Adds a timezone step between cli-agent and channel wiring in setup:auto.
Autodetect via --step timezone; if it resolves to UTC or fails, confirm
with the user and accept either an IANA zone or a free-text description
(e.g. "New York"). Free-text falls through to a headless `claude -p`
call that returns a single IANA string, gated on the claude CLI being
on PATH.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
202ee71311