In-platform detail page for an 'On this date in markets' entry.

OWNER welcome-page audit #3 (2026-05-17): the welcome gallery's "On this date" tile hard-coded url="/wander" because the detail page "never shipped". It ships now. The tile emits /lore/on-this-date/{slug} where slug = on_this_date_slug(year, headline); this route resolves it back to the corpus entry and renders the headline + year + full body paragraph, with a "wander on →" CTA so the serendipity affordance the tile used to point at is preserved one click deeper.

On no-match: 302 → /wander (graceful — never 500 / never a bare 404 dead-end, mirrors the wander plumbing's never-strand-the- visitor posture).

F-X5 (2026-05-28): SSR template stays the share-link / OG preview surface for everyone (per OWNER ratification — share UX wins over strict feedback_prefer_inapp_over_seo_routing). For authed users (ol_session cookie present) a small "Open in Ledge →" affordance is rendered above the article — ambient handoff to the in-app On This Date pane without taking the share preview away. Anon visitors see the bare SSR exactly as before.