chore: e2e for validation ui

[maxy-shpfy]

Description

Added comprehensive test identifiers (data-testid attributes) to validation UI components and created end-to-end tests for pipeline validation functionality. The test identifiers enable reliable testing of validation groups, individual validation issues, input value fields, and info boxes. The new e2e test suite covers the complete validation workflow including error detection, issue expansion, navigation to problematic nodes, connecting components, creating input nodes, and resolving validation issues.

Type of Change

• New feature
• Improvement

Checklist

• I have tested this does not break current pipelines / runs functionality
• I have tested the changes on staging

Screenshots

Screen Recording 2026-02-22 at 9.31.57 PM.mov (uploaded via Graphite)

Test Instructions

1. Run the new e2e test suite: npm run test:e2e -- validation-ui.spec.ts
2. Verify that all validation UI interactions work as expected:
   • Create a new pipeline and add components
   • Check that validation errors appear for components with missing required inputs
   • Expand validation groups to see individual issues
   • Click on validation issues to navigate to the problematic nodes
   • Connect components and verify error count decreases
   • Create input nodes via CMD+drag and set values to resolve all issues
3. Ensure existing validation functionality remains unchanged

Additional Comments

The test identifiers are designed to be specific and descriptive, including variant information for info boxes and issue levels for validation items. The e2e tests use a serial execution mode to maintain state between test steps, simulating a realistic user workflow through the validation process.

[maxy-shpfy]

Warning

This pull request is not mergeable via GitHub because a downstack PR is open. Once all requirements are satisfied, merge this PR as a stack on Graphite.
Learn more

• chore: e2e for validation ui #1840 👈 (View in Graphite)
• chore: e2e test for sticky notes #1839
• chore: e2e for secrets in argument editor #1838
• chore: e2e for secrets management ui #1830
• fix: e2e tests failures #1828
• master

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