fix: Validate column names when saving dashboard tiles

[fleon]

Similar to #1597, verify column names for validation errors when saving dashboard tiles too.

CleanShot.2026-01-16.at.13.32.07.mp4

[changeset-bot]

🦋 Changeset detected

Latest commit: 701d064

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

This PR includes changesets to release 2 packages

Name	Type
@hyperdx/app	Patch
@hyperdx/api	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

[vercel]

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

Project	Deployment	Review	Updated (UTC)
hyperdx-v2-oss-app	Ready	Preview, Comment	Jan 16, 2026 0:34am

[claude]

PR Review

✅ No critical issues found.

The implementation correctly adds metric name validation to the save flow (matching the existing play button validation from PR #1597). The code follows established patterns:

• Extracted validateMetricNames helper function for reusability ✓
• Properly validates metric sources with empty metricName when metricType is set ✓
• Test coverage includes save button validation scenario ✓
• Dependencies correctly updated in handleSave useCallback ✓

Minor observations (non-blocking):

• Test uses mocked components which is consistent with existing test patterns
• Validation logic appropriately returns early to prevent save when validation fails

[fleon]

@pulpdrew Similar to #1597, but for saving dashboard tiles. Abstracts the logic in a common function too.

cc @teeohhem

[github-actions]

E2E Test Results

✅ All tests passed • 60 passed • 4 skipped • 778s

Status	Count
✅ Passed	60
❌ Failed	0
⚠️ Flaky	1
⏭️ Skipped	4

Tests ran across 4 shards in parallel.

View full report →

[pulpdrew]

LGTM