refactor: 规范化调整.vue文件结构及命名

src/views/error-page/404.vue

@@ -1,8 +1,3 @@
-<script setup>
-import { useRouter } from 'vue-router'
-const { replace } = useRouter()
-</script>
-
 <template>
   <div class="page-404">
     <n-result status="404" description="抱歉，您访问的页面不存在。">
@@ -16,6 +11,11 @@ const { replace } = useRouter()
   </div>
 </template>
 
+<script setup>
+import { useRouter } from 'vue-router'
+const { replace } = useRouter()
+</script>
+
 <style lang="scss" scoped>
 .page-404 {
   height: 100%;