Megamenu goes visual: spotlight layout, page images on pagetree columns

- customer wish (via Olli, 2026-10-27): a more visual main menu in the
  style of rossvideo.com - image cards instead of plain link lists; for
  Insights a left-rail submenu whose hover swaps a visual area showing
  the latest news and the next events
- new entry layout "spotlight" in evo_megamenu_json, built strictly on
  the catalog pattern so the extension stays project-neutral: `nav` is
  a flat rail from the linked page's live children (abstract as teaser,
  first page media as 640px-webp image from stage 2 - the hover swap
  material), `spotlight` is emitted verbatim from the new
  BuildSpotlightEvent (null without a listener); curated columns are
  ignored like on pagetree
- new vitec listener ProvideInsightsSpotlight supplies the cards: the
  three latest news (storage pid 11, type 0 - the Solr convention;
  link /news/article/<path_segment> per the NewsDetail route enhancer;
  fal_media as processed 640px webp) and the next two events
  (hideonwebsite = 0, upcoming by eventstart/eventend; link = eventurl
  or the events page)
- pagetree columns can now carry an image (stage 2+, first page media
  of the column's page): attach images in the page properties and the
  markets/solutions panels turn into image cards without further code
- TCA select and label extended; README brought up to date (the
  pagetree layout had never been documented) with the spotlight JSON
  contract, reference mirror synced; frontend briefing updated
- activation is editorial: switch the Insights menu entry to the
  spotlight layout and link it to the Insights page

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

packages/evo_megamenu_json/Resources/Private/Language/locallang_db.xlf

@@ -26,6 +26,7 @@
       <trans-unit id="tx_evomegamenujson_entry.layout.teasers"><source>Link column plus teaser cards</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.layout.catalog"><source>Catalog (data-driven: categories and items from the site package, teaser cards as featured tiles)</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.layout.pagetree"><source>Page tree (data-driven: one column per child of the linked page, its children as items; curated columns are ignored)</source></trans-unit>
+      <trans-unit id="tx_evomegamenujson_entry.layout.spotlight"><source>Spotlight (data-driven: left-rail nav from the linked page's children plus live visual cards - latest news, next events - supplied by the site package; curated columns are ignored)</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.menu_columns"><source>Columns</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.menu_columns.description"><source>One column per group. In the teaser layout only the first column is rendered, next to the cards.</source></trans-unit>
       <trans-unit id="tx_evomegamenujson_entry.menu_teasers"><source>Teaser cards</source></trans-unit>