Method:navigateToPreferredDestination() in MainActivity.java

Description:
A race condition occurs when thenavigateToPreferredDestination() method is called before the fragment is fully attached to the activity. This causes anIllegalStateException and app crash.

Steps to Reproduce:

1. Launch the app
2. Quickly navigate between screens during app startup
3. CallnavigateToPreferredDestination() before fragment lifecycle completes

Expected Behavior:
Navigation should wait for fragment to be fully attached or handle gracefully.

Actual Behavior:
App crashes withIllegalStateException: Fragment not attached to activity

Proposed Fixed
Add this condition right before navigation:

if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.RESUMED)) {navController.navigate(preferredDestination,null,options);}