添加chapter和lesson

Html/apps/templates/navbar.html

@@ -84,11 +84,18 @@
     <div class="logo">
         <h1>华实君：教学练评一体的虚拟助教</h1>
     </div>
-    <nav class="navbar-links">
+    {% if role == 'teacher' %}
+        <!-- 如果是教师角色 -->
+        <a href="/teacherindex">首页</a>
+        <a href="/teacherdashboard">课程</a>
+        <a href="/teachergrades">成绩</a>
+    {% else %}
+        <!-- 如果是学生角色 -->
         <a href="/">首页</a>
         <a href="/dashboard">课程</a>
-        <a href="/">成绩</a>
-    </nav>
+        <a href="/grades">成绩</a>
+    {% endif %}
+
     <div class="avatar dropdown">
         <img src="/static/image/algorithm/book_cover.png" alt="个人头像" class="avatar-img">
         <div class="dropdown-content">