prevent pagination buttons from getting selected, contain article errors

src/app/article/article.component.html

@@ -1,3 +1,4 @@
+<ng-container *ngIf="article">
   <h2>{{ article.title }}</h2>
   <div class="intro" [innerHTML]="article.intro"></div>
   <ng-container *ngIf="article.images.length">
@@ -11,3 +12,4 @@
       <li *ngFor="let tag of article.tags">{{ tag }}</li>
     </ul>
   </div>
+</ng-container>

src/app/list-paginate/list-paginate.component.styl

@@ -5,6 +5,7 @@
   font-weight: 900
   font-size: 16px
   display: block
+  user-select: none
 
 fa-icon, a
   color: #666