班级、项目动态增加“私有内容，谨慎传播”提示

public/assets/wechat/course_discussion.html

@@ -5,6 +5,7 @@
         <div class="post-container">
             <div loading-spinner></div>
             <div class="post-wrapper" style="margin-top:0;">
+                <div class="tac f16 fb c-black" style="padding-top:10px;">私有内容，请谨慎传播</div>
                 <div class="post-main">
                     <div class="post-avatar fl mr10"><img ng-src="{{discussion.user.img_url}}" width="30" height="30" class="border-radius img-circle" /></div>
                     <div class="post-dynamic-author hidden fl">

public/assets/wechat/course_notice.html

@@ -4,6 +4,7 @@
 <div ng-if="news.act_type == 'News'">
     <div class="post-container">
         <div class="post-wrapper" style="margin-top:0;">
+            <div class="tac f16 fb c-black" style="padding-top:10px;">私有内容，请谨慎传播</div>
             <div class="post-main">
                 <div class="post-avatar fl mr10"><img ng-src="{{news.author.img_url}}" width="30" height="30" class="border-radius img-circle" /></div>
                 <div class="post-dynamic-author hidden fl">

public/assets/wechat/homework_detail.html

@@ -4,6 +4,7 @@
 <div ng-if="homework.act_type == 'HomeworkCommon'">
     <div class="post-container">
         <div class="post-wrapper" style="margin-top:0;">
+            <div class="tac f16 fb c-black" style="padding-top:10px;">私有内容，请谨慎传播</div>
             <div class="post-main">
                 <div class="post-avatar fl mr10"><img ng-src="{{homework.author.img_url}}" width="30" height="30" class="border-radius img-circle" /></div>
                 <div class="post-dynamic-author hidden fl">

public/assets/wechat/issue_detail.html

@@ -4,6 +4,7 @@
 <div ng-if="issue.act_type == 'Issue'">
     <div class="post-container">
         <div class="post-wrapper" style="margin-top:0;">
+            <div class="tac f16 fb c-black" style="padding-top:10px;">私有内容，请谨慎传播</div>
             <div class="post-main">
 
                 <div class="post-avatar fl mr10"><img ng-src="{{issue.author.img_url}}" width="30" height="30" class="border-radius img-circle" /></div>

public/assets/wechat/project_discussion.html

@@ -4,6 +4,7 @@
 <div ng-if="discussion.act_type == 'Message'">
     <div class="post-container">
         <div class="post-wrapper" style="margin-top:0;">
+            <div class="tac f16 fb c-black" style="padding-top:10px;">私有内容，请谨慎传播</div>
             <div class="post-main">
                 <div class="post-avatar fl mr10"><img ng-src="{{discussion.user.img_url}}" width="30" height="30" class="border-radius img-circle" /></div>
                 <div class="post-dynamic-author hidden fl">