- hashPassword now uses Argon2id (memory-hard, GPU-resistant) via hash-wasm - verifyPassword checks both Argon2id and bcrypt - Legacy hashes (bcrypt, argon2, md5, sha1, sha256, sha512, combined, salted) auto-migrate to Argon2id on successful login - Updated all password tests to expect Argon2id format - Register validation: min 12 chars, max 128, upper+lower+digit+special required - Username restricted to [A-Za-z0-9_-], reserved names blocked - Disposable email domains blocked - Fixed parameter names for hash-wasm argon2id API (memorySize, iterations, parallelism, hashLength)