✨ feat: Use current model to generate summary title

[davidreis97]

💻 变更类型 | Change Type

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

🔀 变更说明 | Description of Change

Use the current model to generate a summary title for the topic

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[MapleEve]

这个功能我记得在RFC里面有提到，是要用户在设置页自定义使用一个模型做标题自动生成
相同的产品比如NextChat一类经常被人诟病的问题就是用了很贵的模型（MJ，TTS一类）然后又被自动请求生成标题

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I remember this function was mentioned in the RFC. It requires users to customize the use of a model on the settings page to automatically generate titles.
The problem that is often criticized for the same products such as NextChat is that they use very expensive models (MJ, TTS, etc.) and are automatically requested to generate titles.

[arvinxx]

I think it's a good method to use current model to summary the topic.

But as @MapleEve said, there is a fee issue with this change. So I think this method can be a config for user to choose whether use fixed model or agent's model, or just disable it.

As for this PR. I'm glad to set it as the default option. But the code need some improvement for merge. And I'll add my review soon.

Before merging it, I think I need to add the mode config firstly.

[arvinxx]

the relative PR: #1902