refactor: 简化各页面模板，移除重复代码；添加plan_common.js

app/templates/templates.html

@@ -12,31 +12,6 @@
 </style>
 {% endblock %}
 
-{% block sidebar_nav %}
-<a class="nav-link" href="/">
-    <i class="bi bi-people"></i> 学员管理
-</a>
-<a class="nav-link" href="/settings">
-    <i class="bi bi-gear"></i> 问题配置
-</a>
-<a class="nav-link" href="/api-settings">
-    <i class="bi bi-key"></i> API设置
-</a>
-<a class="nav-link active" href="/templates">
-    <i class="bi bi-file-earmark-text"></i> 模板管理
-</a>
-<a class="nav-link" href="/classes">
-    <i class="bi bi-collection"></i> 班级管理
-</a>
-<a class="nav-link" href="/users" id="usersNav" style="display:none;">
-    <i class="bi bi-person-badge"></i> 用户管理
-</a>
-<hr>
-<a class="nav-link" href="#" onclick="logout()">
-    <i class="bi bi-box-arrow-right"></i> 退出登录
-</a>
-{% endblock %}
-
 {% block content %}
 <div class="d-flex justify-content-between align-items-center mb-4">
     <h4><i class="bi bi-file-earmark-text"></i> 模板管理</h4>
@@ -147,36 +122,15 @@
 {% endblock %}
 
 {% block extra_js %}
-<script src="https://cdn.jsdelivr.net/npm/easymde/dist/easymde.min.js"></script>
-<script>
+    <script>
 let templates = [];
 let currentTemplate = null;
 let editor = null;
 let createModal;
 
-document.addEventListener('DOMContentLoaded', () => {
+window.pageInit = function() {
     createModal = new bootstrap.Modal(document.getElementById('createModal'));
-    checkLogin();
-});
-
-function checkLogin() {
-    fetch('/api/check-login').then(r => r.json()).then(data => {
-        if (!data.logged_in) {
-            window.location.href = '/login';
-            return;
-        }
-        const userDisplay = data.username + ' (' + (data.role === 'admin' ? '管理员' : '用户') + ')';
-        document.getElementById('currentUserDisplay').textContent = userDisplay;
-        const mobileDisplay = document.getElementById('mobileUserDisplay');
-        if (mobileDisplay) mobileDisplay.textContent = userDisplay;
-
-        if (data.role === 'admin') {
-            document.getElementById('usersNav').style.display = '';
-        }
-        loadTemplates();
-    }).catch(() => {
-        window.location.href = '/login';
-    });
+    loadTemplates();
 }
 
 async function loadTemplates() {