3cbe6ee73b
- Replace 3-way ByteArray concatenation for tagged hash inputs with single pre-sized array + copyInto calls (avoids 3 intermediate arrays) - Add U256.fromBytes(bytes, offset) overload to decode from a slice without copyOfRange allocation - Build signature output using toBytesInto instead of concatenation - Apply same pattern to signSchnorr's nonce and challenge hash inputs https://claude.ai/code/session_01BhU63WUe9AhikZxRdw3Lpg