRequest extends Request {
   userId?: number
@@ -48,10 +48,12 @@ export function authMiddleware(req: AuthRequest, res: Response, next: NextFuncti
       return res.status(401).json({ code: 40100, message: 'token无效' })
     }
 
-    // Verify HMAC signature (full length)
+    // Verify HMAC signature (constant-time comparison)
     const payload = `${userId}:${timestamp}`
     const expectedSig = createHmac('sha256', TOKEN_SECRET).update(payload).digest('hex')
-    if (signature !== expectedSig) {
+    const sigBuf = Buffer.from(signature, 'hex')
+    const expectedBuf = Buffer.from(expectedSig, 'hex')
+    if (sigBuf.length !== expectedBuf.length || !timingSafeEqual(sigBuf, expectedBuf)) {
       return res.status(401).json({ code: 40100, message: 'token无效' })
     }
 
diff --git a/server/src/routes/auth.ts b/server/src/routes/auth.ts
index 8d56ab9..0f3a9fd 100644
--- a/server/src/routes/auth.ts
+++ b/server/src/routes/auth.ts
@@ -24,7 +24,9 @@ router.post('/demo-login', async (_req: Request, res: Response) => {
     )
     const userId = (result as any).insertId
     const token = signToken(userId)
-    res.json({ code: 0, data: { token, userId } })
+    const [userRows] = await pool.query('SELECT nickname, avatar_url FROM users WHERE id = ?', [userId])
+    const userInfo = (userRows as any[])[0]
+    res.json({ code: 0, data: { token, userId, nickname: userInfo?.nickname || '小菜', avatar_url: userInfo?.avatar_url || '' } })
   } catch (err: any) {
     console.error('[Auth] Demo login failed:', err.message)
     res.status(500).json({ code: 50000, message: '服务器错误' })
@@ -59,8 +61,9 @@ router.post('/login', async (req: Request, res: Response) => {
 
     // HMAC signed token with expiry
     const token = signToken(userId)
-
-    res.json({ code: 0, data: { token, userId } })
+    const [userRows] = await pool.query('SELECT nickname, avatar_url FROM users WHERE id = ?', [userId])
+    const userInfo = (userRows as any[])[0]
+    res.json({ code: 0, data: { token, userId, nickname: userInfo?.nickname || '小菜', avatar_url: userInfo?.avatar_url || '' } })
   } catch (err: any) {
     console.error('[Auth] Login failed:', err.message)
     res.status(500).json({ code: 50000, message: '服务器错误' })
diff --git a/server/src/routes/budget.ts b/server/src/routes/budget.ts
index 3febc48..8168420 100644
--- a/server/src/routes/budget.ts
+++ b/server/src/routes/budget.ts
@@ -12,14 +12,36 @@ function validateMonth(m: string): string {
 router.get('/', async (req: AuthRequest, res: Response) => {
   try {
     const month = validateMonth((req.query.month as string) || getCurrentMonth())
+    const group_id = req.query.group_id as string | undefined
 
-    const [rows] = await pool.query(
-      'SELECT * FROM budgets WHERE user_id = ? AND month = ?',
-      [req.userId, month]
-    )
+    if (group_id && group_id !== 'null') {
+      // 群组视图：所有成员的预算总和
+      const [memberCheck] = await pool.query(
+        'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+        [group_id, req.userId]
+      )
+      if ((memberCheck as any[]).length === 0) {
+        return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+      }
 
