diff --git a/server/routers/auth_router.py b/server/routers/auth_router.py
index 766711f8..7895a50e 100644
--- a/server/routers/auth_router.py
+++ b/server/routers/auth_router.py
@@ -1,4 +1,5 @@
 from datetime import datetime
+import re
 
 from fastapi import APIRouter, Depends, HTTPException, Request, status, UploadFile, File
 from fastapi.security import OAuth2PasswordRequestForm
@@ -60,8 +61,9 @@ class UserResponse(BaseModel):
 
 
 class InitializeAdmin(BaseModel):
-    username: str
+    user_id: str  # 直接输入用户ID
     password: str
+    phone_number: str | None = None
 
 
 class UsernameValidation(BaseModel):
@@ -182,21 +184,34 @@ async def initialize_admin(admin_data: InitializeAdmin, db: Session = Depends(ge
     # 创建管理员账户
     hashed_password = AuthUtils.hash_password(admin_data.password)
 
-    # 验证用户名
-    is_valid, error_msg = validate_username(admin_data.username)
-    if not is_valid:
+    # 验证用户ID格式（只支持字母数字和下划线）
+    if not re.match(r'^[a-zA-Z0-9_]+$', admin_data.user_id):
         raise HTTPException(
             status_code=status.HTTP_400_BAD_REQUEST,
-            detail=error_msg,
+            detail="用户ID只能包含字母、数字和下划线",
         )
 
-    # 生成user_id
-    existing_user_ids = []
-    user_id = generate_unique_user_id(admin_data.username, existing_user_ids)
+    if len(admin_data.user_id) < 3 or len(admin_data.user_id) > 20:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="用户ID长度必须在3-20个字符之间",
+        )
+
+    # 验证手机号格式（如果提供了）
+    if admin_data.phone_number and not is_valid_phone_number(admin_data.phone_number):
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="手机号格式不正确"
+        )
+
+    # 由于是首次初始化，直接使用输入的user_id
+    user_id = admin_data.user_id
 
     new_admin = User(
-        username=admin_data.username,
+        username=admin_data.user_id,  # username和user_id设置为相同值
         user_id=user_id,
+        phone_number=admin_data.phone_number,
+        avatar=None,  # 初始化时头像为空
         password_hash=hashed_password,
         role="superadmin",
         last_login=datetime.now()
diff --git a/web/src/components/AgentChatComponent.vue b/web/src/components/AgentChatComponent.vue
index 3a99731d..45e8a1f7 100644
--- a/web/src/components/AgentChatComponent.vue
+++ b/web/src/components/AgentChatComponent.vue
@@ -222,7 +222,7 @@ const currentAgentId = computed(() => {
 });
 
 const currentAgentMetadata = computed(() => {
-  if (agentStore?.metadata && CurrentAgentId.value in agentStore?.metadata[currentAgentId.value]) {
+  if (agentStore?.metadata && currentAgentId.value in agentStore?.metadata[currentAgentId.value]) {
     return agentStore?.metadata[currentAgentId.value]
   }
   return {}
diff --git a/web/src/components/UserManagementComponent.vue b/web/src/components/UserManagementComponent.vue
index 2aff4659..cf3b7b60 100644
--- a/web/src/components/UserManagementComponent.vue
+++ b/web/src/components/UserManagementComponent.vue
@@ -176,7 +176,7 @@
 
 <script setup>
 import { reactive, onMounted, watch } from 'vue';
-import { notification } from 'ant-design-vue';
+import { notification, Modal } from 'ant-design-vue';
 import { useUserStore } from '@/stores/user';
 import {
   DeleteOutlined,
@@ -423,9 +423,7 @@ const confirmDeleteUser = (user) => {
   }
 
   // 确认对话框
-  const { modal } = notification;
-
-  modal.confirm({
+  Modal.confirm({
     title: '确认删除用户',
     content: `确定要删除用户 "${user.username}" 吗？此操作不可撤销。`,
     okText: '删除',
diff --git a/web/src/views/LoginView.vue b/web/src/views/LoginView.vue
index 8d67a5bd..74b01234 100644
--- a/web/src/views/LoginView.vue
+++ b/web/src/views/LoginView.vue
@@ -39,8 +39,12 @@
 
