Add check for positive amount in dapp example #3794
Description
Description
Added a check to ensure the amount is greater than zero, preventing transfers with invalid or zero amounts.
It's a community bug already fixed, but has been hanging out for a while. The user's PR #3588.
Steps to reproduce
Enter a negative amount and observe the behaviour.
Additional context
No response
Hedera network
No response
Version
latest
Operating system
None