[Bug]: Layout issue - Images are not displaying fully in the interactive classroom

### Bug Description

please check the following picture: Only images within the boundaries of the PowerPoint slide are displayed.

### Steps to Reproduce

1. select unpdf or minerU cloud, upload pdf file
2. covert the pdf file to classroom
3. check the generated classroom

### Expected Behavior

The layout automatically adjusts to ensure that images are displayed in full.

### Actual Behavior

Only part of the image shown.

### Deployment Method

Local development (npm run dev / pnpm dev / yarn dev)

### Browser

Microsoft Edge

### Operating System

deployed on Centos8, access in windows10

### Relevant Logs / Screenshots

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### Additional Context

_No response_