feat: fix backend sql error;fix frontend i18n display error

frontend/src/i18n/index.js

@@ -34,8 +34,13 @@ const messages = {
         deleteFailed: '删除邮件失败。',
         confirmClearAll: '确定要清空这个收件箱的所有邮件吗？此操作不可恢复。',
         clearFailed: '清空收件箱失败。',
+        generateRandomSuccess: '已生成随机邮箱地址',
+        checkInboxStart: '正在查询收件箱',
         copyFailed: '复制失败!',
+        copySuccess: '复制成功！',        // <-- 这里添加
         actionCancelled: '操作已取消',
+        deleteSuccess: '删除成功！',
+        clearSuccess: '收件箱已清空！',
       },
       newMailNotification: '收到新邮件！',
     }
@@ -73,8 +78,13 @@ const messages = {
         deleteFailed: 'Failed to delete email.',
         confirmClearAll: 'Are you sure you want to clear all emails in this inbox? This action cannot be undone.',
         clearFailed: 'Failed to clear inbox.',
+        generateRandomSuccess: 'Random email address generated',
+        checkInboxStart: 'Checking inbox',
         copyFailed: 'Copy failed!',
+        copySuccess: 'Copied successfully!',  // <-- 这里添加
         actionCancelled: 'Action cancelled',
+        deleteSuccess: 'Deleted successfully!',
+        clearSuccess: 'Inbox cleared!',
       },
       newMailNotification: 'New mail received!',
     }