Electron Releases

Description of Change

The hidden titleBarOverlay regression starts six cold Electron processes sequentially. They currently share a 30-second test deadline, even though each fixture allows 10 seconds after app readiness and also needs time for startup and shutdown. On a slow host, a timed-out attempt can leave its child running while the next attempt starts.

Replace the local subprocess helper with the existing spawnAndWait helper. Give each child a 20-second deadline and 5 seconds for graceful termination before escalation, and derive the enclosing test deadline from all six child budgets plus cleanup headroom. Wait for process and pipe closure, and retain stdout/stderr in failure diagnostics.

All six cold launches and their exit-code assertions remain. The fixture still requires ready-to-show within its existing 10-second deadline. This changes only one spec; no production code, shared helpers, or build configuration changes.

Validation

• Local incremental Electron build passed on this branch: autoninja --offline -C out/Testing electron.
• Focused hidden-overlay tests passed against that build on Linux x64/X11: 2 passed, no retries, including the six cold-process launches and the related navigation/rendering regression.
• Targeted JavaScript lint, formatting, and the full spec TypeScript check passed.

The full test suite and Windows/macOS execution remain for CI.

Checklist

• I have built and tested this change
• I have filled out the PR description
• I have reviewed and verified the changes
• npm test passes
• tests are changed or added

Release Notes

Notes: none