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4grayandClaude Opus 5.5
67cf84f490
Leaving an Xtream portal section for the dashboard inserted the dashboard below the still-present portal page: the @angular/animations renderer queues every DOM removal until the end of the next change detection, while the router inserts the new page at once. With event coalescing that tick runs in the next requestAnimationFrame, so Chromium laid the document out with both pages (the dashboard at y=720 in a 720 px window) and scored the swap as one layout shift: 0.337 at 1280 px, 0.394 at 900 px, 0.723 at 420 px, sources lib-workspace-dashboard-rails. Nothing uses @angular/animations triggers (Material animates with CSS), so the app no longer provides provideAnimations(). The old page now leaves in the same microtask, before the new one is inserted, and the swap records no shift. The router itself was already atomic: NavigationEnd and the shell's currentUrl follow activation synchronously. app.config.spec.ts keeps the animations renderer out; workspace-route-swap.e2e.ts asserts that no mutation checkpoint holds both pages and that neither the dashboard nor the content pane shifts. Both fail with provideAnimations() restored. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>