Related Ticket

https://tree.taiga.io/project/penpot/issue/10263

Summary

Default value for shadows is null when should be an empty array.

Steps to reproduce

• Create board
• Access the shape's shadows via penpot.selection.shapes[id].shadows

Checklist

• Choose the correct target branch; use develop by default.
• Provide a brief summary of the changes introduced.
• Add a detailed explanation of how to reproduce the issue and/or verify the fix, if applicable.
• Include screenshots or videos, if applicable.
• Add or modify existing integration tests in case of bugs or new features, if applicable.
• Check CI passes successfully.
• Update the CHANGES.md file, referencing the related GitHub issue, if applicable.