-    const budget = (rows as any[])[0] || null
-    res.json({ code: 0, data: budget })
+      const [rows] = await pool.query(
+        `SELECT COALESCE(SUM(amount), 0) as amount, month
+         FROM budgets
+         WHERE user_id IN (SELECT user_id FROM group_members WHERE group_id = ?) AND month = ?
+         GROUP BY month`,
+        [group_id, month]
+      )
+      const budget = (rows as any[])[0] || { amount: 0, month }
+      res.json({ code: 0, data: budget })
+    } else {
+      // 个人视图
+      const [rows] = await pool.query(
+        'SELECT * FROM budgets WHERE user_id = ? AND month = ?',
+        [req.userId, month]
+      )
+      const budget = (rows as any[])[0] || null
+      res.json({ code: 0, data: budget })
+    }
   } catch (err) {
     console.error('[Budget] GET error:', err)
     res.status(500).json({ code: 50000, message: '服务器错误' })
diff --git a/server/src/routes/group.ts b/server/src/routes/group.ts
new file mode 100644
index 0000000..522ee40
--- /dev/null
+++ b/server/src/routes/group.ts
@@ -0,0 +1,255 @@
+import { Router, Response } from 'express'
+import { randomInt } from 'crypto'
+import pool from '../db/connection'
+import { AuthRequest } from '../middleware/auth'
+
+const router = Router()
+
+/** 生成 6 位随机邀请码（密码学安全） */
+function generateInviteCode(): string {
+  const chars = 'ABCDEFGHJKLMNPQRSTUVWXYZ23456789'
+  let code = ''
+  for (let i = 0; i < 6; i++) {
+    code += chars.charAt(randomInt(chars.length))
+  }
+  return code
+}
+
+/** 创建群组 */
+router.post('/', async (req: AuthRequest, res: Response) => {
+  try {
+    const { name } = req.body
+    const trimmedName = typeof name === 'string' ? name.trim() : ''
+    if (!trimmedName) {
+      return res.status(400).json({ code: 40001, message: '群组名称不能为空' })
+    }
+    if (trimmedName.length > 100) {
+      return res.status(400).json({ code: 40001, message: '群组名称不能超过100个字符' })
+    }
+
+    // 生成唯一邀请码
+    let inviteCode = generateInviteCode()
+    let attempts = 0
+    while (attempts < 10) {
+      const [existing] = await pool.query('SELECT id FROM `groups` WHERE invite_code = ?', [inviteCode])
+      if ((existing as any[]).length === 0) break
+      inviteCode = generateInviteCode()
+      attempts++
+    }
+
+    const conn = await pool.getConnection()
+    try {
+      await conn.beginTransaction()
+
+      const [result] = await conn.query(
+        'INSERT INTO `groups` (name, invite_code, created_by) VALUES (?, ?, ?)',
+        [trimmedName, inviteCode, req.userId]
+      )
+      const groupId = (result as any).insertId
+
+      // 创建者自动成为 owner
+      await conn.query(
+        'INSERT INTO group_members (group_id, user_id, role) VALUES (?, ?, ?)',
+        [groupId, req.userId, 'owner']
+      )
+
+      await conn.commit()
+      res.json({ code: 0, data: { id: groupId, invite_code: inviteCode } })
+    } catch (err) {
+      await conn.rollback()
+      throw err
+    } finally {
+      conn.release()
+    }
+  } catch (err) {
+    console.error('[Group] POST error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 获取用户的群组列表 */
+router.get('/', async (req: AuthRequest, res: Response) => {
+  try {
+    const [rows] = await pool.query(
+      `SELECT g.id, g.name, g.invite_code, g.created_by, g.created_at,
+              gm.role, gm.nickname as my_nickname,
+              (SELECT COUNT(*) FROM group_members WHERE group_id = g.id) as member_count
+       FROM \`groups\` g
+       INNER JOIN group_members gm ON g.id = gm.group_id AND gm.user_id = ?
+       ORDER BY g.created_at DESC`,
+      [req.userId]
+    )
+    res.json({ code: 0, data: rows })
+  } catch (err) {
+    console.error('[Group] GET error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 获取群组详情 + 成员列表 */
+router.get('/:id', async (req: AuthRequest, res: Response) => {
+  try {
+    // 验证用户是否是群组成员
+    const [memberCheck] = await pool.query(
+      'SELECT role FROM group_members WHERE group_id = ? AND user_id = ?',
+      [req.params.id, req.userId]
+    )
+    if ((memberCheck as any[]).length === 0) {
+      return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+    }
+
+    const [groupRows] = await pool.query(
+      'SELECT id, name, invite_code, created_by, created_at FROM `groups` WHERE id = ?',
+      [req.params.id]
+    )
+    const group = (groupRows as any[])[0]
+    if (!group) {
+      return res.status(404).json({ code: 40400, message: '群组不存在' })
+    }
+
+    // 获取成员列表
+    const [members] = await pool.query(
+      `SELECT gm.user_id, gm.role, gm.nickname, gm.created_at as joined_at,
+              u.nickname as user_nickname, u.avatar_url
+       FROM group_members gm
+       LEFT JOIN users u ON gm.user_id = u.id
+       WHERE gm.group_id = ?
+       ORDER BY gm.role DESC, gm.created_at ASC`,
+      [req.params.id]
+    )
+
+    res.json({ code: 0, data: { ...group, members } })
+  } catch (err) {
+    console.error('[Group] GET by ID error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 通过邀请码加入群组 */
+router.post('/join', async (req: AuthRequest, res: Response) => {
+  try {
+    const { invite_code } = req.body
+    if (!invite_code || typeof invite_code !== 'string') {
+      return res.status(400).json({ code: 40001, message: '邀请码不能为空' })
+    }
+
+    const [groupRows] = await pool.query(
+      'SELECT id, name FROM `groups` WHERE invite_code = ?',
+      [invite_code.toUpperCase()]
+    )
+    const group = (groupRows as any[])[0]
+    if (!group) {
+      return res.status(404).json({ code: 40400, message: '邀请码无效' })
+    }
+
+    // 检查是否已是成员
+    const [existing] = await pool.query(
+      'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+      [group.id, req.userId]
+    )
+    if ((existing as any[]).length > 0) {
+      return res.status(400).json({ code: 40002, message: '你已经是该群组成员' })
+    }
+
+    await pool.query(
+      'INSERT INTO group_members (group_id, user_id, role) VALUES (?, ?, ?)',
+      [group.id, req.userId, 'member']
+    )
+
+    res.json({ code: 0, data: { group_id: group.id, name: group.name } })
+  } catch (err) {
+    console.error('[Group] join error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 退出群组 */
+router.post('/:id/leave', async (req: AuthRequest, res: Response) => {
+  try {
+    const groupId = req.params.id
+
+    // 检查是否是成员
+    const [memberRows] = await pool.query(
+      'SELECT role FROM group_members WHERE group_id = ? AND user_id = ?',
+      [groupId, req.userId]
+    )
+    const member = (memberRows as any[])[0]
+    if (!member) {
+      return res.status(404).json({ code: 40400, message: '你不是该群组成员' })
+    }
+
+    // owner 不能退出，只能解散
+    if (member.role === 'owner') {
+      return res.status(400).json({ code: 40003, message: '群主不能退出，请先转让或解散群组' })
+    }
+
+    const conn = await pool.getConnection()
+    try {
+      await conn.beginTransaction()
+
+      // 清除该用户在该群组的记录标签
+      await conn.query(
+        'UPDATE transactions SET group_id = NULL WHERE user_id = ? AND group_id = ?',
+        [req.userId, groupId]
+      )
+
+      // 删除成员关系
+      await conn.query(
+        'DELETE FROM group_members WHERE group_id = ? AND user_id = ?',
+        [groupId, req.userId]
+      )
+
+      await conn.commit()
+      res.json({ code: 0 })
+    } catch (err) {
+      await conn.rollback()
+      throw err
+    } finally {
+      conn.release()
+    }
+  } catch (err) {
+    console.error('[Group] leave error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 解散群组（仅 owner） */
+router.delete('/:id', async (req: AuthRequest, res: Response) => {
+  try {
+    const [groupRows] = await pool.query(
+      'SELECT created_by FROM `groups` WHERE id = ?',
+      [req.params.id]
+    )
+    const group = (groupRows as any[])[0]
+    if (!group) {
+      return res.status(404).json({ code: 40400, message: '群组不存在' })
+    }
+    if (group.created_by !== req.userId) {
+      return res.status(403).json({ code: 40300, message: '仅群主可解散群组' })
+    }
+
+    const conn = await pool.getConnection()
+    try {
+      await conn.beginTransaction()
+
+      // 清除该群组所有记录的标签
+      await conn.query('UPDATE transactions SET group_id = NULL WHERE group_id = ?', [req.params.id])
+
+      // 删除群组（CASCADE 自动清理 group_members）
+      await conn.query('DELETE FROM `groups` WHERE id = ?', [req.params.id])
+
+      await conn.commit()
+      res.json({ code: 0 })
+    } catch (err) {
+      await conn.rollback()
+      throw err
+    } finally {
+      conn.release()
+    }
+  } catch (err) {
+    console.error('[Group] DELETE error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+export default router
diff --git a/server/src/routes/stats.ts b/server/src/routes/stats.ts
index 627c761..3258151 100644
--- a/server/src/routes/stats.ts
+++ b/server/src/routes/stats.ts
@@ -6,19 +6,49 @@ import { getCurrentMonth, getMonthRange } from '../utils/date'
 const router = Router()
 const VALID_TYPES = ['expense', 'income']
 
