[L-1] Mixed Library Usage — OZ ERC721 + Solmate ERC20

Description

• SantasList imports from OpenZeppelin (ERC721), while SantaToken imports from Solmate (ERC20). Mixing two different standard library vendors in the same project increases audit surface, can cause subtle interface mismatches, and complicates dependency management.

Risk

Likelihood:

• N/A (code quality issue)

Impact:

• Maintainability risk; potential for inconsistent behavior in edge cases (e.g., differing safeTransfer semantics).

Recommended Mitigation

Standardize on one library — preferably OpenZeppelin for audited, battle-tested ERC standards, or Solmate throughout for gas efficiency.