fix: optimize login button display

src/views/blog/blog.vue

@@ -88,7 +88,7 @@ import axios from 'axios';
 
 const userinfo = userInfoStore();
 const activeMenu = ref('1');
-const u_name = ref('登录')
+const u_name = userinfo.user.name === ''?'登录':userinfo.user.name
 
 // 控制登录弹窗的显示与隐藏
 const loginDialog = ref(false);
@@ -169,12 +169,12 @@ watch(route, () => {
 });
 
 const blogLogin = () => {
-    if (userinfo.user.role == 'admin') {
+    if (userinfo.user.role === 'admin') {
         const origin = window.location.origin
         const redirect_uri = `${origin}/admin`
         window.open(redirect_uri, '_blank')
     }
-    if (u_name.value == '登录') {
+    if (u_name === '登录') {
         loginDialog.value = true;
     } else {
         router.push('/me')