[Bug]: Text inside shapes gets offest down when exported
### What happened?

When a tldraw canvas with text inside shapes gets exported (either as svg or png) the text is offset to the bottom of the shape and often overlaps with the shape border.

The canvas before export:
![Image](https://github.com/user-attachments/assets/923e65cd-c4de-4858-ab1b-23bbada644e1)

The exported image:
<img width="202" alt="Image" src="https://github.com/user-attachments/assets/ab11609a-83f6-447f-834c-8d729deb73fe" />

### How can we reproduce the bug?

Create a shape with text inside and export it.

### What browsers are you seeing the problem on?

Firefox

### Where did this happen?

The tldraw.com website

### Contact Details

_No response_

### Code of Conduct

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