fix: Fix logic in span detail back

Fixes the inversed logic from #701

Author: BYK

.changeset/old-fans-brake.md

@@ -0,0 +1,8 @@
+---
+'@spotlightjs/spotlight': patch
+'@spotlightjs/electron': patch
+'@spotlightjs/overlay': patch
+'@spotlightjs/astro': patch
+---
+
+Fix span details modal resetting trace view tree state on close (for reals this time)

packages/overlay/src/ui/SidePanel/SidePanel.tsx

@@ -10,7 +10,7 @@ export type SidePanelProps = Omit<ComponentPropsWithoutRef<'div'>, 'className'>
 export function useGoBackWithFallback(fallback: string) {
   const navigateTo = useNavigate();
   const loc = useLocation();
-  return () => (loc.key === 'default' ? navigateTo(-1) : navigateTo(fallback, { replace: true }));
+  return () => (loc.key === 'default' ? navigateTo(fallback, { replace: true }) : navigateTo(-1));
 }
 
 export function SidePanelHeader({