The counter path checked it, the explicit one did not, and the parser is not
the only caller: processChatCommand takes APIWalletBind from library callers
too. hardened leaves an index at or above 2^31 alone, so account i and
i + 2^31 are the same key while the duplicate check compares the stored
integers, and two profiles could hold one account's names.
The rfc now says what hiding a profile from /_wallet does and does not
protect: the seed is one per device, so whoever unlocks any profile can
derive every account.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Rvc3HbiWBTqbAvRT45G5oX
