h大健康群公告列表页面重构，详情页处理接口及样式兼容，群消息页面的群公告显示重构，群聊邀请审核扫码模式处理接口及样式；

pages/im/group/info.vue

@@ -5,8 +5,10 @@
         </view>
 
         <u-cell-group class="cells" :border="false">
-            <u-cell :border="false" class="u-border-bottom" isLink title="群公告" :label="announcement"
-                @click="toAnnouncement" />
+            <u-cell :border="false" class="u-border-bottom" isLink title="群公告" 
+                @click="toAnnouncement" >
+                <view slot="label" class="announcement-label "> {{announcement}} </view>
+            </u-cell>
             <u-cell :border="false" class="u-border-bottom" isLink title="二维码" @click="showGroupQrCode" />
             <u-cell :border="false" class="u-border-bottom" v-if="group.can_makesure" isLink title="群聊邀请确认"
                 @click="showGroupsSure" />
@@ -105,10 +107,13 @@
             })
             this.initData()
             uni.$on('groupAnnouncementCreated', this.initData)
-            uni.$on('groupInvitedUser', this.updateUserList)
+            uni.$on('groupInvitedUser', this.updateUserList)
+            uni.$on('updateAnnouncement',this.initData)
         },
         onUnload() {
             uni.$off('groupAnnouncementCreated')
+            uni.$off('groupInvitedUser')
+            uni.$off('updateAnnouncement')
         },
         methods: {
             updateUserList() {
@@ -335,7 +340,20 @@
 
     .cells {
         margin-top: $padding;
-        background-color: white;
+        background-color: white;
+        .announcement-label{
+            font-size: $title-size-m + 2;
+            padding-top: 10rpx;
+            color: $text-gray-m;
+            overflow: hidden;
+            width: 620rpx;
+            display: inline-block;
+            overflow:hidden; 
+            text-overflow:ellipsis;
+            display:-webkit-box; 
+            -webkit-box-orient:vertical;
+            -webkit-line-clamp:3; 
+        }
     }
 
     .members {