Success-story migration + new plugins + JSON/UX polish

- Success Stories: full migration from old site (48/48, audited),
  markets n:n, quotation content block, columns content block,
  pretty SEO detail URLs via SuccessStoryPathRewrite middleware,
  list/detail split (list page 4 / story page), detailUrl/backUrl
- New plugins: VITEC Locations (grid/list/map + RTE map text),
  VITEC Customer Logos (color/bw logic, only-show-selected),
  VITEC Card (one plugin for product/story/market/solution
  with reloading FlexForm + custom backend preview renderer)
- Eventlist: layout dropdown (list/grid/teaserbar) in settings
- Hero section CB: Images/Video tabs, background video + overlay
- Product JSON: full category rootline (parents), fixed missing
  ConnectionPool import (all-products crash), category tree map
- Backend preview CSS: container-query responsive (narrow columns)
- Docs: ISO architecture spec, root + extension READMEs

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

packages/vitec/Classes/UserFunc/UsecaseShowJsonRenderer.php

@@ -77,16 +77,21 @@ class UsecaseShowJsonRenderer
 
             $layout    = (string)($settings['layout'] ?? 'default');
             $debugMode = (bool)($settings['debug'] ?? false);
-            $usecaseUid = (int)($settings['usecase'] ?? 0);
-
-            // Fallback: uid/slug from the request (React detail route).
-            if (!$usecaseUid) {
-                $params = $GLOBALS['TYPO3_REQUEST']?->getQueryParams() ?? [];
-                $param = $params['tx_vitec_usecaseshow']['usecase'] ?? null;
-                if ($param !== null && $param !== '') {
-                    $usecaseUid = is_numeric($param) ? (int)$param : $this->resolveSlug((string)$param);
-                }
+            // The story is resolved from the request ONLY (detail route from the
+            // list plugin's detailUrl): route-enhancer arguments live in the
+            // `routing` PageArguments, plain GET in query params.
+            $request = $GLOBALS['TYPO3_REQUEST'] ?? null;
+            $param = null;
+            $routing = $request?->getAttribute('routing');
+            if ($routing instanceof \TYPO3\CMS\Core\Routing\PageArguments) {
+                $param = $routing->getRouteArguments()['tx_vitec_usecaseshow']['usecase'] ?? null;
             }
+            if ($param === null || $param === '') {
+                $param = ($request?->getQueryParams() ?? [])['tx_vitec_usecaseshow']['usecase'] ?? null;
+            }
+            $usecaseUid = ($param !== null && $param !== '')
+                ? (is_numeric($param) ? (int)$param : $this->resolveSlug((string)$param))
+                : 0;
 
             if (!$usecaseUid) {
                 return $debugMode
@@ -114,9 +119,11 @@ class UsecaseShowJsonRenderer
 
             $serializer = GeneralUtility::makeInstance(UsecaseSerializer::class);
 
+            $backPid = (int)($settings['backPid'] ?? 0);
             $response = [
                 'usecase' => $serializer->serializeDetail($usecase),
                 'layout'  => $layout,
+                'backUrl' => $backPid > 0 ? ($this->resolvePageUrl($backPid) ?: null) : null,
             ];
 
             if ($debugMode) {
@@ -145,4 +152,15 @@ class UsecaseShowJsonRenderer
 
         return (int)($row['uid'] ?? 0);
     }
+
+    /** Resolve a page uid to its frontend path (route enhancer aware). */
+    private function resolvePageUrl(int $pageUid): string
+    {
+        try {
+            $cObj = GeneralUtility::makeInstance(\TYPO3\CMS\Frontend\ContentObject\ContentObjectRenderer::class);
+            return (string)$cObj->typoLink_URL(['parameter' => (string)$pageUid]);
+        } catch (\Throwable $e) {
+            return '';
+        }
+    }
 }