Add active trigger for migrated user welcome modal and navigate to Home on dismiss

The migrated user welcome modal guard was purely passive — it only
evaluated during navigation actions. When nvp_tryNewDot was updated
via Onyx, the guard condition became true silently but no navigation
was dispatched, so the modal only appeared on the next user-initiated
navigation.

Added proactive navigation in the Onyx callbacks: when session is
authenticated, app is loaded, and nudge migration is active, navigate
directly to the modal route. Also added Navigation.navigate(ROUTES.HOME)
in MigratedUserWelcomeModal's onClose handler so dismissing the modal
navigates the user to the Reports page as expected.

Co-authored-by: Eric Han <eh2077@users.noreply.github.com>

Author: MelvinBot

src/components/MigratedUserWelcomeModal.tsx

@@ -11,8 +11,10 @@ import {openExternalLink} from '@libs/actions/Link';
 import {dismissProductTraining} from '@libs/actions/Welcome';
 import convertToLTR from '@libs/convertToLTR';
 import Log from '@libs/Log';
+import Navigation from '@libs/Navigation/Navigation';
 import variables from '@styles/variables';
 import CONST from '@src/CONST';
+import ROUTES from '@src/ROUTES';
 import type {FeatureListItem} from './FeatureList';
 import FeatureTrainingModal from './FeatureTrainingModal';
 import Icon from './Icon';
@@ -58,6 +60,7 @@ function MigratedUserWelcomeModal() {
     const onClose = () => {
         Log.hmmm('[MigratedUserWelcomeModal] onClose called, dismissing product training');
         dismissProductTraining(CONST.MIGRATED_USER_WELCOME_MODAL);
+        Navigation.navigate(ROUTES.HOME);
     };
 
     const featureListContent = (

src/libs/Navigation/guards/MigratedUserWelcomeModalGuard.ts

@@ -4,29 +4,69 @@ import {tryNewDotOnyxSelector} from '@selectors/Onboarding';
 import Onyx from 'react-native-onyx';
 import type {OnyxEntry} from 'react-native-onyx';
 import Log from '@libs/Log';
+import Navigation from '@libs/Navigation/Navigation';
 import isProductTrainingElementDismissed from '@libs/TooltipUtils';
 import CONST from '@src/CONST';
 import NAVIGATORS from '@src/NAVIGATORS';
 import ONYXKEYS from '@src/ONYXKEYS';
 import ROUTES from '@src/ROUTES';
 import SCREENS from '@src/SCREENS';
-import type {DismissedProductTraining} from '@src/types/onyx';
+import type {DismissedProductTraining, Session} from '@src/types/onyx';
 import type {GuardResult, NavigationGuard} from './types';
 
 let hasBeenAddedToNudgeMigration = false;
 let dismissedProductTraining: OnyxEntry<DismissedProductTraining>;
+let session: OnyxEntry<Session>;
+let isLoadingApp = true;
 
 let hasRedirectedToMigratedUserModal = false;
 
 function resetSessionFlag() {
     hasRedirectedToMigratedUserModal = false;
 }
 
+/**
+ * Proactively navigate to the migrated user welcome modal when all conditions are met,
+ * without waiting for a user-initiated navigation action.
+ */
+function navigateToMigratedUserWelcomeModalIfReady() {
+    if (
+        !session?.authToken ||
+        isLoadingApp ||
+        hasRedirectedToMigratedUserModal ||
+        !hasBeenAddedToNudgeMigration ||
+        isProductTrainingElementDismissed('migratedUserWelcomeModal', dismissedProductTraining)
+    ) {
+        return;
+    }
+
+    Log.info('[MigratedUserWelcomeModalGuard] Proactively navigating to migrated user welcome modal');
+    hasRedirectedToMigratedUserModal = true;
+    Navigation.navigate(ROUTES.MIGRATED_USER_WELCOME_MODAL.getRoute());
+}
+
+Onyx.connectWithoutView({
+    key: ONYXKEYS.SESSION,
+    callback: (value) => {
+        session = value;
+        navigateToMigratedUserWelcomeModalIfReady();
+    },
+});
+
+Onyx.connectWithoutView({
+    key: ONYXKEYS.IS_LOADING_APP,
+    callback: (value) => {
+        isLoadingApp = value ?? true;
+        navigateToMigratedUserWelcomeModalIfReady();
+    },
+});
+
 Onyx.connectWithoutView({
     key: ONYXKEYS.NVP_TRY_NEW_DOT,
     callback: (value) => {
         const result = value ? tryNewDotOnyxSelector(value) : undefined;
         hasBeenAddedToNudgeMigration = result?.hasBeenAddedToNudgeMigration ?? false;
+        navigateToMigratedUserWelcomeModalIfReady();
     },
 });