+/** 根据 group_id 参数构建 WHERE 条件（含成员验证） */
+async function buildWhereClause(
+  userId: number | undefined,
+  groupId: string | undefined,
+  extraConditions: string[] = []
+): Promise<{ where: string; params: any[] } | null> {
+  const params: any[] = []
+
+  if (groupId && groupId !== 'null') {
+    // 验证用户是群组成员
+    const [memberCheck] = await pool.query(
+      'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+      [groupId, userId]
+    )
+    if ((memberCheck as any[]).length === 0) return null
+
+    params.push(groupId)
+    let where = `WHERE t.user_id IN (SELECT user_id FROM group_members WHERE group_id = ?)`
+    if (extraConditions.length > 0) where += ' AND ' + extraConditions.join(' AND ')
+    return { where, params }
+  }
+
+  params.push(userId)
+  let where = `WHERE t.user_id = ?`
+  if (extraConditions.length > 0) where += ' AND ' + extraConditions.join(' AND ')
+  return { where, params }
+}
+
 router.get('/overview', async (req: AuthRequest, res: Response) => {
   try {
-    const { month, startDate: qStart, endDate: qEnd } = req.query
+    const { month, startDate: qStart, endDate: qEnd, group_id } = req.query
 
     let startDate: string
     let endDate: string
     let elapsedDays = 1
 
     if (qStart && qEnd) {
-      // 按日期范围查询（用于今日等场景）
       startDate = qStart as string
       endDate = qEnd as string
-      elapsedDays = 1
+      // 计算日期范围天数
+      const start = new Date(startDate)
+      const end = new Date(endDate)
+      elapsedDays = Math.max(1, Math.ceil((end.getTime() - start.getTime()) / 86400000) + 1)
     } else {
       const m = (month as string) || getCurrentMonth()
       const range = getMonthRange(m)
@@ -31,13 +61,20 @@ router.get('/overview', async (req: AuthRequest, res: Response) => {
       elapsedDays = isCurrentMonth ? now.getDate() : new Date(year, mon, 0).getDate()
     }
 
+    const result = await buildWhereClause(
+      req.userId,
+      group_id as string | undefined,
+      ['t.date >= ?', 't.date <= ?']
+    )
+    if (!result) return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+
     const [rows] = await pool.query(
       `SELECT
-        COALESCE(SUM(CASE WHEN type = 'expense' THEN amount ELSE 0 END), 0) as expense,
-        COALESCE(SUM(CASE WHEN type = 'income' THEN amount ELSE 0 END), 0) as income,
+        COALESCE(SUM(CASE WHEN t.type = 'expense' THEN t.amount ELSE 0 END), 0) as expense,
+        COALESCE(SUM(CASE WHEN t.type = 'income' THEN t.amount ELSE 0 END), 0) as income,
         COUNT(*) as count
-       FROM transactions WHERE user_id = ? AND date >= ? AND date <= ?`,
-      [req.userId, startDate, endDate]
+       FROM transactions t ${result.where}`,
+      [...result.params, startDate, endDate]
     )
     const row = (rows as any[])[0]
     const daily = elapsedDays > 0 ? Math.round(row.expense / elapsedDays) : 0
@@ -54,7 +91,7 @@ router.get('/overview', async (req: AuthRequest, res: Response) => {
 
 router.get('/category', async (req: AuthRequest, res: Response) => {
   try {
-    const { month, type = 'expense' } = req.query
+    const { month, type = 'expense', group_id } = req.query
     if (!VALID_TYPES.includes(type as string)) {
       return res.status(400).json({ code: 40002, message: '类型无效' })
     }
@@ -63,14 +100,21 @@ router.get('/category', async (req: AuthRequest, res: Response) => {
     if (!range) return res.status(400).json({ code: 40001, message: '月份格式无效' })
     const { startDate, endDate } = range
 
