enhance architecture

[oScape]

Critical Issues

1. Domain depends on Platform

Files: domain/vault/operations.rs, domain/crypto/operations.rs, domain/authentication/operations.rs

• Violates pure hexagonal architecture
• Alternative: Domain should accept individual ports instead of &Platform

2. Ports depend on Domain (reverse dependency)

Files: ports/storage.rs, ports/lock.rs, ports/persistence.rs

• Ports return VaultError (domain type)
• Fix: Create generic PortError

Major Issues

3. Error context loss

File: src/adapters/native/fs_storage.rs

• .map_err(|_| discards original error
• Fix: map_err(|e| VaultError::io_error(format!("...: {}", e)))

4. OPFS code duplication

File: adapters/wasm/opfs_storage.rs (lines 180-226 and 262-307)

• Duplicated iterator traversal logic

5. Argon2 not configurable

File: adapters/shared/argon2_kdf.rs:29

• Always uses default parameters