[BUG] claude -r 恢复历史会话时，默认不用配置文件里的自定义模型，导致400

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

配置文件如下图

<img width="1350" height="879" alt="Image" src="https://github.com/user-attachments/assets/89629320-7de2-4628-a41c-9efde8b5fb00" />

当我新开session时，默认会用配置文件里的模型

<img width="2070" height="1492" alt="Image" src="https://github.com/user-attachments/assets/d23c02f6-533f-4364-b07c-8a888d0afb8f" />

当我用claude -r恢复历史session的时候，默认模型缺少ppio字符串，导致400不能用，必须手动切换模型

<img width="2223" height="1160" alt="Image" src="https://github.com/user-attachments/assets/4c14b407-0354-4562-8303-70686bfedad0" />

随后报错

<img width="1535" height="507" alt="Image" src="https://github.com/user-attachments/assets/b9a85df9-25b3-42da-a5df-8348a8ee166c" />

有趣的是，当我先输入claude命令进入终端，再输入/resume 命令，则没有此bug，如下图所示

<img width="2084" height="535" alt="Image" src="https://github.com/user-attachments/assets/f05a994e-8a2f-4a14-a0d9-32d328220a11" />

What Should Happen?

....

Error Messages/Logs

Steps to Reproduce

如上图描述

Claude Model

None

Is this a regression?

Yes, this worked in a previous version

Last Working Version

2.1.119

Claude Code Version

2.1.150 (Claude Code)

Platform

Other

Operating System

Windows

Terminal/Shell

PowerShell

Additional Information

_No response_