Addresses code-review finding: the pre_departure branch made trip-feed-col
dual-purpose. Pre-departure landing now lives in its own partial; home picks
it via {% if all_items|length == 0 %}, and trip-feed-col drops the
pre_departure param to be shared 1:1 by both callers.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BftDn9vu9SonFAY4vxu4uk