feat: 初始版本，圆角主题与首次管理员引导

app/templates/users/edit.html

@@ -0,0 +1,12 @@
+{% extends 'base.html' %}
+{% block title %}编辑资料{% endblock %}
+{% block content %}
+<h3>编辑资料</h3>
+<form method="post">
+  <input type="hidden" name="csrf_token" value="{{ csrf_token }}">
+  <div class="mb-3"><label class="form-label">简介</label><textarea class="form-control" name="bio"></textarea></div>
+  <div class="mb-3"><label class="form-label">年级</label><input class="form-control" name="grade"></div>
+  <div class="mb-3"><label class="form-label">班级</label><input class="form-control" name="class_name"></div>
+  <button class="btn btn-primary" type="submit">保存</button>
+</form>
+{% endblock %}