统一聊天页的头像大小，改用rpx2px的计算，84rpx

pages/im/index.vue

@@ -19,7 +19,7 @@
             </view>
         </view>
         <!-- content -->
-        <view v-if="$store.state.token !== ''">
+        <view v-if="$store.state.token !== ''">
             <connection-status :connection="connection" />
             <conversation-list @refresh="getConversationList()" :conversations="conversations" />
         </view>
@@ -76,13 +76,7 @@
         onHide() {
             uni.$off('onReceiveMessage')
         },
-        methods: {
-            onDemo(){
-                console.log('1111')
-                uni.navigateTo({
-                    url: '/pages/im/chatDemo'
-                })
-            },
+        methods: {
             checkNewFriendPending() {
                 im.getPendingList((pendings) => {
                     this.hasNewFriends = pendings.length