+    const result = await buildWhereClause(
+      req.userId,
+      group_id as string | undefined,
+      ['t.type = ?', 't.date >= ?', 't.date <= ?']
+    )
+    if (!result) return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+
     const [rows] = await pool.query(
       `SELECT c.id, COALESCE(c.name, '未分类') as name, COALESCE(c.icon, '?') as icon, COALESCE(c.color, '#BFB3B3') as color, SUM(t.amount) as amount, COUNT(t.id) as count
        FROM transactions t
        LEFT JOIN categories c ON t.category_id = c.id
-       WHERE t.user_id = ? AND t.type = ? AND t.date >= ? AND t.date <= ?
+       ${result.where}
        GROUP BY c.id
        ORDER BY amount DESC`,
-      [req.userId, type, startDate, endDate]
+      [...result.params, type, startDate, endDate]
     )
 
     res.json({ code: 0, data: rows })
@@ -82,7 +126,7 @@ router.get('/category', async (req: AuthRequest, res: Response) => {
 
 router.get('/trend', async (req: AuthRequest, res: Response) => {
   try {
-    const { month, type = 'expense' } = req.query
+    const { month, type = 'expense', group_id } = req.query
     if (!VALID_TYPES.includes(type as string)) {
       return res.status(400).json({ code: 40002, message: '类型无效' })
     }
@@ -91,13 +135,20 @@ router.get('/trend', async (req: AuthRequest, res: Response) => {
     if (!range) return res.status(400).json({ code: 40001, message: '月份格式无效' })
     const { startDate, endDate } = range
 
+    const result = await buildWhereClause(
+      req.userId,
+      group_id as string | undefined,
+      ['t.type = ?', 't.date >= ?', 't.date <= ?']
+    )
+    if (!result) return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+
     const [rows] = await pool.query(
-      `SELECT DATE_FORMAT(date, '%Y-%m-%d') as date, SUM(amount) as amount
-       FROM transactions
-       WHERE user_id = ? AND type = ? AND date >= ? AND date <= ?
-       GROUP BY date
-       ORDER BY date`,
-      [req.userId, type, startDate, endDate]
+      `SELECT DATE_FORMAT(t.date, '%Y-%m-%d') as date, SUM(t.amount) as amount
+       FROM transactions t
+       ${result.where}
+       GROUP BY t.date
+       ORDER BY t.date`,
+      [...result.params, type, startDate, endDate]
     )
 
     res.json({ code: 0, data: rows })
diff --git a/server/src/routes/transaction.ts b/server/src/routes/transaction.ts
index 4b1e735..605cbb6 100644
--- a/server/src/routes/transaction.ts
+++ b/server/src/routes/transaction.ts
@@ -16,12 +16,21 @@ function safeInt(val: any, fallback: number, min: number, max: number): number {
 router.get('/:id', async (req: AuthRequest, res: Response) => {
   try {
     const [rows] = await pool.query(
-      `SELECT t.id, t.user_id, t.amount, t.type, t.category_id, t.note, DATE_FORMAT(t.date, '%Y-%m-%d') as date, t.created_at, t.updated_at,
-              c.name as category_name, c.icon as category_icon, c.color as category_color
+      `SELECT t.id, t.user_id, t.amount, t.type, t.category_id, t.note, DATE_FORMAT(t.date, '%Y-%m-%d') as date, t.created_at, t.updated_at, t.group_id,
+              c.name as category_name, c.icon as category_icon, c.color as category_color,
+              u.nickname as creator_nickname
        FROM transactions t
        LEFT JOIN categories c ON t.category_id = c.id
-       WHERE t.id = ? AND t.user_id = ?`,
-      [req.params.id, req.userId]
+       LEFT JOIN users u ON t.user_id = u.id
+       WHERE t.id = ? AND (
+         t.user_id = ?
+         OR t.user_id IN (
+           SELECT gm2.user_id FROM group_members gm1
+           JOIN group_members gm2 ON gm1.group_id = gm2.group_id
+           WHERE gm1.user_id = ?
+         )
+       )`,
+      [req.params.id, req.userId, req.userId]
     )
     const tx = (rows as any[])[0]
     if (!tx) {
@@ -36,13 +45,30 @@ router.get('/:id', async (req: AuthRequest, res: Response) => {
 
 router.get('/', async (req: AuthRequest, res: Response) => {
   try {
-    const { page, pageSize, type, startDate, endDate, sortBy } = req.query
+    const { page, pageSize, type, startDate, endDate, sortBy, group_id } = req.query
     const pSize = safeInt(pageSize, 20, 1, 100)
     const pNum = safeInt(page, 1, 1, 99999)
     const offset = (pNum - 1) * pSize
 
-    let where = 'WHERE t.user_id = ?'
-    const params: any[] = [req.userId]
+    let where = ''
+    const params: any[] = []
+
+    if (group_id && group_id !== 'null') {
+      // 群组视图：群组下所有成员的记录
+      const [memberCheck] = await pool.query(
+        'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+        [group_id, req.userId]
+      )
+      if ((memberCheck as any[]).length === 0) {
+        return res.status(403).json({ code: 40300, message: '无权访问此群组' })
+      }
+      where = 'WHERE t.user_id IN (SELECT user_id FROM group_members WHERE group_id = ?)'
+      params.push(group_id)
+    } else {
+      // 个人视图：我的所有记录（不管 group_id）
+      where = 'WHERE t.user_id = ?'
+      params.push(req.userId)
+    }
 
     if (type && VALID_TYPES.includes(type as string)) {
       where += ' AND t.type = ?'; params.push(type)
@@ -57,10 +83,12 @@ router.get('/', async (req: AuthRequest, res: Response) => {
     const orderBy = sortBy === 'amount' ? 't.amount DESC' : 't.date DESC, t.created_at DESC'
 
