feat(post-form): U3 — auth-aware feed collection; drafts owner-only

Owner-aware draft visibility (R5, KTD7/KTD8) on trip.html.twig and home.html.twig
(active-trip branch):
- Compute owner_can_edit = authenticated AND username == site.owner_username AND
  (this is the active trip). The super-admin tester authenticates too, so the gate
  is owner identity, not mere login.
- The feed list (all_items) uses an owner-aware journal collection: owner sees
  drafts, everyone else (and every non-active-trip view) sees published only.
- journal_entries stays published-only — it feeds stats/counts. map_entries now
  filters on item.page.published, so drafts get a feed card but no marker and no
  stat contribution.
- Thread owner_can_edit into trip-feed-col (defaults false) for the U4 controls.
Between-trips home grid stays published-only. Stories untouched (journal drafts only).

Verified on the container: draft entry with coords shows in the owner's feed but
not the map or count; absent entirely for anonymous (V4).

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01H1FrCYNq6RXdGYbn5PFrhM

themes/intotheeast/templates/partials/trip-feed-col.html.twig

@@ -1,5 +1,9 @@
 {% import 'macros/stats.html.twig' as stats_m %}
 {% import 'macros/cycling.html.twig' as cycling_m %}
+{# owner_can_edit gates the Draft badge + Edit/Delete controls on each card
+   (threaded into entry-journal below). Default false so any caller that doesn't
+   pass it renders a read-only feed. #}
+{% set owner_can_edit = owner_can_edit ?? false %}
 <div class="home-feed-col">
     <div class="home-trip-header">
         <h1 class="home-trip-name">{{ trip_page.title }}</h1>