Bug: White Screen Crash on Invalid ANS Entry

[wagmitt]

Although ANS support is enabled, entering an invalid Aptos Name Service (ANS) value causes the UI to crash (displaying a white screen). This issue interrupts user flow and requires proper error handling.

Steps to Reproduce

1. Open Petra Wallet and navigate to the ANS input field.
2. Enter an invalid ANS name. e.g. helloworld.apt
3. Observe that the UI crashes and shows a white screen.

Expected Behavior

The wallet should detect the invalid ANS input and display a clear error message without crashing or freezing the UI.