feat(router): 添加路由切换后页面滚动到顶部的功能

在路由配置中添加了 `scrollBehavior` 方法，确保每次路由切换后页面滚动到顶部，提升用户体验。

 /*
 /*
  * @Date: 2025-04-17 14:26:17
  * @Date: 2025-04-17 14:26:17
  * @LastEditors: hookehuyr hookehuyr@gmail.com
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-04-21 15:07:36
+ * @LastEditTime: 2025-04-21 15:36:27
  * @FilePath: /mlaj-reading-club/src/main.js
  * @FilePath: /mlaj-reading-club/src/main.js
  * @Description: 文件描述
  * @Description: 文件描述
  */
  */
@@ -30,7 +30,11 @@ const router = createRouter({
     { path: '/check-in/:id', component: () => import('./pages/CheckIn.vue') },
     { path: '/check-in/:id', component: () => import('./pages/CheckIn.vue') },
     { path: '/messages', component: () => import('./pages/Messages.vue') },
     { path: '/messages', component: () => import('./pages/Messages.vue') },
     { path: '/:pathMatch(.*)*', redirect: '/' }
     { path: '/:pathMatch(.*)*', redirect: '/' }
-  ]
+  ],
+  scrollBehavior(to, from, savedPosition) {
+    // 每次路由切换后，页面滚动到顶部
+    return savedPosition || { top: 0, left: 0 }
+  },
 })
 })
 app.use(router)
 app.use(router)