refactor(components): refactor mutations-over-time-grid into generic features-over-time-grid

[fhennig]

This is working towards a new queries-over-time component, by refactoring the mutations-over-time-grid into a reusable component.

Summary

Rename MutationsOverTimeGrid to FeaturesOverTimeGrid and make it generic. You now need to also supply a:

FeatureRenderer<D> {
    asString(value: D): string;
    renderRowLabel(value: D): JSX.Element;
    renderTooltip(value: D, temporal: Temporal, proportionValue: ProportionValue | undefined): JSX.Element;
}

Rename MutationOverTimeMutationValue to ProportionValue as it's not mutation specific.

Screenshot

n/a

PR Checklist

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

[vercel]

The latest updates on your projects. Learn more about Vercel for GitHub.

Project	Deployment	Review	Updated (UTC)
dashboard-components	Error		Jan 15, 2026 9:22am

[github-actions]

There is no change in the changelog. This PR will not produce a new releasable version.

[fengelniederhammer]

LGTM

[fhennig]

re-running test - there were 3 failures.

[fhennig]

hmm weird, another test failure, definitely some flakiness going on, I'll need to investigate

[fhennig]

The tests were just flaky, unfortunately.