Complete project files including setup.sh

templates/errors/404.html

@@ -0,0 +1,15 @@
+{% extends "base.html" %}
+
+{% block title %}页面未找到 - 404{% endblock %}
+
+{% block content %}
+<div class="container">
+    <div class="empty-state">
+        <div class="empty-icon">🔍</div>
+        <h1 style="font-size: 3rem; margin-bottom: 1rem;">404</h1>
+        <h2>页面未找到</h2>
+        <p>抱歉，您访问的页面不存在。</p>
+        <a href="{{ url_for('posts.index') }}" class="btn btn-primary" style="margin-top: 2rem;">返回首页</a>
+    </div>
+</div>
+{% endblock %}