add dak robot

Author: zhenghao.zhu

docs/zh/theme/main.html

@@ -32,6 +32,7 @@
     </script>
 {% endblock %}
 
+{% block content %}
 <div class="dak-copilot">
   <iframe src="https://console.d.run/ai-chat-app/ai-chat?mode=mobile&amp;ws=302&amp;token=N2ZlNjFkZDItNDkyMy00Y2I1LWJlM2QtZDJlMzQ2YWM5OTE5"></iframe>
 </div>
@@ -61,4 +62,5 @@
   border: none;
   border-radius: 8px;
 }
-</style>
+</style>
+{% endblock %}