聊天功能优化，部分问题修复

pageChat/components/chat-item.vue

@@ -13,11 +13,10 @@
     :src="item.image_url"
     class="img"
     mode="widthFix"
-    @click="previewVideo(item.video_url)"
   ></video>
   <view class="" v-if="item.msg_type == 4">
     <view>{{ item.coupon.title }}</view>
-    <view class="u-m-t-16 bg-f7 coupon u-flex">
+    <view class="u-m-t-16 bg-f7 coupon u-flex u-col-stretch" style="min-width: 500rpx;">
       <template v-if="item.coupon.type == 1">
         <view class="left">
           <view class="price">
@@ -76,10 +75,10 @@
           
         </view>
       </template>
-     <view class="right u-p-l-28">
-        <view class="u-font-32 ">{{item.coupon.couponName}}</view>
-        <view class="u-font-24 color-999 u-m-t-8">有效期：{{ returnTime(item.coupon) }} </view>
-     </view>
+      <view class="right u-p-l-28 u-flex u-col-center">
+        <view class="u-font-32">{{ item.coupon.couponName }}</view>
+        
+      </view>
     </view>
   </view>
 </template>
@@ -141,5 +140,8 @@ function returnTime(coupon){
     color: #999;
   }
 }
+.u-col-stretch{
+  align-items: stretch;
+}
 </style>