refactor: add smooth scroll when a route is changed

src/router/index.js

@@ -293,6 +293,10 @@ const routes = [
 const router = createRouter({
   history: createWebHashHistory(process.env.BASE_URL),
   routes,
+  scrollBehavior() {
+    // always scroll to top
+    return { top: 0 }
+  },
 })
 
 export default router