refactor: use nuxt compatiable 4 folder

app/pages/404.vue

@@ -0,0 +1,17 @@
+<script setup lang="ts">
+// const router = useRouter()
+</script>
+
+<template>
+  <main p="x4 y10" text="center green-700 dark:gray-200">
+    <div text-4xl>
+      <div i-ri-error-warning-line inline-block />
+    </div>
+    <div>菜谱消失了</div>
+    <div>
+      <NuxtLink text-sm btn m="3 t8" to="/">
+        返回主页
+      </NuxtLink>
+    </div>
+  </main>
+</template>