Megamenu page-tree panels; generic slug normaliser

- evo_megamenu_json: new entry layout "pagetree" - the panel columns
  mirror the live subtree of the page the entry links to (one child per
  column, grandchildren as items, getMenu() restrictions apply), so the
  menu can never age against the page structure again. The stale
  9-market panel after the markets realign was the trigger. Curated
  columns are ignored on this layout; teasers and the featured slot
  stay editorial. Same columns shape in the payload - front ends need
  no change beyond knowing the new layout string
- new vitec:normalize-slugs --root=<slug> [--style=plain|and]:
  recursively realigns every slug below a root to
  <parent-slug>/<slugified-title>, cascading, with a sibling-collision
  warning; EXT:redirects covers the old URLs. TYPO3's slug generator
  keeps slashes from page titles (third hit: rtcc-/-rtic), this sweeps
  a whole tree. Run on /solutions: four fixes, including the
  long-standing passenger page and solution page 467. The misspelled
  "engagament" slug stays deliberately - it follows the page title and
  is fixed in the coordinated typo task

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

packages/evo_megamenu_json/Classes/Service/MenuBuilder.php

@@ -86,7 +86,7 @@ final class MenuBuilder
     private function buildEntry(array $entry, int $stage, ContentObjectRenderer $cObj): array
     {
         $layout = (string)($entry['layout'] ?? 'columns');
-        if (!in_array($layout, ['columns', 'teasers', 'catalog'], true)) {
+        if (!in_array($layout, ['columns', 'teasers', 'catalog', 'pagetree'], true)) {
             $layout = 'columns';
         }
 
@@ -103,6 +103,16 @@ final class MenuBuilder
             ];
         }
 
+        // Page-tree panels (2026-10-23): the columns mirror the live subtree
+        // of the page the entry links to - one column per child, its children
+        // as the items - so the menu can never age against the page structure
+        // again (the stale 9-market panel after the markets realign was the
+        // trigger). Curated columns are ignored on this layout; teasers and
+        // the featured slot stay editorial.
+        if ($layout === 'pagetree') {
+            $columns = $this->treeColumns((string)$entry['link'], $cObj);
+        }
+
         $built = [
             'title' => (string)$entry['title'],
             'link' => $this->url((string)$entry['link'], $cObj),
@@ -177,6 +187,42 @@ final class MenuBuilder
         return $built;
     }
 
+    /**
+     * Columns from the page tree below the entry's linked page. getMenu()
+     * applies the frontend restrictions (hidden, time, nav_hide, fe_group),
+     * so an editor hides a page and it leaves the menu with the next flush.
+     *
+     * @return array<int,array<string,mixed>>
+     */
+    private function treeColumns(string $entryLink, ContentObjectRenderer $cObj): array
+    {
+        $rootUid = 0;
+        if (preg_match('/t3:\/\/page\?uid=(\d+)/', $entryLink, $matches)) {
+            $rootUid = (int)$matches[1];
+        } elseif (ctype_digit(trim($entryLink))) {
+            $rootUid = (int)trim($entryLink);
+        }
+        if ($rootUid <= 0) {
+            return [];
+        }
+        $columns = [];
+        foreach ($this->pageRepository->getMenu($rootUid) as $child) {
+            $items = [];
+            foreach ($this->pageRepository->getMenu((int)$child['uid']) as $grandchild) {
+                $items[] = [
+                    'title' => (string)(($grandchild['nav_title'] ?? '') !== '' ? $grandchild['nav_title'] : $grandchild['title']),
+                    'link' => $this->url('t3://page?uid=' . (int)$grandchild['uid'], $cObj),
+                ];
+            }
+            $columns[] = [
+                'title' => (string)(($child['nav_title'] ?? '') !== '' ? $child['nav_title'] : $child['title']),
+                'link' => $this->url('t3://page?uid=' . (int)$child['uid'], $cObj),
+                'items' => $items,
+            ];
+        }
+        return $columns;
+    }
+
     // ------------------------------------------------------------ internals
 
     /** @return array<string,mixed>|null */