app/templates/components/header.html

<header class="header">
    <nav class="nav">
        <div class="nav-brand">
            <a href="{{ url_for('main.index') }}" class="logo">个人博客</a>
        </div>
        <div class="nav-links">
            <a href="{{ url_for('main.index') }}" class="nav-link">首页</a>
            {% if session.get('logged_in') %}
                <a href="{{ url_for('admin.dashboard') }}" class="nav-link">管理</a>
            {% endif %}
        </div>
    </nav>
</header>