fix: jump to running notebook cells only

[kjgoodrick]

📝 Summary

When code-mode execution adds runtime-only running entries, the jump-to-running-cell action could select an id with no notebook DOM node and fail to scroll.

Select running cells from notebook order instead, and add a regression test covering a runtime-only running entry before a visible running notebook cell.

Closes #9706

jump-to-running-cell-wide.mp4

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✅ Merge Checklist

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• Tests have been added for the changes made.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	May 28, 2026 2:11am

[Copilot]

Pull request overview

This PR fixes the “Jump to running cell” behavior by ensuring the jump target is chosen from the notebook’s ordered cell list (DOM-backed cells) rather than from runtime state entries that may include runtime-only IDs.

Changes:

• Update notebookScrollToRunning() to select the first "running" cell from cellIds.inOrderIds instead of iterating over cellRuntime entries.
• Add a regression test covering the scenario where a runtime-only running entry exists before a visible running notebook cell.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
frontend/src/core/cells/actions.ts	Selects the running cell by notebook order to avoid runtime-only IDs with no DOM node.
frontend/src/core/cells/tests/actions.test.ts	Adds a regression test ensuring the action scrolls to the visible running cell even when runtime-only running state exists.

[Light2Dark]

thanks!

[github-actions]

🚀 Development release published. You may be able to view the changes at https://marimo.app?v=0.23.9-dev19