feat: Add Personal Center module and UI improvements

- Add ProfilePage with avatar upload, password change, and module status display

- Update logo and favicon for login page and browser tab

- Redirect Data Cleaning module default route to Tool C

- Hide Settings button from top navigation for MVP

- Add avatar display in top navigation bar with refresh sync

- Add Prompt knowledge base integration development plan docs

frontend-v2/src/framework/auth/AuthContext.tsx

@@ -188,6 +188,19 @@ export function AuthProvider({ children }: AuthProviderProps) {
     return user.modules?.includes(moduleCode) || false;
   }, [user]);
 
+  /**
+   * 刷新用户信息（头像更新等场景使用）
+   */
+  const refreshUser = useCallback(async () => {
+    try {
+      const freshUser = await authApi.getCurrentUser();
+      setUser(freshUser);
+      authApi.saveUser(freshUser);
+    } catch (err) {
+      console.error('刷新用户信息失败:', err);
+    }
+  }, []);
+
   const value: AuthContextType = {
     user,
     isAuthenticated: !!user,
@@ -201,7 +214,8 @@ export function AuthProvider({ children }: AuthProviderProps) {
     refreshToken,
     hasPermission,
     hasRole,
-    hasModule,  // 新增
+    hasModule,
+    refreshUser,  // 2026-01-28: 头像更新等场景使用
   };
 
   return (

frontend-v2/src/framework/auth/api.ts

@@ -198,6 +198,29 @@ export async function changePassword(request: ChangePasswordRequest): Promise<vo
   }
 }
 
+/**
+ * 更新头像
+ */
+export async function updateAvatar(avatarUrl: string): Promise<{ avatarUrl: string }> {
+  const response = await authFetch<{ avatarUrl: string }>(`${API_BASE}/me/avatar`, {
+    method: 'PUT',
+    body: JSON.stringify({ avatarUrl }),
+  });
+
+  if (!response.success || !response.data) {
+    throw new Error(response.message || '更新头像失败');
+  }
+
+  // 更新本地存储的用户信息
+  const user = getSavedUser();
+  if (user) {
+    user.avatarUrl = avatarUrl;
+    saveUser(user);
+  }
+
+  return response.data;
+}
+
 /**
  * 刷新Token
  */

frontend-v2/src/framework/auth/types.ts

@@ -29,6 +29,13 @@ export interface AuthUser {
   isDefaultPassword: boolean;
   permissions: string[];
   modules: string[];  // 用户可访问的模块代码列表（如 ['AIA', 'PKB', 'RVW']）
+  // 2026-01-28: 个人中心扩展字段
+  avatarUrl?: string | null;
+  status?: string;
+  kbQuota?: number;
+  kbUsed?: number;
+  isTrial?: boolean;
+  trialEndsAt?: string | null;  // ISO date string
 }
 
 /** Token信息 */
@@ -100,6 +107,8 @@ export interface AuthContextType extends AuthState {
   hasRole: (...roles: UserRole[]) => boolean;
   /** 检查模块权限 */
   hasModule: (moduleCode: string) => boolean;
+  /** 刷新用户信息（头像更新等场景使用） */
+  refreshUser: () => Promise<void>;
 }
 
 

frontend-v2/src/framework/layout/TopNavigation.tsx

@@ -1,17 +1,15 @@
-import { useState, useEffect } from 'react'
 import { useNavigate, useLocation } from 'react-router-dom'
 import { Dropdown, Avatar } from 'antd'
 import { 
   UserOutlined, 
   LogoutOutlined, 
-  SettingOutlined, 
+  // SettingOutlined,  // MVP阶段暂时隐藏设置按钮
   ControlOutlined,
   BankOutlined,
 } from '@ant-design/icons'
 import type { MenuProps } from 'antd'
 import { MODULES } from '../modules/moduleRegistry'
 import { useAuth } from '../auth'
-import type { ModuleDefinition } from '../modules/types'
 
 /**
  * 顶部导航栏组件
@@ -53,11 +51,12 @@ const TopNavigation = () => {
       icon: <UserOutlined />,
       label: '个人中心',
     },
-    {
-      key: 'settings',
-      icon: <SettingOutlined />,
-      label: '设置',
-    },
+    // MVP阶段暂时隐藏设置按钮
+    // {
+    //   key: 'settings',
+    //   icon: <SettingOutlined />,
+    //   label: '设置',
+    // },
     // 切换入口 - 根据权限显示
     ...(canAccessOrg || canAccessAdmin ? [{ type: 'divider' as const }] : []),
     ...(canAccessOrg ? [{
@@ -103,9 +102,9 @@ const TopNavigation = () => {
         onClick={() => navigate('/')}
       >
         <img 
-          src="/logo.jpg" 
+          src="/logo-new.png" 
           alt="AI临床研究平台" 
-          className="h-[52px] w-auto"
+          className="h-[48px] w-auto"
         />
         <span className="text-xl font-bold text-blue-600">AI临床研究平台</span>
       </div>
@@ -133,14 +132,15 @@ const TopNavigation = () => {
         })}
       </div>
 
-      {/* 用户菜单 - 显示真实用户信息 */}
+      {/* 用户菜单 - 显示真实用户信息和头像 */}
       <Dropdown 
         menu={{ items: userMenuItems, onClick: handleUserMenuClick }} 
         placement="bottomRight"
       >
         <div className="flex items-center gap-2 cursor-pointer px-3 py-2 rounded-md hover:bg-gray-50">
           <Avatar 
-            icon={<UserOutlined />} 
+            src={user?.avatarUrl}
+            icon={!user?.avatarUrl && <UserOutlined />} 
             size="small" 
           />
           <div className="flex flex-col">