       <!-- 初始化管理员表单 -->
       <div v-if="isFirstRun" class="login-form">
-        <h2>系统初始化</h2>
-        <p class="init-desc">系统首次运行，请创建超级管理员账户：</p>
+        <h2>系统初始化，请创建超级管理员账户</h2>
+        <div class="init-tips">
+          <p>• 请输入用户ID（仅支持字母、数字和下划线）</p>
+          <p>• 手机号可选填写，用于后续登录</p>
+          <p>• 请妥善保管管理员账户信息</p>
+        </div>
 
         <a-form
           :model="adminForm"
@@ -48,11 +52,50 @@
           layout="vertical"
         >
           <a-form-item
-            label="用户名"
-            name="username"
-            :rules="[{ required: true, message: '请输入用户名' }]"
+            label="用户ID"
+            name="user_id"
+            :rules="[
+              { required: true, message: '请输入用户ID' },
+              {
+                pattern: /^[a-zA-Z0-9_]+$/,
+                message: '用户ID只能包含字母、数字和下划线'
+              },
+              {
+                min: 3,
+                max: 20,
+                message: '用户ID长度必须在3-20个字符之间'
+              }
+            ]"
           >
-            <a-input v-model:value="adminForm.username" prefix-icon="user" />
+            <a-input
+              v-model:value="adminForm.user_id"
+              placeholder="请输入用户ID（3-20个字符）"
+              :maxlength="20"
+            />
+          </a-form-item>
+
+          <a-form-item
+            label="手机号（可选）"
+            name="phone_number"
+            :rules="[
+              {
+                validator: async (rule, value) => {
+                  if (!value || value.trim() === '') {
+                    return; // 空值允许
+                  }
+                  const phoneRegex = /^1[3-9]\d{9}$/;
+                  if (!phoneRegex.test(value)) {
+                    throw new Error('请输入正确的手机号格式');
+                  }
+                }
+              }
+            ]"
+          >
+            <a-input
+              v-model:value="adminForm.phone_number"
+              placeholder="可用于登录，可不填写"
+              :max-length="11"
+            />
           </a-form-item>
 
           <a-form-item
@@ -175,7 +218,7 @@
 </template>
 
 <script setup>
-import { ref, reactive, onMounted, onUnmounted, computed } from 'vue';
+import { ref, reactive, onMounted, onUnmounted, computed, watch } from 'vue';
 import { useRouter } from 'vue-router';
 import { useUserStore } from '@/stores/user';
 import { useInfoStore } from '@/stores/info';
@@ -215,9 +258,10 @@ const loginForm = reactive({
 
 // 管理员初始化表单
 const adminForm = reactive({
-  username: '',
+  user_id: '', // 改为直接输入user_id
   password: '',
-  confirmPassword: ''
+  confirmPassword: '',
+  phone_number: '' // 手机号字段（可选）
 });
 
 // 开发中功能提示
@@ -269,14 +313,13 @@ const formatTime = (seconds) => {
 };
 
 // 密码确认验证
-const validateConfirmPassword = (rule, value) => {
+const validateConfirmPassword = async (rule, value) => {
   if (value === '') {
-    return Promise.reject('请确认密码');
+    throw new Error('请确认密码');
   }
   if (value !== adminForm.password) {
-    return Promise.reject('两次输入的密码不一致');
+    throw new Error('两次输入的密码不一致');
   }
-  return Promise.resolve();
 };
 
 // 处理登录
@@ -388,8 +431,9 @@ const handleInitialize = async () => {
     }
 
     await userStore.initialize({
-      username: adminForm.username,
-      password: adminForm.password
+      user_id: adminForm.user_id,
+      password: adminForm.password,
+      phone_number: adminForm.phone_number || null // 空字符串转为null
     });
 
     message.success('管理员账户创建成功');
@@ -624,10 +668,28 @@ onUnmounted(() => {
   }
 }
 
-.init-desc {
-  margin-bottom: 24px;
-  color: #666;
-  text-align: center;
+.init-tips {
+  background: #f6ffed;
+  border: 1px solid #b7eb8f;
+  border-radius: 6px;
+  padding: 12px 16px;
+  margin-bottom: 20px;
+  text-align: left;
+
+  p {
+    margin: 4px 0;
+    font-size: 13px;
+    color: #52c41a;
+    line-height: 1.4;
+
+    &:first-child {
+      margin-top: 0;
+    }
+
+    &:last-child {
+      margin-bottom: 0;
+    }
+  }
 }
 
 .error-message {