[Feature]关于小组讨论的个人建议

### Problem or Motivation

我在看小组讨论 语言文字太过快 特别是一些思考问题根本读不完 也不能暂停

### Proposed Solution

希望可以像颗件那样支持上/下一个 可以播放语言

### Alternatives Considered

_No response_

### Area

Classroom generation

### Additional Context

_No response_

Start by locating the Classroom generation group-discussion interface and reading how discussion text is currently presented and played. Check whether the existing player supports pausing or moving between items. Done means users can pause playback, move to the previous or next discussion item, and play the discussion text as audio.

Written by the indexing model from the issue text.