单个帖子主题超出问题修复；

app/views/messages/_project_show.html.erb

@@ -93,7 +93,7 @@
       <%= link_to @topic.author, user_path(@topic.author) %>
     </p>
   </div>
-  <div class="memo-section">
+  <div class="memo-section" style="width: 100%;word-break: break-all;">
     <div class="memo-title <%= @topic.sticky? ? 'sticky' : '' %> <%= @topic.locked? ? 'locked' : '' %>">
       <% if @project %>
           <%= label_tag l(:field_subject) %>: <%= link_to @topic.subject, project_boards_path(@topic.project) %>