fix: 确保默认Admin账户存在且登录用户名不区分大小写

app/templates/admin/checker.html

@@ -0,0 +1,20 @@
+{% extends 'base.html' %}
+{% block title %}审核员{% endblock %}
+{% block content %}
+<h3 class="mb-3">审核员管理</h3>
+<form class="card p-3 mb-3" method="post">
+  <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
+  <div class="mb-2"><input class="form-control" name="email" placeholder="邮箱" required></div>
+  <div class="mb-2"><input class="form-control" name="username" placeholder="用户名" required></div>
+  <div class="mb-2"><input class="form-control" name="password" type="password" placeholder="密码" required></div>
+  <button class="btn btn-brand" type="submit">创建审核员</button>
+</form>
+<div class="card p-3">
+  <h5>现有审核员</h5>
+  <ul>
+    {% for u in users %}
+    <li>{{ u.username }}（{{ u.email }}）</li>
+    {% endfor %}
+  </ul>
+</div>
+{% endblock %}