Org stays selected after page refresh and viewer loads cleanly on switch
Three related issues when switching between organizations are now resolved.
Org selection no longer resets on refresh. Previously, switching to a different org and then refreshing the page would drop you back to your default org. Your last selected org is now remembered, so you land where you left off. If you navigate directly with a bookmarked URL that includes an org parameter, that selection also persists correctly after refresh.
The viewer no longer flashes a previous org's location while loading. When switching orgs, the viewer would sometimes briefly render a cached location from the org you just left before loading the correct one. The viewer now shows a loading state until your new org's data is ready, and any pinned location or active tab from the previous org is cleared at the point of switching.
The sign-in page respects your system's light or dark mode preference. The left-panel illustration, logo, and tagline on the sign-in screen were previously hardcoded to dark mode. They now switch correctly based on your display settings.