UI: No error message when scanning invalid token

[swedishfrenchpress]

Description: Cashu.me UI doesn't display an error message when scanning an invalid/already received eCash token.

Steps to Reproduce: Receive eCash by scanning QR code Attempt to receive the same eCash by scanning the same QR code

Expected Behavior: Cashu.me to dislpay an error message informing me that the eCash cannot be received because it has already been claimed.

Actual Behavior: UI scans the QR code and then nothing is entered in the input field, it just remains blank.

Hardware: iPhone 12 / iOS: 16.16

Screen recording https://github.com/cashubtc/cashu.me/assets/78821053/032c7c45-67d2-4283-8cff-7e0f7e9f1cb7