[Bug] [SSH workspace] 连接启用多因子认证(MFA/keyboard-interactive)的服务器必然失败:"SSH 认证失败"

提交前确认 · Pre-submission checklist

• 我已搜索过现有 issue，确认这不是重复 / I searched existing issues and confirmed this isn't a duplicate.
• 我已阅读 CONTRIBUTING.md / I've read CONTRIBUTING.md.

问题类别 · Category

文件 / 项目操作 · File / Project ops

涉及的 Agent 框架 · Agent framework

ZCode Agent（自研）

严重程度 · Severity

阻塞使用 · Blocking (无法使用核心功能 / core function unusable)

复现频率 · Reproducibility

必现 · Always

问题描述 · Description

连接启用了双因子认证的服务器(sshpd 配置 AuthenticationMethods publickey,keyboard-interactive,
)时,公钥认证实际已被服务器接受,但 ZCode 随后必然报
"SSH 认证失败:请检查用户名、密码或私钥配置",无法进入任何交互输入环节。

复现步骤 · Steps to reproduce

任意 sshd 配置 AuthenticationMethods publickey,keyboard-interactive + PAM OTP 模块即可复现,
无需特定服务器。

期望表现 · Expected behavior

1. ssh2 连接配置支持 keyboard-interactive:收到 info-request 时弹 UI 让用户输入一次性验证码,
   支持失败重试与多轮提示;
2. 顺带建议:SSH workspace 支持 ~/.ssh/config(IdentityFile/Port/ProxyJump/ControlMaster)
   与 ssh-agent,与系统 ssh 行为对齐。

实际表现 · Actual behavior

[ERROR] client error: {"name":"Error","message":"SSH 认证失败:请检查用户名、密码或私钥配置", "stack":"... at normalizeSSHConnectError (chunk-HTIMU6TZ.js) at Client.onClientError at doNextAuth (app.asar/node_modules/ssh2/lib/client.js:865) at tryNextAuth (client.js:1080) at USERAUTH_FAILURE (client.js:428) ..."}

ZCode 版本 · ZCode version

ZCode 桌面端 3.8.1.5310

设备 / 系统 / 浏览器 · Device / OS / Browser

Windows 10/11 x64

截图 / 录屏 / 日志 · Screenshots / Recordings / Logs

No response

Start with the SSH connection flow around normalizeSSHConnectError and the ssh2 Client.onClientError, doNextAuth, and tryNextAuth frames named in the log. Reproduce against an sshd using publickey,keyboard-interactive and trace the authentication prompts. Done means the workspace presents OTP prompts, supports retries and multiple rounds, and no longer reports a generic authentication failure after public-key acceptance.