ERC-8286: Modular Accounts for Frame Transactions

ERC-7579 standardizes a core module system for modular smart accounts: module types, the module lifecycle, installation, and account configuration. This proposal extends that system to EIP-8141 native account abstraction by defining the validation flow for frame transactions. It reuses ERC-7579’s module structure unchanged: a validator returns an approval mode, and the account applies it through EIP-8141’s APPROVE instruction during a VERIFY frame. Keeping the module system in ERC-7579 and layering account-abstraction-specific validation flows as extensions lets a single module ecosystem serve accounts across multiple account abstraction implementations, without forking modules or vendor lock-in.