Fix editor schedule E2E flakes

[MaggieCabrera]

Part of Gutenberg-on-WPCOM v23.5.1 rotation.

Proposed Changes

• Match only the canonical post/page save response in EditorPage.publish(), so publish waits do not accidentally capture child endpoints such as autosaves.
• Skip Calypso shell/sidebar stabilization when editor__schedule.ts authenticates the second user before immediately navigating to the published post URL.

Why are these changes being made?

• The Atomic Edge desktop schedule test could catch a publish-time child REST response that does not include the published article link, causing No published article URL found in response.
• The Atomic Edge mobile schedule test was waiting for a dashboard sidebar during a step that only needs authenticated cookies before navigating to public content.

Testing Instructions

• git diff --check
• ESLINT_USE_FLAT_CONFIG=false node .yarn/releases/yarn-4.0.2.cjs eslint packages/calypso-e2e/src/lib/pages/editor-page.ts test/e2e/specs/editor/editor__schedule.ts
• node .yarn/releases/yarn-4.0.2.cjs workspace @automattic/calypso-e2e build
• Atomic Edge desktop: CALYPSO_BASE_URL=https://wordpress.com TEST_ON_ATOMIC=true GUTENBERG_EDGE=true AUTHENTICATE_ACCOUNTS=defaultUser HEADLESS=true JEST_E2E_WORKERS=1 node ../../.yarn/releases/yarn-4.0.2.cjs test specs/editor/editor__schedule.ts — 16/16 passed.
• Atomic Edge mobile: CALYPSO_BASE_URL=https://wordpress.com TEST_ON_ATOMIC=true GUTENBERG_EDGE=true VIEWPORT_NAME=mobile AUTHENTICATE_ACCOUNTS=defaultUser HEADLESS=true JEST_E2E_WORKERS=1 node ../../.yarn/releases/yarn-4.0.2.cjs test specs/editor/editor__schedule.ts — 16/16 passed.
• Simple Edge desktop: CALYPSO_BASE_URL=https://wordpress.com GUTENBERG_EDGE=true AUTHENTICATE_ACCOUNTS=gutenbergSimpleSiteEdgeUser,defaultUser HEADLESS=true JEST_E2E_WORKERS=1 node ../../.yarn/releases/yarn-4.0.2.cjs test specs/editor/editor__schedule.ts — 16/16 passed.
• Simple Edge mobile: CALYPSO_BASE_URL=https://wordpress.com GUTENBERG_EDGE=true VIEWPORT_NAME=mobile AUTHENTICATE_ACCOUNTS=gutenbergSimpleSiteEdgeUser,defaultUser HEADLESS=true JEST_E2E_WORKERS=1 node ../../.yarn/releases/yarn-4.0.2.cjs test specs/editor/editor__schedule.ts — 16/16 passed.
• Self-hosted Jetpack is not applicable to this spec: the repository has no supported remote-site editor/schedule suite exercising these paths. A manual JETPACK_TARGET=remote-site attempt stopped in the WPCOM-specific editor-load heuristic before reaching the publish response matching changed here.

Pre-merge Checklist

• Has the general commit checklist been followed? (PCYsg-hS-p2)
• Have you written new tests for your changes?
• Have you tested the feature in Simple (P9HQHe-k8-p2), Atomic (P9HQHe-jW-p2), and self-hosted Jetpack sites (PCYsg-g6b-p2)?
• Have you checked for TypeScript, React or other console errors?
• For UI changes, have you tested the affected components in dark mode?
• Have you tested accessibility for your changes? Ensure the feature remains usable with various user agents (e.g., browsers), interfaces (e.g., keyboard navigation), and assistive technologies (e.g., screen readers) (PCYsg-S3g-p2).
• Have you used memoizing on expensive computations? More info in Memoizing with create-selector and Using memoizing selectors and Our Approach to Data
• Have we added the "[Status] String Freeze" label as soon as any new strings were ready for translation (p4TIVU-5Jq-p2)?
  • For UI changes, have we tested the change in various languages (for example, ES, PT, FR, or DE)? The length of text and words vary significantly between languages.
• For changes affecting Jetpack: Have we added the "[Status] Needs Privacy Updates" label if this pull request changes what data or activity we track or use (p4TIVU-aUh-p2)?

[github-actions]

Calypso Live (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-188429

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https://calypso.live?image=registry.a8c.com/calypso/app:build-188429&env=jetpack

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https://calypso.live?image=registry.a8c.com/calypso/app:build-188429&env=a8c-for-agencies

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https://calypso.live?image=registry.a8c.com/calypso/app:build-188429&env=dashboard

Dashboard Live (A4A) (direct link)

https://calypso.live?image=registry.a8c.com/calypso/app:build-188429&env=dashboard-a4a

[github-actions]

Looks like one of the E2E tests has failed.

You can fix them following these steps:

1. Check out this branch locally:

   gh pr checkout 112465

2. Start Claude Code in the repo:

   claude

3. Run the /fix-e2e-tests skill, passing this PR number:

   /fix-e2e-tests 112465
   

[matticbot]

This PR does not affect the size of JS and CSS bundles shipped to the user's browser.

Generated by performance advisor bot at iscalypsofastyet.com.

[MaggieCabrera]

This PR might not be needed anymore, since the tests are passing, but I'll leave it here in case it reoccurs