fix: fix model undefied

[Jandiasnow]

💻 变更类型 | Change Type

• ✨ feat
• 🐛 fix
• ♻️ refactor
• 💄 style
• 🔨 chore
• 📝 docs

🔀 变更说明 | Description of Change

解决模型只有一个 model 时，编辑智能体 model undefined 的问题 close: #326

📝 补充信息 | Additional Information

[yunti-bot]

👍 @Jandiasnow


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[yunti-bot]

❤️ Great PR @Jandiasnow ❤️


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