feat: add switch with zh|en

frontend/src/i18n/index.js

@@ -0,0 +1,63 @@
+import { createI18n } from 'vue-i18n';
+
+const messages = {
+  zh: {
+    howItWorks: {
+      title: '工作原理',
+      step1: '在上面的输入框中，随意编造一个以 {domain} 结尾的邮箱地址。',
+      step2: '使用这个地址去注册任何网站或接收邮件。',
+      step3: '在这里输入您刚刚使用的地址，点击“查看收件箱”，即可看到邮件。',
+    },
+    language: '语言',
+    home: {
+      title: '您的专属临时邮箱，无限且私密',
+      subtitle: '输入任何',
+      subtitleAfter: '地址，立即在此查看收件箱。',
+      placeholder: '输入您的临时邮箱地址...',
+      copyTitle: '复制地址',
+      random: '随机生成',
+      checkInbox: '查看收件箱',
+      inbox: '收件箱',
+      refresh: '刷新',
+      loading: '正在加载...',
+      noMail: '暂无邮件',
+      selectMail: '请从选择一封邮件查看',
+      from: '发件人',
+      to: '收件人',
+    }
+  },
+  en: {
+    howItWorks: {
+      title: 'How it Works',
+      step1: 'Invent any email address ending in {domain} in the input box above.',
+      step2: 'Use this address to register on any website or receive emails.',
+      step3: 'Enter the address you just used here and click "Check Inbox" to see the emails.',
+    },
+    language: 'Language',
+    home: {
+      title: 'Your Exclusive, Unlimited, and Private Temporary Email',
+      subtitle: 'Enter any address ending in ',
+      subtitleAfter: ' to check the inbox right here.',
+      placeholder: 'Enter your temporary email address...',
+      copyTitle: 'Copy Address',
+      random: 'Generate Random',
+      checkInbox: 'Check Inbox',
+      inbox: 'Inbox',
+      refresh: 'Refresh',
+      loading: 'Loading...',
+      noMail: 'No mail yet',
+      selectMail: 'Please select an email to view',
+      from: 'From',
+      to: 'To',
+    }
+  },
+};
+
+const i18n = createI18n({
+  legacy: false, // 使用组合式 API
+  locale: 'zh', // 设置默认语言
+  fallbackLocale: 'en', // 设置回退语言
+  messages, // 设置语言环境信息
+});
+
+export default i18n;