feat:添加视频时长

src/App.vue

@@ -453,7 +453,10 @@ export default {
         item.preload = true;
         return new Promise((res, rej) => {
           item.oncanplay = function() {
-            res(item.duration);
+            res({
+              src: item.src,
+              duration: item.duration
+            });
           };
         });
       });

src/components/header/md-header.vue

@@ -183,7 +183,7 @@ export default {
         {
           name: "call",
           icon: "aite",
-          tip: "@用户",
+          tip: "@好友",
           startStr: "@",
           endStr: ""
         },