     const [rows] = await pool.query(
-      `SELECT t.id, t.user_id, t.amount, t.type, t.category_id, t.note, DATE_FORMAT(t.date, '%Y-%m-%d') as date, t.created_at, t.updated_at,
-              c.name as category_name, c.icon as category_icon, c.color as category_color
+      `SELECT t.id, t.user_id, t.amount, t.type, t.category_id, t.note, DATE_FORMAT(t.date, '%Y-%m-%d') as date, t.created_at, t.updated_at, t.group_id,
+              c.name as category_name, c.icon as category_icon, c.color as category_color,
+              u.nickname as creator_nickname
        FROM transactions t
        LEFT JOIN categories c ON t.category_id = c.id
+       LEFT JOIN users u ON t.user_id = u.id
        ${where}
        ORDER BY ${orderBy}
        LIMIT ? OFFSET ?`,
@@ -89,7 +117,7 @@ router.get('/', async (req: AuthRequest, res: Response) => {
 
 router.post('/', async (req: AuthRequest, res: Response) => {
   try {
-    const { amount, type, category_id, note, date } = req.body
+    const { amount, type, category_id, note, date, group_id } = req.body
     if (amount === undefined || amount === null || typeof amount !== 'number' || !Number.isInteger(amount) || amount <= 0 || amount > 999999999) {
       return res.status(400).json({ code: 40001, message: '金额必须为1-999999999之间的正整数（单位：分）' })
     }
@@ -106,9 +134,21 @@ router.post('/', async (req: AuthRequest, res: Response) => {
       return res.status(400).json({ code: 40004, message: '备注不能超过200字' })
     }
 
+    // 如果指定了 group_id，验证类型和用户是群组成员
+    const validGroupId = group_id && typeof group_id === 'number' && Number.isInteger(group_id) ? group_id : null
+    if (validGroupId) {
+      const [memberCheck] = await pool.query(
+        'SELECT id FROM group_members WHERE group_id = ? AND user_id = ?',
+        [validGroupId, req.userId]
+      )
+      if ((memberCheck as any[]).length === 0) {
+        return res.status(403).json({ code: 40300, message: '无权在此群组记账' })
+      }
+    }
+
     const [result] = await pool.query(
-      'INSERT INTO transactions (user_id, amount, type, category_id, note, date) VALUES (?, ?, ?, ?, ?, ?)',
-      [req.userId, amount, type, category_id || null, note || null, date]
+      'INSERT INTO transactions (user_id, amount, type, category_id, note, date, group_id) VALUES (?, ?, ?, ?, ?, ?, ?)',
+      [req.userId, amount, type, category_id || null, note || null, date, validGroupId]
     )
 
     res.json({ code: 0, data: { id: (result as any).insertId } })
diff --git a/server/src/routes/user.ts b/server/src/routes/user.ts
new file mode 100644
index 0000000..54506ee
--- /dev/null
+++ b/server/src/routes/user.ts
@@ -0,0 +1,133 @@
+import { Router, Response } from 'express'
+import multer from 'multer'
+import path from 'path'
+import fs from 'fs'
+import pool from '../db/connection'
+import { AuthRequest } from '../middleware/auth'
+
+const router = Router()
+
+// 头像上传配置
+const UPLOAD_DIR = process.env.UPLOAD_DIR || './uploads'
+const AVATAR_DIR = path.resolve(UPLOAD_DIR, 'avatars')
+if (!fs.existsSync(AVATAR_DIR)) {
+  fs.mkdirSync(AVATAR_DIR, { recursive: true })
+}
+
+const storage = multer.diskStorage({
+  destination: (_req, _file, cb) => {
+    // 确保目录存在（可能被手动删除）
+    if (!fs.existsSync(AVATAR_DIR)) {
+      fs.mkdirSync(AVATAR_DIR, { recursive: true })
+    }
+    cb(null, AVATAR_DIR)
+  },
+  filename: (req: AuthRequest, file, cb) => {
+    const extMap: Record<string, string> = {
+      'image/jpeg': '.jpg', 'image/png': '.png', 'image/webp': '.webp'
+    }
+    const ext = extMap[file.mimetype] || '.jpg'
+    cb(null, `${req.userId}_${Date.now()}${ext}`)
+  }
+})
+
+const upload = multer({
+  storage,
+  limits: { fileSize: 2 * 1024 * 1024 }, // 最大 2MB
+  fileFilter: (_req, file, cb) => {
+    const allowed = ['image/jpeg', 'image/png', 'image/webp']
+    if (allowed.includes(file.mimetype)) {
+      cb(null, true)
+    } else {
+      cb(new Error('仅支持 JPEG、PNG、WebP 格式'))
+    }
+  }
+})
+
+/** 获取当前用户信息 */
+router.get('/me', async (req: AuthRequest, res: Response) => {
+  try {
+    const [rows] = await pool.query(
+      'SELECT id, nickname, avatar_url, created_at FROM users WHERE id = ?',
+      [req.userId]
+    )
+    const user = (rows as any[])[0]
+    if (!user) {
+      return res.status(404).json({ code: 40400, message: '用户不存在' })
+    }
+    res.json({ code: 0, data: user })
+  } catch (err) {
+    console.error('[User] GET /me error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 更新用户昵称 */
+router.put('/me', async (req: AuthRequest, res: Response) => {
+  try {
+    const { nickname } = req.body
+
+    if (nickname !== undefined) {
+      if (typeof nickname !== 'string' || nickname.trim().length === 0) {
+        return res.status(400).json({ code: 40001, message: '昵称不能为空' })
+      }
+      if (nickname.length > 50) {
+        return res.status(400).json({ code: 40001, message: '昵称不能超过50个字符' })
+      }
+    }
+
+    const updates: string[] = []
+    const params: any[] = []
+
+    if (nickname !== undefined) {
+      updates.push('nickname = ?')
+      params.push(nickname.trim())
+    }
+
+    if (updates.length === 0) {
+      return res.status(400).json({ code: 40001, message: '没有需要更新的字段' })
+    }
+
+    params.push(req.userId)
+    await pool.query(`UPDATE users SET ${updates.join(', ')} WHERE id = ?`, params)
+
+    res.json({ code: 0 })
+  } catch (err) {
+    console.error('[User] PUT /me error:', err)
+    res.status(500).json({ code: 50000, message: '服务器错误' })
+  }
+})
+
+/** 上传头像 */
+router.post('/avatar', (req: AuthRequest, res: Response) => {
+  upload.single('file')(req, res, async (err) => {
+    if (err) {
+      return res.status(400).json({ code: 40001, message: err.message })
+    }
+    if (!req.file) {
+      return res.status(400).json({ code: 40001, message: '请选择图片文件' })
+    }
+    try {
+      // 先查询旧头像
+      const [rows] = await pool.query('SELECT avatar_url FROM users WHERE id = ?', [req.userId])
+      const oldUrl = (rows as any[])[0]?.avatar_url
+
+      // 先更新 DB，再删旧文件（保证 DB 和文件至少有一个正确）
+      await pool.query('UPDATE users SET avatar_url = ? WHERE id = ?', [req.file.filename, req.userId])
+
+      if (oldUrl) {
+        const oldPath = path.join(AVATAR_DIR, oldUrl)
+        if (fs.existsSync(oldPath)) {
+          fs.unlinkSync(oldPath)
+        }
+      }
+
+      res.json({ code: 0, data: { avatar_url: req.file.filename } })
+    } catch (err) {
+      console.error('[User] avatar upload error:', err)
+      res.status(500).json({ code: 50000, message: '服务器错误' })
+    }
+  })
+})
+
+export default router
diff --git a/server/src/utils/backup.ts b/server/src/utils/backup.ts
index 080a732..5697474 100644
--- a/server/src/utils/backup.ts
+++ b/server/src/utils/backup.ts
@@ -1,21 +1,18 @@
-import { execFile } from 'child_process'
 import { promisify } from 'util'
 import path from 'path'
 import fs from 'fs'
 import zlib from 'zlib'
+import pool from '../db/connection'
 
