feat: Enhance Keep-Alive configuration handling (#455)

locales/zh.json

@@ -123,6 +123,11 @@
     "maxTotalTimeoutDescription": "无论是否有进度通知的最大总超时时间（毫秒）",
     "resetTimeoutOnProgress": "收到进度通知时重置超时",
     "resetTimeoutOnProgressDescription": "适用于发送周期性进度更新的长时间运行操作",
+    "keepAlive": "保活配置",
+    "enableKeepAlive": "启用保活",
+    "keepAliveDescription": "定期发送 ping 请求以维持连接。适用于可能超时的长期连接。",
+    "keepAliveInterval": "间隔时间（毫秒）",
+    "keepAliveIntervalDescription": "保活 ping 的时间间隔（默认：60000毫秒 = 1分钟）",
     "remove": "移除",
     "toggleError": "切换服务器 {{serverName}} 状态失败",
     "alreadyExists": "服务器 {{serverName}} 已经存在",
@@ -789,4 +794,4 @@
     "internalErrorMessage": "处理 OAuth 回调时发生意外错误。",
     "closeWindow": "关闭窗口"
   }
-}
+}