适配新接口、插件；更新附录、通知书、课外书；修复、优化部分功能

templates/friends.html

@@ -40,6 +40,7 @@
 
                         <div th:each="postInfo, iterstat: ${friends.items}" th:id="${'post-'+postInfo.metadata.name}"
                             class="loop_content p_item moment_item uk-animation-slide-bottom-small"
+                            th:if="${postInfo.spec != null and not #strings.isEmpty(postInfo.spec.description)}"
                             th:with="spec = ${postInfo.spec}">
 
                             <div class="p_item_inner">