Megamenu: rail display for page trees, cache tags, editorial promo boxes

- Page-tree entries get a "Page tree display" field (columns | rail |
  rail-compact), emitted as display + cardSize: Markets and Solutions
  show their main pages as a list and the sub-pages as image cards on
  hover. Page-tree items carry image (page media) and teaser (abstract)
  from stage 2. Additive; front ends ignoring display render columns.
- vitec:attach-page-media gains --depth=2 and falls back to the page's
  hero background before the grey placeholder; the 39 sub-solution
  pages got their hero image as page media.
- MegamenuJsonRenderer tags every page carrying the menu with the menu
  tables and tt_content_<uid>, so saving menu records refreshes all
  pages instead of waiting for a full flush.
- Products catalog: drop catalog.news; both promo boxes ("Product
  highlight", "Product news") are the entry's editorial teaser cards.
  ProvideInsightsSpotlight back to its previous state.
- Spec v1.29 and v1.30 (header version corrected), README.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

packages/evo_megamenu_json/Configuration/TCA/tx_evomegamenujson_entry.php

@@ -43,7 +43,7 @@ return [
         '1' => [
             'showitem' => '
                 --div--;' . $ll . 'tab.general,
-                    hidden, title, link, layout,
+                    hidden, title, link, layout, tree_display,
                 --div--;' . $ll . 'tab.columns,
                     menu_columns,
                 --div--;' . $ll . 'tab.teasers,
@@ -115,6 +115,22 @@ return [
                 ],
             ],
         ],
+        'tree_display' => [
+            // page-tree panels only: same data, two presentations
+            'displayCond' => 'FIELD:layout:=:pagetree',
+            'label' => $ll . 'tree_display',
+            'description' => $ll . 'tree_display.description',
+            'config' => [
+                'type' => 'select',
+                'renderType' => 'selectSingle',
+                'default' => 'columns',
+                'items' => [
+                    ['label' => $ll . 'tree_display.columns', 'value' => 'columns'],
+                    ['label' => $ll . 'tree_display.rail', 'value' => 'rail'],
+                    ['label' => $ll . 'tree_display.rail-compact', 'value' => 'rail-compact'],
+                ],
+            ],
+        ],
 
         'menu_columns' => [
             'label' => $ll . 'menu_columns',