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/Middleware/SuccessStoryPathRewrite.php

@@ -0,0 +1,79 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Evomedien\Vitec\Middleware;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\MiddlewareInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+use TYPO3\CMS\Core\Database\ConnectionPool;
+use TYPO3\CMS\Core\Utility\GeneralUtility;
+
+/**
+ * Pretty detail URLs for Success Stories.
+ *
+ * Public URL:  /success-stories/<slug>          (old-site SEO URLs)
+ * Real page:   /success-stories/story/<slug>    (subpage holding ONLY the
+ *                                                usecaseshow plugin)
+ *
+ * TYPO3's page router always resolves /success-stories/<slug> to the LIST
+ * page (longest page-slug prefix), so the detail subpage could never answer
+ * that URL. This middleware rewrites the request path internally — before
+ * page resolution — whenever <slug> matches an existing (visible) success
+ * story. Real subpages of /success-stories are unaffected: no story match,
+ * no rewrite. The browser URL never changes.
+ *
+ * Exception-safe: any failure leaves the request untouched.
+ */
+final class SuccessStoryPathRewrite implements MiddlewareInterface
+{
+    private const LIST_PATH = '/success-stories';
+    private const DETAIL_SEGMENT = 'story';
+
+    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
+    {
+        $debug = 'no-match';
+        try {
+            $path = $request->getUri()->getPath();
+            if (preg_match('#^' . self::LIST_PATH . '/([a-zA-Z0-9\-]+)/?$#', $path, $m) === 1
+                && $m[1] !== self::DETAIL_SEGMENT
+            ) {
+                if ($this->isStorySlug($m[1])) {
+                    $uri = $request->getUri()->withPath(
+                        self::LIST_PATH . '/' . self::DETAIL_SEGMENT . '/' . $m[1]
+                    );
+                    $request = $request->withUri($uri);
+                    $debug = 'rewritten';
+                } else {
+                    $debug = 'slug-not-found:' . $m[1];
+                }
+            }
+        } catch (\Throwable $e) {
+            $debug = 'exception:' . substr($e->getMessage(), 0, 60);
+        }
+
+        // TEMP-DIAG header (remove after verification)
+        return $handler->handle($request)->withHeader('X-Vitec-Story-Rewrite', $debug);
+    }
+
+    private function isStorySlug(string $slug): bool
+    {
+        $qb = GeneralUtility::makeInstance(ConnectionPool::class)
+            ->getQueryBuilderForTable('tx_vitec_domain_model_usecase');
+        $row = $qb
+            ->select('uid')
+            ->from('tx_vitec_domain_model_usecase')
+            ->where(
+                $qb->expr()->eq('slug', $qb->createNamedParameter($slug)),
+                $qb->expr()->eq('deleted', 0),
+                $qb->expr()->eq('hidden', 0)
+            )
+            ->setMaxResults(1)
+            ->executeQuery()
+            ->fetchAssociative();
+
+        return $row !== false;
+    }
+}