Merge pull request #89295 from Expensify/claude-fixMagicLinkNavigationReset

Skip prepending TabNavigator for public screens in navigation state

(cherry picked from commit 52e86b7)

(cherry-picked to staging by luacmartins)

Author: luacmartins

src/libs/Navigation/helpers/getAdaptedStateFromPath.ts

@@ -34,6 +34,23 @@ const getRoutesWithIndex = (routes: NavigationPartialRoute[]): PartialState<Navi
 /** All tab routes derived from the shared TAB_SCREENS constant. */
 const TAB_NAVIGATOR_ROUTES: NavigationPartialRoute[] = TAB_SCREENS.map((name) => ({name}));
 
+/**
+ * Screens that are registered in PublicScreens (unauthenticated navigator) and should not
+ * have TabNavigator prepended, because when the user is unauthenticated TabNavigator does
+ * not exist in the navigator tree and the RESET action would fail.
+ *
+ * Keep in sync with the screens registered in PublicScreens.tsx (excluding SCREENS.HOME,
+ * which doubles as the authenticated home tab, and navigator entries).
+ */
+const PUBLIC_SCREENS = new Set<string>([
+    SCREENS.VALIDATE_LOGIN,
+    SCREENS.TRANSITION_BETWEEN_APPS,
+    SCREENS.CONNECTION_COMPLETE,
+    SCREENS.BANK_CONNECTION_COMPLETE,
+    SCREENS.UNLINK_LOGIN,
+    SCREENS.SAML_SIGN_IN,
+]);
+
 /**
  * Builds TabNavigator state with all tabs and the correct selected tab.
  * Tab navigators require all routes in the state for proper rendering.
@@ -355,6 +372,14 @@ function getAdaptedState(state: PartialState<NavigationState<RootNavigatorParamL
             return getRoutesWithIndex([getTabNavigatorState({name: NAVIGATORS.REPORTS_SPLIT_NAVIGATOR}), ...currentState.routes]);
         }
 
+        // Public screens (e.g. ValidateLogin) exist in both PublicScreens and AuthScreens navigators.
+        // Don't prepend TabNavigator because when the user is unauthenticated, PublicScreens is active
+        // and TabNavigator doesn't exist — causing the RESET action to fail.
+        const hasOnlyPublicScreens = currentState.routes.every((route) => PUBLIC_SCREENS.has(route.name));
+        if (hasOnlyPublicScreens) {
+            return currentState;
+        }
+
         const defaultFullScreenRoute = getDefaultFullScreenRoute(focusedRoute);
 
         // If not, add the default full screen route.