-const execFileAsync = promisify(execFile)
 const gzipAsync = promisify(zlib.gzip)
 
 const BACKUP_DIR = process.env.BACKUP_DIR || '/var/backups/xiaocai'
-const MAX_BACKUPS = 7 // 保留最近 7 天的备份
 
 /**
- * 执行数据库备份
- * @returns 备份文件路径
+ * 使用 Node.js mysql2 备份数据库（不依赖 mysqldump）
+ * 导出所有表的 INSERT 语句，gzip 压缩存储
  */
 export async function backupDatabase(): Promise<string> {
-  // 确保备份目录存在
   if (!fs.existsSync(BACKUP_DIR)) {
     fs.mkdirSync(BACKUP_DIR, { recursive: true })
   }
@@ -24,64 +21,64 @@ export async function backupDatabase(): Promise<string> {
   const filename = `xiaocai_${date}.sql.gz`
   const filepath = path.join(BACKUP_DIR, filename)
 
-  const dbHost = process.env.DB_HOST || 'localhost'
-  const dbUser = process.env.DB_USER || 'root'
-  const dbPassword = process.env.DB_PASSWORD || ''
-  const dbName = process.env.DB_NAME || 'xiaocai'
+  const lines: string[] = []
+  lines.push(`-- 小菜记账 数据库备份`)
+  lines.push(`-- 时间: ${new Date().toISOString()}`)
+  lines.push('')
 
-  try {
-    // 使用 execFile 避免命令注入，参数通过数组传递
-    const args = [
-      `-h${dbHost}`,
-      `-u${dbUser}`,
-      ...(dbPassword ? [`-p${dbPassword}`] : []),
-      dbName
-    ]
+  // 获取所有表名
+  const [tables] = await pool.query('SHOW TABLES')
+  const tableNames = (tables as any[]).map(row => Object.values(row)[0] as string)
 
-    const { stdout } = await execFileAsync('mysqldump', args, { maxBuffer: 50 * 1024 * 1024 })
+  for (const tableName of tableNames) {
+    lines.push(`-- ----------------------------`)
+    lines.push(`-- 表: ${tableName}`)
+    lines.push(`-- ----------------------------`)
 
-    // 使用 Node.js zlib 压缩
-    const compressed = await gzipAsync(Buffer.from(stdout, 'utf-8'))
-    fs.writeFileSync(filepath, compressed)
+    // 获取表数据
+    const [rows] = await pool.query(`SELECT * FROM \`${tableName}\``)
+    const data = rows as any[]
 
