Improve Error message for Sell crypto

If the entered amount is greater than the available balance, we currently show the message “No quotes available”. This message should be improved. For example: “Not enough BNB. You can sell up to 0.23 BNB.

<img width="320" alt="Image" src="https://github.com/user-attachments/assets/584ad4eb-e46a-4e5b-8c8e-eddcccc1fa48" />