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* test(perf): add a settled layout-shift counter to the J1 launch journey renderer.layoutShiftScore stops at the first-card cutoff, so the dashboard shift fixed in #1738 (about 0.23, roughly 15 ms after the first card) read as 0. renderer.layoutShiftScoreSettled sums the same non-input layout-shift entries until the workspace content has been quiet for 500 ms, capped at 3 s after the cutoff. The first-card counter is unchanged. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * test(perf): attribute late layout shifts and record the first measurement evidence.settle.lateShifts lists the counted shifts after the first-card cutoff with the nodes the browser attributes them to. On master the settled score is 0.236: the recent-sources rail moves up 316 px about 12 ms after the first card and back down shortly after, a flicker #1738 did not cover. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * test(perf): end the settle window at its scheduled deadline A cap or quiet timer delayed by a busy main thread used the moment it ran as the settle point, so shifts after the 3 s cap could enter the settled counter. The settle point is now the deadline the timer was scheduled for. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> * docs(perf): record the runner's settled layout-shift measurement Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> --------- Co-authored-by: 4gray <fourgray@proton.me> Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>