refactor(layout): 重构基础布局头部组件结构

src/layouts/base-layout/base-layout-header/base-layout-header.vue

@@ -0,0 +1,16 @@
+<script setup lang="ts">
+import LanguageSwitchButton from './components/LanguageSwitchButton.vue';
+import ThemeSwitchButton from './components/ThemeSwitchButton.vue';
+import ToggleSiderButton from './components/ToggleSiderButton.vue';
+</script>
+
+<template>
+  <div class="h-full flex items-center justify-between px-12px shadow-header dark:shadow-gray-700">
+    <ToggleSiderButton />
+
+    <div class="flex items-center">
+      <LanguageSwitchButton />
+      <ThemeSwitchButton />
+    </div>
+  </div>
+</template>