[Bug]: Sticky Notes Look Different Was Exported as SVG
### What happened?

When you export a file or selection that includes a sticky note, the sticky note doesn't look the same or as good as in app.

<img width="50%" src="https://github.com/user-attachments/assets/d1d466b9-679d-437b-8f46-b60753da2700"/>


### How can we reproduce the bug?

1. Create a file with a sticky note
2. Select the sticky note
3. Right click and export as SVG
4. Open the .svg in chrome or add it to a markdown file on github
5. The result: the file is missing the soft shadow and has a hard shadow.

Just to make sure SVG does support drop shadows, I made a recreation of the sticky note in Figma and it exported a nice clean SVG that used a filter for the drop shadow. So we know it's possible. See this gist with the Figma created sticky note and the Tldraw one:
https://gist.github.com/seflless/9924dea37ce8257d4cdb47c268ac82c1


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

_No response_

### Where did this happen?

The developer package

### Contact Details

_No response_

### Code of Conduct

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