feat(delta): add clear selection button for Event Deltas heatmap

[alex-fedotyev]

Summary

Adds a clear-selection affordance to Event Deltas and ensures clearing selection resets both the comparison mode and the heatmap's visual selection overlay.

What's included

• DBDeltaChart
  • Adds onClearSelection callback prop
  • Shows IconX clear button in legend while selection is active
• DBSearchHeatmapChart
  • Wires clear action to reset xMin/xMax/yMin/yMax
  • Uses a clearSelectionVersion signal for chart-side visual reset
  • Ensures table filter actions also trigger selection clear
• DBHeatmapChart
  • Accepts clearSelectionVersion
  • Clears local selection UI and persisted uPlot selection rectangle when clear is triggered

Follow-up CI fix

• Removed a duplicate clearSelection declaration introduced during branch consolidation, which caused TypeScript/lint failures.

How to test

1. In Event Deltas, drag to select an area on the heatmap.
2. Confirm distribution switches to Selection/Background mode and clear (X) is visible.
3. Click clear (X) or apply include/exclude from a distribution bar.
4. Confirm:
   • selection coordinates are cleared
   • distribution returns to all spans mode
   • heatmap visual selection rectangle/popover is cleared

References

• Linear: HDX-3693

Linear Issue: HDX-3693

  

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Latest commit: 7436e12

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Project	Deployment	Actions	Updated (UTC)
hyperdx-oss	Ready	Preview, Comment	Mar 23, 2026 4:37pm

[github-actions]

Knip - Unused Code Analysis

⚪ 0 change in total issues (240 on main → 240 on PR)

Category	main	PR	Diff
Unused files	9	9	0
Unused dependencies	14	14	0
Unused devDependencies	20	20	0
Unlisted dependencies	14	14	0
Unresolved imports	2	2	0
Unlisted binaries	2	2	0
Unused exports	132	132	0
Unused exported types	41	41	0
Unused enum members	2	2	0
Duplicate exports	4	4	0

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[github-actions]

E2E Test Results

✅ All tests passed • 91 passed • 3 skipped • 979s

Status	Count
✅ Passed	91
❌ Failed	0
⚠️ Flaky	2
⏭️ Skipped	3

Tests ran across 4 shards in parallel.

View full report →

[alex-fedotyev]

@elizabetdev - where do you think it is the best place for button "X" to clear the selection for comparison?