[Feature] Collapsible chain of thought reasoning

[backstab5983]

Problem Description

Not having the CoT collapsible makes it confusing and hard to understand which part of an answer is the reasoning, and which part is the actual answer.

Proposed Solution

Make the CoT collapsible, this is already a feature on DeepSeek, Google AI Studio, ChatGPT, etc.

[SaturnTsen]

调用DeepSeek-R1的api时，标签的内的内容会被隐藏，可以添加一个配置项选择是否显示CoT吗？

[DeepJH]

我也是，希望能折叠