🐛 fix: fix custom max_token not saved via customModelCards form

[hezhijie0327]

💻 变更类型 | Change Type

• ✨ feat
• 🐛 fix
• ♻️ refactor
• 💄 style
• 👷 build
• ⚡️ perf
• 📝 docs
• 🔨 chore

🔀 变更说明 | Description of Change

修复自定义模型更改 max_token 未生效的问题

问题复现：

1. 创建/修改自定义模型
2. 修改最大 Token 数量
3. 保存设置

📝 补充信息 | Additional Information

Before	After

[vercel]

@hezhijie0327 is attempting to deploy a commit to the LobeHub Team on Vercel.

A member of the Team first needs to authorize it.

[lobehubbot]

👍 @hezhijie0327

Thank you for raising your pull request and contributing to our Community
Please make sure you have followed our contributing guidelines. We will review it as soon as possible.
If you encounter any problems, please feel free to connect with us.
非常感谢您提出拉取请求并为我们的社区做出贡献，请确保您已经遵循了我们的贡献指南，我们会尽快审查它。
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.12%. Comparing base (ea7e732) to head (1c7b9db).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##             main    #5226     +/-   ##
=========================================
  Coverage   92.12%   92.12%             
=========================================
  Files         570      570             
  Lines       43517    43517             
  Branches     2556     3890   +1334     
=========================================
  Hits        40089    40089             
  Misses       3428     3428             

Flag	Coverage Δ
app	92.12% <ø> (ø)
server	97.66% <ø> (ø)

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[lobehubbot]

❤️ Great PR @hezhijie0327 ❤️

The growth of project is inseparable from user feedback and contribution, thanks for your contribution! If you are interesting with the lobehub developer community, please join our discord and then dm @arvinxx or @canisminor1990. They will invite you to our private developer channel. We are talking about the lobe-chat development or sharing ai newsletter around the world.
项目的成长离不开用户反馈和贡献，感谢您的贡献! 如果您对 LobeHub 开发者社区感兴趣，请加入我们的 discord，然后私信 @arvinxx 或 @canisminor1990。他们会邀请您加入我们的私密开发者频道。我们将会讨论关于 Lobe Chat 的开发，分享和讨论全球范围内的 AI 消息。

[lobehubbot]

🎉 This PR is included in version 1.42.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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