navigateBack

Navigate back in the navigation stack.

No-op unless the state can currently accept a back, which is the same question the gesture and platform-back paths ask through canHandleBack. Back navigation is refused while a LoadingModal is the current entry, and while bootstrap is unresolved or an async guard or entry evaluation is in flight, unless the current entry is a RenderLayer.SYSTEM entry raised over that work. The evaluation commits deltas against the stack as it is when it lands, so an alert leaving from on top of it is harmless, whereas the screens beneath are what it is about to replace and must stay put.

Dispatches NavigationAction.Back directly, bypassing the navigation mutex. This is intentional: a back/dismiss requires no guard evaluation, and the mutex may be held while a loading modal is showing (e.g. during guard evaluation). Routing through evaluateAndExecute would needlessly serialize the dismiss behind the in-flight evaluation.