The 454c4bb2 kiosk flattening only covered the Dashboard's background
stack, but the kiosk boots into the login/onboarding screen —
OnboardingWrapper.vue — whose scoped 3D stack (perspective +
preserve-3d bg layers + mix-blend-mode glitch overlays) has the exact
compositing pattern that fails to repaint under the kiosk's software
compositor, leaving the black body fill visible. Extend the same
html.kiosk-mode flattening to this screen via :global() rules: 2D
opacity crossfades stay, 3D transforms / blur filters / blend-mode
glitch layers go.
Also raise the kiosk chromium JS heap cap 128→256MB: the intro
cinematic (video + audio + app) inside a 128MB V8 old-space risks
renderer OOM, and a crashed kiosk tab auto-reloads — indistinguishable
from the reported "flickers and refreshes".
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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