29d1610d1a
- C1: Fix leaveGroup() crash (used group state after deletion) - C2: Fix X25519.bigIntegerToBytes ArrayIndexOutOfBoundsException - C3: Add all-zeros DH check to prevent small-subgroup attacks - C4: Fix path secret derivation off-by-one (RFC 9420 Section 7.4) - C5: Use constant-time comparison for confirmation/membership tags - C6: Stage signing keys in proposeSigningKeyRotation, promote on commit - C7: Make commit conflict tracker per-(group,epoch) not just per-epoch - C8: Fix tree deserialization leafCount for trimmed trees - H8: Add Mutex-based thread safety to MlsGroupManager - H9: Fix extractPrivateKeyBytes little-endian padding - H12: Blank direct path on addLeaf (RFC 9420 Section 7.7) - M14: Track actual leaf index from addLeaf for Welcome generation https://claude.ai/code/session_018gVkmmYgMFtBH7G31pCk9N