refactor: Simplify EnhancedNFTGateInput tests and improve validation logic

- Removed redundant mock implementations and streamlined the EnhancedNFTGateInput component tests for clarity.
- Updated validation logic to ensure accurate detection of NFT types and improved user feedback during input.
- Enhanced test cases to cover various scenarios, including loading states and error handling, ensuring comprehensive coverage of the component's functionality.

These changes improve the maintainability and reliability of the tests for the EnhancedNFTGateInput component.

Author: Oba-One