The static :root fallback for --sun-ui-*/--sun-sidebar-* hardcodes the
"Standard Purple" preset (SIDEBAR_STANDARD's exact values). Any
workspace that has actually saved a different theme only gets it
applied once app-runtime.js's brand-theme module loads and runs
applyActual(), which reads the same localStorage cache
(sunBrandThemeV1) it always did - but by then the purple/mixed
defaults have already painted, so every load flashes the wrong colors
before snapping to the real ones.
Reads the same localStorage key synchronously in the
sun-startup-stability-guard script (already first in <head>, before
any stylesheet or the app-runtime.js bundle loads) and sets the same
CSS custom properties as inline styles on <html>. Inline element
styles always win over a stylesheet's :root selector regardless of
load order, so the correct theme is already active for the very first
paint. Workspaces with no saved theme yet are unaffected - the
existing static fallback still shows, same as today.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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