管理后台初始化，登录，团队管理，报价单管理 完成

src/components/Layout/Header.jsx

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+import React from 'react';
+import { Layout, Switch, Button, Dropdown } from 'antd';
+import { UserOutlined, LogoutOutlined } from '@ant-design/icons';
+import { useTheme } from '@/contexts/ThemeContext';
+import { useAuth } from '@/contexts/AuthContext';
+import { MenuTrigger } from '../common/MenuTrigger';
+
+const { Header: AntHeader } = Layout;
+
+const Header = ({ collapsed, setCollapsed }) => {
+  const { isDarkMode, toggleTheme } = useTheme();
+  const { user, logout } = useAuth();
+
+  const handleLogout = async () => {
+    try {
+      await logout();
+    } catch (error) {
+      console.error('Logout error:', error);
+    }
+  };
+
+  const userMenuItems = [
+    {
+      key: 'profile',
+      icon: <UserOutlined />,
+      label: '个人信息',
+    },
+    {
+      key: 'logout',
+      icon: <LogoutOutlined />,
+      label: '退出登录',
+      onClick: handleLogout,
+    },
+  ];
+
+  return (
+    <AntHeader 
+      style={{ 
+        padding: 0, 
+        background: isDarkMode ? '#141414' : '#fff',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'space-between'
+      }}
+    >
+      <div className="flex items-center">
+        <MenuTrigger 
+          collapsed={collapsed} 
+          setCollapsed={setCollapsed}
+          isDarkMode={isDarkMode}
+        />
+      </div>
+      
+      <div className="flex items-center gap-4 mr-6">
+        <Switch
+          checked={isDarkMode}
+          onChange={toggleTheme}
+          checkedChildren="🌙"
+          unCheckedChildren="☀️"
+        />
+        
+        <Dropdown 
+          menu={{ items: userMenuItems }} 
+          placement="bottomRight"
+          trigger={['click']}
+        >
+          <Button 
+            type="text" 
+            icon={<UserOutlined />}
+            className="flex items-center"
+          >
+            {user?.email}
+          </Button>
+        </Dropdown>
+      </div>
+    </AntHeader>
+  );
+};
+
+export default Header;