增加品牌详情封面图

@@ -120,6 +120,7 @@ class Brand extends Api
             if($res){
                 $res['image'] = $this->auth->absolutionUrlOne($res['image']);
                 $res['file'] = $this->auth->absolutionUrlOne($res['file']);
+                $res['file_cover'] = $this->auth->absolutionUrlOneFrame($res['file'],1);
                 $res['image_long'] = $this->auth->absolutionUrlOne($res['image_long']);
                 $res['tag'] = explode('|',$res['tag']);
             }