[BUG] Deadlines under 30 minutes are automatically clipped to 30 minutes.

[AlexNi245]

When setting the Tx.deadline field in the Settings Modal below 30 minutes, the value automatically clips to 30 minutes. The modal displays the lower value, but the transaction object stores 30 minutes instead.

Steps to Reproduce

1. Open the Swap UI and select the token pair to trade.
2. Open the Settings Modal and set the Deadline to 5 minutes.
3. Close the Settings Modal.
4. Reopen the Settings Modal — the Deadline is still set to 5 minutes.
5. Submit the swap.
6. View the transaction on Etherscan.
7. Decode the Input Data.
8. Notice that the deadline field in the transaction data is creationDate + 30min instead of creationDate + 5min.

Expected Behavior

The transaction's deadline field should equal creationDate + user-specific deadline.

The transaction below demonstrates this behavior, set with a 5-minute deadline but an incorrect deadline field in the transaction data.

https://sepolia.etherscan.io/tx/0xe9dd8a1aa07b78e22155dfc8da929462627bda6c8ffe4ea7f9d1c85fb85e5dc0