#31572 test(hibernation): quarantine theWokenPageKeepsItsPictureUntilItPaints (#31548)

What failed: HibernationWakeCoverTests.theWokenPageKeepsItsPictureUntilItPaints() failed on the feat-cmux-next tip Swift suite in https://github.com/manaflow-ai/cmux/actions/runs/41358792657.

✘ Test theWokenPageKeepsItsPictureUntilItPaints() recorded an issue at HiddenPageHibernationTests.swift:448:17: Expectation failed: await condition()
↳ the page painted and its picture went never happened

It was green in the 7 earlier tip runs we have.

Cause: likely environment. Nothing in the wake cover path changed since the last green head (WebKitTab+WakeStandIn.swift, WebKitFirstPaintHandler.swift, BrowserHibernation*). The only hibernation commits in the range are #27047 and #31302, and both cover agent chat pages. The cover goes away on the page's first contentful paint. The rig's window is never ordered on screen, so on an occluded or locked console WebKit may never render and never report the paint. Details and the fix to try are in #31548.

Fix: quarantine with .disabled("Quarantined: ..., #31548"). The test is not deleted. #31548 asks for the rig window to be ordered front, or for the test to be gated on an awake display, and then for the quarantine to come off.

Risk: low. Test-only, one line. Its sibling tests (theCoverHasItsPictureInTheSwapsOwnTurn, thePictureGoesAtTheCapWhenThePageHasNotPainted) stay on. Small.

Agent session: agent session

🤖 Generated with Claude Code

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Summary by cubic

Quarantines theWokenPageKeepsItsPictureUntilItPaints so the Swift suite stops failing on feat-cmux-next. The test failed on a CI Mac when the woken page's first contentful paint was never reported within the rig's idle-poll budget, likely because the rig window is never on screen. Nothing in the wake cover path changed since its last green run. The test is disabled, not deleted; #31548 tracks the fix and the quarantine removal.