add router scrollBehavior

apps/frontend/src/router/index.ts

@@ -93,6 +93,13 @@ const routes = [
 const router = createRouter({
   history: createWebHistory(import.meta.env.BASE_URL),
   routes,
+  scrollBehavior(to, from, savedPosition) {
+    if (savedPosition) {
+      return savedPosition
+    } else {
+      return { top: 0, behavior: 'smooth' }
+    }
+  },
 })
 
 export default router