fix.

src/shared/layout/default.vue

@@ -0,0 +1,24 @@
+<script setup lang="ts">
+import Login from "../Login/index.vue"
+import Signup from "../Signup/index.vue"
+import Header from "../Header/index.vue"
+</script>
+
+<template>
+  <el-container>
+    <el-header class="header">
+      <Header />
+    </el-header>
+    <el-main>
+      <router-view></router-view>
+    </el-main>
+    <Login />
+    <Signup />
+  </el-container>
+</template>
+
+<style scoped>
+.header {
+  display: flex;
+}
+</style>