-    console.log(`[Backup] 完成: ${filename}`)
-
-    // 清理旧备份
-    await cleanOldBackups()
-
-    return filepath
-  } catch (err) {
-    console.error('[Backup] 失败:', err)
-    throw err
-  }
-}
-
-/**
- * 清理过期的备份文件
- */
-async function cleanOldBackups(): Promise<void> {
-  try {
-    if (!fs.existsSync(BACKUP_DIR)) return
-
-    const files = fs.readdirSync(BACKUP_DIR)
-      .filter(f => f.startsWith('xiaocai_') && (f.endsWith('.sql.gz') || f.endsWith('.sql')))
-      .sort()
-      .reverse()
-
-    // 删除超出保留数量的文件
-    for (let i = MAX_BACKUPS; i < files.length; i++) {
-      const filepath = path.join(BACKUP_DIR, files[i])
-      fs.unlinkSync(filepath)
-      console.log(`[Backup] 清理旧备份: ${files[i]}`)
+    if (data.length === 0) {
+      lines.push(`-- ${tableName}: 无数据`)
+      lines.push('')
+      continue
     }
-  } catch (err) {
-    console.error('[Backup] 清理失败:', err)
+
+    // 获取列名
+    const columns = Object.keys(data[0])
+    const colList = columns.map(c => `\`${c}\``).join(', ')
+
+    // 生成 INSERT 语句（每 100 行一批）
+    const BATCH_SIZE = 100
+    for (let i = 0; i < data.length; i += BATCH_SIZE) {
+      const batch = data.slice(i, i + BATCH_SIZE)
+      const values = batch.map(row => {
+        const vals = columns.map(col => {
+          const v = row[col]
+          if (v === null) return 'NULL'
+          if (typeof v === 'number') return String(v)
+          if (typeof v === 'boolean') return v ? '1' : '0'
+          // mysql2 escape 处理所有字符串/日期转义（自带引号）
+          return pool.escape(v)
+        })
+        return `(${vals.join(', ')})`
+      }).join(',\n  ')
+
+      lines.push(`INSERT INTO \`${tableName}\` (${colList}) VALUES`)
+      lines.push(`  ${values};`)
+    }
+    lines.push('')
   }
+
+  const sql = lines.join('\n')
+  const compressed = await gzipAsync(Buffer.from(sql, 'utf-8'))
+  fs.writeFileSync(filepath, compressed)
+
+  console.log(`[Backup] 完成: ${filename} (${tableNames.length} 表)`)
+  return filepath
 }
 
-/**
- * 获取备份列表
- */
 export function getBackupList(): Array<{ name: string; size: number; date: string }> {
   if (!fs.existsSync(BACKUP_DIR)) return []
 
diff --git a/server/yarn.lock b/server/yarn.lock
index c315397..17a9c83 100644
--- a/server/yarn.lock
+++ b/server/yarn.lock
@@ -60,7 +60,7 @@
     "@types/range-parser" "*"
     "@types/send" "*"
 
-"@types/express@^4.17.21":
+"@types/express@*", "@types/express@^4.17.21":
   version "4.17.25"
   resolved "https://registry.npmjs.org/@types/express/-/express-4.17.25.tgz"
   integrity sha512-dVd04UKsfpINUnK0yBoYHDF3xu7xVH4BuDotC/xGuycx4CgbP48X/KF/586bcObxT0HENHXEU8Nqtu6NR+eKhw==
@@ -80,6 +80,13 @@
   resolved "https://registry.npmjs.org/@types/mime/-/mime-1.3.5.tgz"
   integrity sha512-/pyBZWSLD2n0dcHE3hq8s8ZvcETHtEuF+3E7XVt0Ig2nvsVQXdghHVcEkIWjy9A0wKfTn97a/PSDYohKIlnP/w==
 
+"@types/multer@^2.1.0":
+  version "2.1.0"
+  resolved "https://registry.npmjs.org/@types/multer/-/multer-2.1.0.tgz"
+  integrity sha512-zYZb0+nJhOHtPpGDb3vqPjwpdeGlGC157VpkqNQL+UU2qwoacoQ7MpsAmUptI/0Oa127X32JzWDqQVEXp2RcIA==
+  dependencies:
+    "@types/express" "*"
+
 "@types/node@*", "@types/node@^20.11.0", "@types/node@>= 8":
   version "20.19.41"
   resolved "https://registry.npmjs.org/@types/node/-/node-20.19.41.tgz"
@@ -129,6 +136,11 @@ accepts@~1.3.8:
     mime-types "~2.1.34"
     negotiator "0.6.3"
 
+append-field@^1.0.0:
+  version "1.0.0"
+  resolved "https://registry.npmjs.org/append-field/-/append-field-1.0.0.tgz"
+  integrity sha512-klpgFSWLW1ZEs8svjfb7g4qWY0YS5imI82dTg+QahUvJ8YqAY0P10Uk8tTyh9ZGuYEZEMaeJYCF5BFuX552hsw==
+
 array-flatten@1.1.1:
   version "1.1.1"
   resolved "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz"
@@ -164,6 +176,18 @@ braces@^3.0.3:
   dependencies:
     fill-range "^7.1.1"
 
+buffer-from@^1.0.0:
+  version "1.1.2"
+  resolved "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz"
+  integrity sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ==
+
+busboy@^1.6.0:
+  version "1.6.0"
+  resolved "https://registry.npmjs.org/busboy/-/busboy-1.6.0.tgz"
+  integrity sha512-8SFQbg/0hQ9xy3UNTB0YEnsNBbWfhf7RtnzpL7TkBiTBRfrQ9Fxcnz7VJsleJpyp6rVLvXiuORqjlHi5q+PYuA==
+  dependencies:
+    streamsearch "^1.1.0"
+
 bytes@~3.1.2:
   version "3.1.2"
   resolved "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz"
@@ -185,6 +209,16 @@ call-bound@^1.0.2:
     call-bind-apply-helpers "^1.0.2"
     get-intrinsic "^1.3.0"
 
