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/DataProcessing/ContainerChildrenProcessor.php

@@ -7,6 +7,11 @@ use Evomedien\Vitec\UserFunc\ProductListJsonRenderer;
 use Evomedien\Vitec\UserFunc\ProductShowJsonRenderer;
 use Evomedien\Vitec\UserFunc\UsecaseListJsonRenderer;
 use Evomedien\Vitec\UserFunc\UsecaseShowJsonRenderer;
+use Evomedien\Vitec\UserFunc\MarketShowJsonRenderer;
+use Evomedien\Vitec\UserFunc\SolutionShowJsonRenderer;
+use Evomedien\Vitec\UserFunc\DownloadcardJsonRenderer;
+use Evomedien\Vitec\UserFunc\DownloadcardcollectionJsonRenderer;
+use Evomedien\Vitec\UserFunc\DatasheetsJsonRenderer;
 use TYPO3\CMS\Core\Database\Connection;
 use TYPO3\CMS\Core\Database\ConnectionPool;
 use TYPO3\CMS\Core\Utility\GeneralUtility;
@@ -70,6 +75,11 @@ final class ContainerChildrenProcessor implements DataProcessorInterface
         'vitec_productshow'  => [ProductShowJsonRenderer::class, 'product'],
         'vitec_usecaselist'  => [UsecaseListJsonRenderer::class, 'usecases'],
         'vitec_usecaseshow'  => [UsecaseShowJsonRenderer::class, 'usecase'],
+        'vitec_marketshow'   => [MarketShowJsonRenderer::class, 'market'],
+        'vitec_solutionshow' => [SolutionShowJsonRenderer::class, 'solution'],
+        'vitec_downloadcard' => [DownloadcardJsonRenderer::class, 'downloadcard'],
+        'vitec_downloadcardcollection' => [DownloadcardcollectionJsonRenderer::class, 'downloadcardcollection'],
+        'vitec_datasheets' => [DatasheetsJsonRenderer::class, 'datasheets'],
     ];
 
     public function process(
@@ -171,13 +181,17 @@ final class ContainerChildrenProcessor implements DataProcessorInterface
      */
     private function resolvePluginData(array $record, array &$data): void
     {
+        // v14: plugins are their own CType; legacy elements still carry list_type.
+        $cType = (string)($record['CType'] ?? '');
         $listType = (string)($record['list_type'] ?? '');
-        if ($listType === '' || !isset(self::PLUGIN_RENDERERS[$listType])) {
+        $key = isset(self::PLUGIN_RENDERERS[$cType]) ? $cType
+             : (isset(self::PLUGIN_RENDERERS[$listType]) ? $listType : null);
+        if ($key === null) {
             return;
         }
 
         try {
-            [$rendererClass, $jsonKey] = self::PLUGIN_RENDERERS[$listType];
+            [$rendererClass, $jsonKey] = self::PLUGIN_RENDERERS[$key];
             $renderer = GeneralUtility::makeInstance($rendererClass);
 
             if (!method_exists($renderer, 'renderForRecord')) {