ServerKey's keyed <Show> remount is a multi-second synchronous cascade (dispose + rebuild of the whole app subtree) that used to leave the UI looking frozen. A tiny module-level serverSwitching signal now gates a fullscreen Splash rendered above the ServerKey boundary, and the status-popover click handler setTimeout-defers the batched navigate+setActive so the browser paints the splash before the freeze begins and dismisses it after the new subtree paints.
LukeParkerDev
bff9e576b7