detail 优化

@@ -282,7 +282,7 @@ const getMessageDetail = (uid, params, limit) => {
                         image: _.get(msg, 'body.image', ''),
                         content: _.get(msg, 'body.text', ''),
                         btnLink: _.get(msg, 'body.pc_link', ''),
-                        btnName: _.get(msg, 'body.button_text', '')
+                        btnName: _.get(msg, 'body.button_text', '') || '查看详情'
                     };
                     break;
                 case 'pushCoupon':

@@ -74,7 +74,9 @@
                                 <img src="{{image2 image}}">
                             </div>
                             <p>{{{content}}}</p>
+                            {{#if btnLink}}
                                 <a href="{{btnLink}}" class="sale-btn">{{btnName}}</a>
+                            {{/if}}
                         {{/ sale}}
                     </div>
                 {{/ message}}