Bug: USDT Cross-Chain Transfer Shows Success Without Proper Approval

[lxingleo]

🐛 Bug Description

When attempting to transfer USDT from the current chain to BSC (Binance Smart Chain), the system incorrectly displays a "transfer successful" message even when the transaction should have been blocked due to insufficient allowance (approval limit).

Expected Behavior

• System should check USDT allowance before attempting transfer
• If allowance is insufficient, should prompt user to approve USDT spending
• Transfer should only proceed after proper approval
• Should display appropriate error message if approval is missing

Actual Behavior

• System attempts USDT transfer without checking allowance
• Transaction appears to succeed in UI despite insufficient approval
• No approval prompt is shown to user
• Transfer success message is displayed incorrectly

🔍 Steps to Reproduce

1. Navigate to cross-chain transfer interface
2. Select USDT as the token to transfer
3. Choose BSC as the destination chain
4. Enter transfer amount
5. Click "Transfer" button
6. Observe: Transfer success message appears without approval prompt