Header.js

import React from 'react';
import { AppBar, Toolbar, Typography, IconButton, Box, Button } from '@mui/material';
import MenuIcon from '@mui/icons-material/Menu';
import AccountCircleIcon from '@mui/icons-material/AccountCircle';
import NotificationsIcon from '@mui/icons-material/Notifications';
import SettingsIcon from '@mui/icons-material/Settings';
import { useNavigate } from 'react-router-dom';

const Header = ({ toggleSidebar, systemInfo }) => {
  const navigate = useNavigate();

  return (
    <AppBar position="fixed" sx={{ zIndex: (theme) => theme.zIndex.drawer + 1 }}>
      <Toolbar>
        <IconButton
          color="inherit"
          aria-label="open drawer"
          edge="start"
          onClick={toggleSidebar}
          sx={{ mr: 2 }}
        >
          <MenuIcon />
        </IconButton>
        <Typography variant="h6" noWrap component="div" sx={{ flexGrow: 1 }}>
          AnnabanOS Enhanced
          {systemInfo && ` - ${systemInfo.version}`}
        </Typography>
        
        <Box sx={{ display: 'flex', alignItems: 'center' }}>
          <Button 
            color="inherit" 
            startIcon={<NotificationsIcon />}
            sx={{ mr: 1 }}
          >
            Notifications
          </Button>
          
          <Button 
            color="inherit" 
            startIcon={<SettingsIcon />}
            onClick={() => navigate('/settings')}
            sx={{ mr: 1 }}
          >
            Settings
          </Button>
          
          <IconButton color="inherit">
            <AccountCircleIcon />
          </IconButton>
        </Box>
      </Toolbar>
    </AppBar>
  );
};

export default Header;