VITEC headless v14: 5-bug fix unifies plugin renderers + cleanup

Resolves a cascade of TYPO3 v14 breaking changes that left every VITEC
plugin's JSON output silently empty:

1. `list_type` column dropped — all renderer page-discovery queries now
   filter by `CType = 'vitec_X'`.
2. `#[AsAllowedCallable]` attribute added to every public render() —
   without it v14 throws AllowedCallableException, which headless
   silently filters via its "Oops, an error occurred!" guard.
3. `$GLOBALS['TSFE']->id` is null inside JSON cObj context — page id
   now read from the `frontend.page.information` request attribute
   (TSFE fallback kept for legacy entry points).
4. page.tsconfig wizard items migrated to `CType = vitec_X` directly
   (legacy `CType=list, list_type=...` no longer exists in v14).
5. ContainerChildrenProcessor + ContentElementResolver dispatch the
   PLUGIN_RENDERERS map by CType (primary) with list_type fallback.

Beyond the bug fix this commit also contains:
- Datasheets renderer rewritten to "products with newest datasheet"
  semantics (filtered via Download.hideondatasheets).
- New vitec/card content block — multi-purpose card with backend
  preview and layout/background/aspect/alignment/border/shadow options.
- New vitec_container CType (b13 single-column container, FlexForm
  cssClass propagated into the JSON envelope).
- ContentElementResolver service for contentelement/contentelementcta
  link resolution; ContainerChildrenProcessor for nested plugin
  resolution inside b13 containers.
- Vitecset setup.typoscript: ContentElement import moved to top so
  lib.contentElement is defined before VITEC's tt_content blocks.
- Cleanup: 98 .bak.<timestamp> debugging backups removed; *.bak.* and
  /public/_assets_install/ added to .gitignore.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/vitec/Classes/UserFunc/UsecaseShowJsonRenderer.php

@@ -4,6 +4,8 @@ declare(strict_types=1);
 
 namespace Evomedien\Vitec\UserFunc;
 
+
+use TYPO3\CMS\Core\Attribute\AsAllowedCallable;
 use Doctrine\DBAL\ParameterType;
 use TYPO3\CMS\Core\Database\ConnectionPool;
 use TYPO3\CMS\Core\Resource\ResourceFactory;
@@ -20,21 +22,42 @@ use TYPO3\CMS\Extbase\Service\ImageService;
  */
 class UsecaseShowJsonRenderer
 {
+    #[AsAllowedCallable]
     public function render(string $content, array $conf): string
     {
-        $pageId = (int)($GLOBALS['TSFE']->id ?? 0);
+        // 1) cObj data path
+        $row = is_array($this->cObj->data ?? null) ? $this->cObj->data : null;
+        if ($row && (string)($row['CType'] ?? '') === 'vitec_usecaseshow') {
+            return $this->renderForRecord($row);
+        }
 
-        $ttContentQb = GeneralUtility::makeInstance(ConnectionPool::class)
+        // 2) Page-id via v14 request attribute (TSFE->id is often null in JSON cObj context)
+        $pageId = 0;
+        $request = $GLOBALS['TYPO3_REQUEST'] ?? null;
+        if ($request !== null) {
+            $pageInfo = $request->getAttribute('frontend.page.information');
+            if ($pageInfo !== null) {
+                $pageId = (int)$pageInfo->getId();
+            }
+        }
+        if ($pageId <= 0) {
+            $pageId = (int)($GLOBALS['TSFE']->id ?? 0);
+        }
+        if ($pageId <= 0) {
+            return '';
+        }
+
+        $queryBuilder = GeneralUtility::makeInstance(\TYPO3\CMS\Core\Database\ConnectionPool::class)
             ->getQueryBuilderForTable('tt_content');
 
-        $contentElements = $ttContentQb
+        $contentElements = $queryBuilder
             ->select('*')
             ->from('tt_content')
             ->where(
-                $ttContentQb->expr()->eq('pid', $ttContentQb->createNamedParameter($pageId, ParameterType::INTEGER)),
-                $ttContentQb->expr()->eq('list_type', $ttContentQb->createNamedParameter('vitec_usecaseshow', ParameterType::STRING)),
-                $ttContentQb->expr()->eq('deleted', 0),
-                $ttContentQb->expr()->eq('hidden', 0)
+                $queryBuilder->expr()->eq('pid', $queryBuilder->createNamedParameter($pageId, ParameterType::INTEGER)),
+                $queryBuilder->expr()->eq('CType', $queryBuilder->createNamedParameter('vitec_usecaseshow', ParameterType::STRING)),
+                $queryBuilder->expr()->eq('deleted', 0),
+                $queryBuilder->expr()->eq('hidden', 0)
             )
             ->executeQuery()
             ->fetchAllAssociative();
@@ -46,6 +69,7 @@ class UsecaseShowJsonRenderer
         return $this->renderForRecord($contentElements[0]);
     }
 
+
     /**
      * @param array<string,mixed> $contentElement
      */