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src/components/common/Header2.vue

@@ -86,6 +86,7 @@ export default {
     props: ['home'],
     data() {
         return {
+            localUsername: localStorage.getItem('U_name') || 'unknown user',
             isProofreading: false,
             collapse: false,
             fullscreen: false,
@@ -131,9 +132,10 @@ export default {
         }
     },
     computed: {
+
         username() {
-            let username = localStorage.getItem('U_name');
-            return username ? username : this.name;
+           
+            return this.localUsername ? this.localUsername : this.name;
         },
         onRoutes() {
             0;
@@ -153,6 +155,11 @@ export default {
         }
     },
     methods: {
+        updateUsername() {
+           
+            this.localUsername = localStorage.getItem('U_name');
+          
+        },
         goHome() {
             this.$router.push('/');
         },
@@ -272,10 +279,19 @@ export default {
         }
     },
     mounted() {
+        if (this.$bus) { // 检查 $bus 是否存在，避免未定义错误
+            this.$bus.$on('user-name-updated', this.updateUsername);
+        }
         if (document.body.clientWidth < 1000) {
             this.collapseChage();
         }
     },
+    beforeDestroy() {
+        // 步骤 C2: 销毁前移除监听器
+        if (this.$bus) {
+            this.$bus.$off('user-name-updated', this.updateUsername);
+        }
+    },
     watch: {
         $route: {
             handler: function (route) {