v6.0.0

Changed

• BREAKING CHANGE: canonical chain naming — Cargo feature = Rust module =
  CLI command. Renames: btc→bitcoin, ltc→litecoin, doge→dogecoin,
  bch→bitcoin-cash (module bitcoin_cash), xrp→xrpl, fil→filecoin,
  sol→solana, xlm→stellar, ada→cardano. CLI keeps ticker aliases
  only (btc, ltc, doge, bch, xrp, fil, sol, xlm, ada, kas,
  trx, atom, cspr, apt, eth, ethereum); non-ticker aliases were
  removed. Vector files renamed to match (vectors/bitcoin.json, …).
• BREAKING CHANGE: library layout — chain implementations now live under
  kobe::chains::<name> (e.g. kobe::chains::bitcoin::Bitcoin) with no root
  re-exports of chain modules (Account, SecretKey, Chain, Wallet,
  Style, DerivationPath and friends stay at the crate root). Internally,
  encoders live in encoding/ submodules, derivation engines in hd/, and
  TON TL-B cell hashing in chains/ton/cell.rs. The kobe-cli binary is split into
  cli/target/mnemonic/render/help modules.
• BREAKING CHANGE: kobe::btc::Bitcoin→kobe::chains::bitcoin::Bitcoin,
  Evm struct name kept, Xrpl/Filecoin/Solana/Stellar/Cardano and
  friends renamed to match their modules; Kaspa::new now takes
  (network, encoding).
• Wallet-compatibility labels on every Style audited against the wallets'
  own derivation settings (OneKey account template, Ledger Live modes,
  Trust Wallet index-0, etc.).
• BREAKING CHANGE: kobe-cli mnemonic-prefix error messages report the
  1-based word position instead of echoing the offending word.
• Documentation moved from README.md to docs/ (Fumadocs tree, synced to
  docs.qntx.org); the README is a minimal landing page again.
• Version bump to 6.0.0 for the renamed modules/features/commands.

Added

• Solana style root (m/44'/501', non-iterating) — Ledger Live's
  solanaMain derivation mode ("Ledger Live (first account)").
• Kaspa --encoding onekey: the address carries the BIP-341 key-path-tweaked
  x-only key (shared encoding::taproot with Bitcoin P2TR) while
  private_key stays the untweaked raw key, matching OneKey's default Kaspa
  account type.
• vectors/bip39-passphrase.json: restored v4 passphrase-rule vectors —
  NFC/NFD passphrases derive the same seed, empty passphrase equals none,
  passphrases are never trimmed; asserted through the public API.
• scripts/vectors/crosscheck.ts: a second-source audit that re-derives
  every CLI account with Trust Wallet Core (bun run crosscheck).

Fixed

• BIP-341 taproot tweak now fails on t >= n (as taproot_tweak_pubkey
  requires) instead of reducing the scalar mod n; unreachable for any real
  key.

Security

• The parsed bip39::Mnemonic and the phrase string are built in
  Zeroizing buffers — phrase assembled from mnemonic.words() into a
  pre-sized string (no to_string() regrowth), and the CLI stdin read goes
  straight into a Zeroizing<String> with error messages that never echo
  mnemonic content.