[backport cloud/1.44] fix: preserve validation errors on execution start

[jaeone94]

Summary

Manual backport of #12493 to cloud/1.44.

Changes

• What: Preserve validation node errors and the error overlay when execution_start fires.
• What: Treat successful prompt node_errors as an object and keep queued job metadata tracking on that response path.
• What: Added the 1.44-adapted queuePrompt() unit regression from fix: preserve validation errors on execution start #12493.
• Dependencies: None.

Review Focus

This keeps the 1.44 storeJob({ id, nodes, workflow }) call shape instead of bringing over the newer promptOutput job metadata contract from 1.45/main.

Original PR: #12493

Test Plan

• pnpm test:coverage src/scripts/app.test.ts src/stores/executionStore.test.ts
• pnpm typecheck
• pnpm exec oxfmt --check src/scripts/app.test.ts src/scripts/app.ts src/stores/executionErrorStore.ts src/stores/executionStore.ts src/stores/executionStore.test.ts
• pnpm exec oxlint src/scripts/app.test.ts src/scripts/app.ts src/stores/executionErrorStore.ts src/stores/executionStore.ts src/stores/executionStore.test.ts --type-aware
• pnpm exec eslint --no-warn-ignored src/scripts/app.test.ts src/scripts/app.ts src/stores/executionErrorStore.ts src/stores/executionStore.ts src/stores/executionStore.test.ts

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Important

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Ignore keyword(s) in the title.

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• [release]
• [backport

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[github-actions]

🎨 Storybook: ✅ Built — View Storybook

Details

⏰ Completed at: 06/09/2026, 01:38:37 PM UTC

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[github-actions]

🎭 Playwright: ✅ 1550 passed, 0 failed · 2 flaky

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[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 2 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/scripts/app.ts	83.33%	2 Missing ⚠️

@@              Coverage Diff              @@
##             cloud/1.44   #12731   +/-   ##
=============================================
  Coverage              ?   58.92%           
=============================================
  Files                 ?     1415           
  Lines                 ?    72039           
  Branches              ?    19994           
=============================================
  Hits                  ?    42446           
  Misses                ?    29089           
  Partials              ?      504           

Flag	Coverage Δ
unit	58.92% <90.00%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/stores/executionErrorStore.ts	72.78% <100.00%> (ø)
src/stores/executionStore.ts	85.43% <100.00%> (ø)
src/scripts/app.ts	18.89% <83.33%> (ø)

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