fix(components): reselecting a removed lineage chip now works

[fhennig]

Closes #1125

Summary

After removing a chip from the multi-select lineage filter, downshift's internal selectedItem still held the removed value, so clicking that same item again produced no state change and no event. Resetting selectedItem to null in the stateReducer after each selection clears this stale reference.

Adds a regression story MultiSelectReselectAfterRemove that reproduces the original failure sequence.

PR Checklist

• All necessary documentation has been adapted.
• The implemented feature is covered by an appropriate test.

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Project	Deployment	Actions	Updated (UTC)
dashboard-components	Ready	Preview, Comment	Jul 1, 2026 11:26am

[fhennig]

Claude:

The real fix (4 lines):

1. Destructure selectItem from the useCombobox return value
2. In the chip's × button onClick, call selectItem(null) after removeSelectedItem

Why 100 lines in the diff:

• ~50 lines is the new MultiSelectReselectAfterRemove story (the regression test)
• A few lines are Prettier reformatting the onClick from a one-liner to a multi-line arrow function
• The selectedItem: null addition and removal from the stateReducer cancel each other out (that was the wrong fix, then reverted via amend)

So if you look at downshift-combobox.tsx alone, it's about 5 changed lines. The rest is the test story.

[Copilot]

Pull request overview

Fixes a Downshift multi-select edge case in the lineage filter where removing a selected chip could leave Downshift’s internal selectedItem pointing at the removed value, preventing re-selection of that same option. Adds a Storybook interaction story to reproduce and guard against the regression.

Changes:

• Reset Downshift combobox selectedItem when a chip is removed in the multi-select combobox.
• Add a regression Storybook play scenario that removes a lineage chip and then re-selects it from the dropdown.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.

File	Description
components/src/preact/components/downshift-combobox.tsx	Clears Downshift selection state after removing a selected chip in the multi-select combobox.
components/src/preact/lineageFilter/lineage-filter.stories.tsx	Adds an interaction story covering “remove then reselect” for the multi-select lineage filter.

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[Copilot]

Pull request overview

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