+concat-stream@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.npmjs.org/concat-stream/-/concat-stream-2.0.0.tgz"
+  integrity sha512-MWufYdFw53ccGjCA+Ol7XJYpAlW6/prSMzuPOTRnJGcGzuhLn4Scrz7qf6o8bROZ514ltazcIFJZevcfbo0x7A==
+  dependencies:
+    buffer-from "^1.0.0"
+    inherits "^2.0.3"
+    readable-stream "^3.0.2"
+    typedarray "^0.0.6"
+
 content-disposition@~0.5.4:
   version "0.5.4"
   resolved "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz"
@@ -535,7 +569,7 @@ iconv-lite@~0.4.24:
   dependencies:
     safer-buffer ">= 2.1.2 < 3"
 
-inherits@~2.0.4:
+inherits@^2.0.3, inherits@~2.0.4:
   version "2.0.4"
   resolved "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz"
   integrity sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==
@@ -669,6 +703,16 @@ ms@2.1.3:
   resolved "https://registry.npmjs.org/ms/-/ms-2.1.3.tgz"
   integrity sha512-6FlzubTLZG3J2a/NVCAleEhjzq5oxgHyaCU9yYXvcLsvoVaHJq/s5xXI6/XXP6tz7R9xAOtHnSO/tXtF3WRTlA==
 
+multer@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.npmjs.org/multer/-/multer-2.1.1.tgz"
+  integrity sha512-mo+QTzKlx8R7E5ylSXxWzGoXoZbOsRMpyitcht8By2KHvMbf3tjwosZ/Mu/XYU6UuJ3VZnODIrak5ZrPiPyB6A==
+  dependencies:
+    append-field "^1.0.0"
+    busboy "^1.6.0"
+    concat-stream "^2.0.0"
+    type-is "^1.6.18"
+
 mysql2@^3.9.0:
   version "3.22.4"
   resolved "https://registry.npmjs.org/mysql2/-/mysql2-3.22.4.tgz"
@@ -804,6 +848,15 @@ raw-body@~2.5.3:
     iconv-lite "~0.4.24"
     unpipe "~1.0.0"
 
+readable-stream@^3.0.2:
+  version "3.6.2"
+  resolved "https://registry.npmjs.org/readable-stream/-/readable-stream-3.6.2.tgz"
+  integrity sha512-9u/sniCrY3D5WdsERHzHE4G2YCXqoG5FTHUiCC4SIbr6XcLZBY05ya9EKjYek9O5xOAwjGq+1JdGBAS7Q9ScoA==
+  dependencies:
+    inherits "^2.0.3"
+    string_decoder "^1.1.1"
+    util-deprecate "^1.0.1"
+
 rechoir@^0.6.2:
   version "0.6.2"
   resolved "https://registry.npmjs.org/rechoir/-/rechoir-0.6.2.tgz"
@@ -833,7 +886,7 @@ run-parallel@^1.1.9:
   dependencies:
     queue-microtask "^1.2.2"
 
-safe-buffer@5.2.1:
+safe-buffer@~5.2.0, safe-buffer@5.2.1:
   version "5.2.1"
   resolved "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz"
   integrity sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==
@@ -967,6 +1020,18 @@ statuses@~2.0.1, statuses@~2.0.2:
   resolved "https://registry.npmjs.org/statuses/-/statuses-2.0.2.tgz"
   integrity sha512-DvEy55V3DB7uknRo+4iOGT5fP1slR8wQohVdknigZPMpMstaKJQWhwiYBACJE3Ul2pTnATihhBYnRhZQHGBiRw==
 
+streamsearch@^1.1.0:
+  version "1.1.0"
+  resolved "https://registry.npmjs.org/streamsearch/-/streamsearch-1.1.0.tgz"
+  integrity sha512-Mcc5wHehp9aXz1ax6bZUyY5afg9u2rv5cqQI3mRrYkGC8rW2hM02jWuwjtL++LS5qinSyhj2QfLyNsuc+VsExg==
+
+string_decoder@^1.1.1:
+  version "1.3.0"
+  resolved "https://registry.npmjs.org/string_decoder/-/string_decoder-1.3.0.tgz"
+  integrity sha512-hkRX8U1WjJFd8LsDJ2yQ/wWWxaopEsABU1XfkM8A+j0+85JAGppt16cr1Whg6KIbb4okU6Mql6BOj+uup/wKeA==
+  dependencies:
+    safe-buffer "~5.2.0"
+
 strip-eof@^1.0.0:
   version "1.0.0"
   resolved "https://registry.npmjs.org/strip-eof/-/strip-eof-1.0.0.tgz"
@@ -998,7 +1063,7 @@ tsx@^4.7.0:
   optionalDependencies:
     fsevents "~2.3.3"
 
-type-is@~1.6.18:
+type-is@^1.6.18, type-is@~1.6.18:
   version "1.6.18"
   resolved "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz"
   integrity sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==
@@ -1006,6 +1071,11 @@ type-is@~1.6.18:
     media-typer "0.3.0"
     mime-types "~2.1.24"
 
+typedarray@^0.0.6:
+  version "0.0.6"
+  resolved "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz"
+  integrity sha512-/aCDEGatGvZ2BIk+HmLf4ifCJFwvKFNb9/JeZPMulfgFracn9QFcAf5GO8B/mweUjSoblS5In0cWhqpfs/5PQA==
+
 typescript@^5.3.0:
   version "5.9.3"
   resolved "https://registry.npmjs.org/typescript/-/typescript-5.9.3.tgz"
@@ -1021,6 +1091,11 @@ unpipe@~1.0.0:
   resolved "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz"
   integrity sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ==
 
+util-deprecate@^1.0.1:
+  version "1.0.2"
+  resolved "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz"
+  integrity sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==
+
 utils-merge@1.0.1:
   version "1.0.1"
   resolved "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz"