fix label not being passed through for mo.ui.tabs

[Light2Dark]

📝 Summary

Closes #9186

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Apr 14, 2026 10:25am

[Copilot]

Pull request overview

Fixes mo.ui.tabs(..., label=...) not rendering its label in the frontend by ensuring the plugin’s validated data includes label and wrapping the rendered tabs with the shared Labeled component.

Changes:

• Extend TabsPlugin data/validator schema to include label.
• Render the label via Labeled with top alignment around the tabs UI.

[Copilot]

Wrapping Tabs with Labeled without fullWidth causes the labeled container to render as inline-flex with w-fit (see Labeled), which can shrink the tabs width when a label is present and potentially change layout/overflow behavior compared to the unlabeled case. Consider setting fullWidth={true} (or otherwise ensuring the wrapper is w-full/block) so adding a label doesn’t alter the tabs’ sizing.

Suggested change

	<Labeled label={label} align="top">
	<Labeled label={label} align="top" fullWidth={true}>

[kirangadhave]

not the biggest fan of the tabs being labeled, it just looks weird. But it's consistent.

do we know if the label get's passed aria-labelledby?

[Light2Dark]

not the biggest fan of the tabs being labeled, it just looks weird. But it's consistent.

The nice thing is you can use markdown in the label, so can do label="## Label" and stuff, but yeah I get it feels weird.

do we know if the label get's passed aria-labelledby?

Under the hood Labeled uses Radix's Label, so yeah I think it does