Edition.sol doesn't actually refunt excess ETH

Summary

Edition.sol doesn't actually refunt excess ETH.

Vulnerability Detail

When minting tokens, all of the ETH gets sent to the FeeManager contract, which would leave the Edition.sol contract empty to begin with. So any excess ETH would actually get stuck in the FeeManager contract.

Impact

The user will not recieve his excess ETH back.

Code Snippet

https://github.com/sherlock-audit/2024-04-titles/blob/main/wallflower-contract-v2/src/editions/Edition.sol#L228-L242

function mint(
        address to_,
        uint256 tokenId_,
        uint256 amount_,
        address referrer_,
        bytes calldata data_
    ) external payable override {
        // wake-disable-next-line reentrancy
        FEE_MANAGER.collectMintFee{value: msg.value}(
            this, tokenId_, amount_, msg.sender, referrer_, works[tokenId_].strategy
        );

        _issue(to_, tokenId_, amount_, data_);
        _refundExcess();
    }

https://github.com/sherlock-audit/2024-04-titles/blob/main/wallflower-contract-v2/src/editions/Edition.sol#L512-L516

function _refundExcess() internal {
        if (msg.value > 0 && address(this).balance > 0) {
            msg.sender.safeTransferETH(address(this).balance);
        }
    }