✨ [Feature]: 页面预览代码格式化

### What problem does this feature solve

页面预览与本地出码格式化行为不一致，页面预览没有格式化，建议格式化
<img width="2226" height="1154" alt="Image" src="https://github.com/user-attachments/assets/bfcfaae2-e8ab-4274-8f84-3c06daaa7888" />

### What does the proposed API look like

与本地出码格式一致

### What is your project name

tiny-engine