fix: move translation button to rightmost

app/src/components/header/LanguageSelector.vue

@@ -0,0 +1,26 @@
+<script setup lang="ts">
+import { useI18n } from 'vue-i18n'
+import { setLocale, type SupportedLocale } from '../../i18n'
+
+const { locale } = useI18n({ useScope: 'global' })
+
+function changeLanguage(event: Event) {
+  const selectedLocale = (event.target as HTMLSelectElement)
+    .value as SupportedLocale
+
+  setLocale(selectedLocale)
+}
+</script>
+
+<template>
+  <select
+    :value="locale"
+    class="bg-bg-secondary px-3 py-2 text-sm text-text shadow-md outline-none"
+    aria-label="Language"
+    @change="changeLanguage"
+    style="font-size: 2vh"
+  >
+    <option value="en">English</option>
+    <option value="zh-TW">繁體中文</option>
+  </select>
+</template>