HUX-06: the auto-router now consults the loopback HUX service (worker
trust, HMAC-derived conversation id from the persisted session) for the
conversation's selected friendly mode and maps it onto the existing
provider-neutral pools: fast->auto/fast, thoughtful/research->auto/deep,
create->auto/balanced; private pins the local route and refuses hosted
overrides. Explicit UI picks keep precedence; every HUX absence or
failure falls through to the previous behaviour unchanged. 95% branch
coverage; quality contract registers the new module.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BvMSXH8VH2tMWXanb8SJdf
