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/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">