fix: update DataTable sorting for zero values

[joshblack]

Changelog

New

N/A

Changed

• DataTable now treats 0 as a populated value when sorting numeric columns.

Removed

N/A

Rollout strategy

• Patch release
• Minor release
• Major release; if selected, include a written rollout or migration plan
• None; if selected, include a brief description as to why

Testing & Reviewing

• npx vitest run packages/react/src/DataTable/__tests__/DataTable.test.tsx
• npm run type-check

Merge checklist

• Added/updated tests
• Added/updated documentation
• Added/updated previews (Storybook)
• Changes are SSR compatible
• Tested in Chrome
• Tested in Firefox
• Tested in Safari
• Tested in Edge
• (GitHub staff only) Integration tests pass at github/github-ui (Learn more about how to run integration tests)

[changeset-bot]

🦋 Changeset detected

Latest commit: 00f21af

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@primer/react	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions]

⚠️ Action required

👋 Hi, this pull request contains changes to the source code that github/github-ui depends on. If you are GitHub staff, test these changes with github/github-ui using the integration workflow. Check the integration testing docs for step-by-step instructions. Or, apply the integration-tests: skipped manually label to skip these checks.

To publish a canary release for integration testing, apply the Canary Release label to this PR.

[Copilot]

Pull request overview

Fixes a DataTable sorting bug where numeric 0 values were treated as blank (because of a truthiness check), causing them to sort alongside null/undefined/'' instead of being ordered as numeric values.

Changes:

• Replace truthy checks on sort values with an explicit isBlankValue helper that only treats null/undefined/'' as blank.
• Update existing sort test to include a 0 row and add a new test asserting 0 sorts as a numeric value in both directions.
• Add a patch changeset.

Show a summary per file

File	Description
packages/react/src/DataTable/useTable.ts	Introduce isBlankValue and use it in the sort comparator instead of truthy checks.
packages/react/src/DataTable/tests/DataTable.test.tsx	Extend existing sort test with a 0 row and add a dedicated test for zero values.
.changeset/datatable-zero-sorting.md	Patch changeset describing the fix.

Copilot's findings

• Files reviewed: 3/3 changed files
• Comments generated: 0

[primer-integration]

👋 Hi from github/github-ui! Your integration PR is ready: https://github.com/github/github-ui/pull/20875

[primer-integration]

Integration test results from github/github-ui:

CI Passed
VRT Passed
Projects Passed

All checks passed!