add a html slot on the right side of a stat plugin

[Light2Dark]

📝 Summary

New API:

    mo.stat(
        "$20",
        label="Marketing spend",
        slot=mo.md("Hello!"),
    ),

🔍 Description of Changes

📋 Checklist

• I have read the contributor guidelines.
• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• I have added tests for the changes made.
• I have run the code and verified that it works as expected.

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Project	Deployment	Preview	Comments	Updated (UTC)
marimo-docs	Ready	Preview	Comment	Dec 6, 2025 2:01pm

[mscolnick]

cc @dmadisetti , @akshayka for API change

[Light2Dark]

TIL you can control styles for elements inside a shadow root by:

• using custom properties OR
• style queries

shadow dom video