docs(backlog): add journal detail-page retire + hero-image cleanup items

Surfaced during the front-end journal entry edit brainstorm; referenced by
the entry-edit plan's Scope Boundaries.

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

docs/working/backlog.md

@@ -14,6 +14,23 @@ Ideas and improvements not yet planned or scheduled.
 
 ---
 
+## Hero-image cleanup (journal)
+
+The `hero_image` field was removed from the post form (journal heroes now come
+from the first uploaded photo). Follow-up: purge the now-unused field from the
+journal entity end-to-end.
+
+- [ ] **Remove hero from the journal entity** — drop `hero_image` from the entry blueprint/template so journal entries no longer carry or reference it (journal rendering already uses `entry.media.images|first`)
+- [ ] **Remove hero from posts + demo content** — strip `hero_image` frontmatter from existing journal entries and the `italy-2026-demo` seed content (`user/docs/demo/`), then re-run `make demo-load`
+
+---
+
+## Journal entry detail page
+
+- [ ] **Retire the journal-entry detail page** — the trip/home feed already renders each entry's full body inline (`entry.content|raw` in `partials/entry-journal.html.twig`), so the standalone `entry.html.twig` route per journal entry is largely redundant. Consider removing the route/permalink for journal entries. **Journal only** — stories are full standalone pages and keep their detail view. (Surfaced during the front-end edit brainstorm; unrelated to edit/delete itself.)
+
+---
+
 ## GPX Manager (`/gpx-manager`)
 
 - [ ] **Polish the UI** — the current design is functional but bare; align with the Field Notes aesthetic, add better empty states, drag-and-drop upload area