[Feature]: The generated courseware can be optimized through multiple conversations.

### Problem or Motivation

Now I encounter a problem: the generated courseware does not meet my needs in some parts, and I want to modify and optimize it, but the PPT has already been generated and I cannot let the AI optimize and iterate on it.

### Proposed Solution

I hope we can add conversations to optimize and iterate on the generated PPT.

### Alternatives Considered

_No response_

### Area

Classroom generation

### Additional Context

_No response_