Use mentions in threads.

redesign/nimforum.scss

@@ -248,4 +248,20 @@ blockquote {
 
 .quote-link {
   float: right;
+}
+
+.user-mention {
+  @extend .chip;
+  vertical-align: initial;
+  font-weight: bold;
+  display: inline-block;
+  font-size: 85%;
+  height: inherit;
+  padding: 0.08rem 0.4rem;
+  background-color: darken($bg-color-dark, 5%);
+
+  img {
+    @extend .avatar;
+    @extend .avatar-sm;
+  }
 }

redesign/thread.html

@@ -159,7 +159,11 @@
   Unix is a cancer.
 </blockquote>
 <p>We also want to be able to highlight user mentions:</p>
-<p>Please let <a class="user-mention" href="#">@Araq</a> know that this forum is awesome.</p>
+<p>Please let
+   <span class="user-mention">
+     @Araq
+   </span>
+   know that this forum is awesome.</p>
             </div>
             <div class="post-buttons">
               <div class="like-button">