Datapath stories, grid repairs, menu v2 pure, hero placeholders, fec test

Batch of 2026-10-28/29 plus 2026-11-03:

- NEW vitec:import-datapath-stories: 22 story packages from the agency
  dump (docx + Links/ assets) as usecase records with content, quotes,
  images, customer logos, download cards; --repair-quotes normalizes
  attribution lines; asset backfill for existing stories
- /products grid incident repaired (fix_products_grid, fix_graphics_grid,
  check_grid_page): containers unhidden, 46 duplicate cards soft-deleted,
  section order restored; BuildProductPortfolio and
  ImportProductCategoryPages now GUARD against re-runs on pages that
  already carry vitec_cols_% containers
- ' double-encoding fixed: render-pipeline importers write literal
  apostrophes (ENT_NOQUOTES), fix_double_entities literalizes existing rows
- ticket quick wins (ticket_quickwins_20261028), broadcast market page
  cleanup, AttachCardImages market-card handling, SubmarketWorkbook
  META REPAIR, story content/video fixes (fix_story_*)
- ProvideProductCatalog: transitional v1 fields removed (categories
  uid/link, legacyGroupFields, item products teaser) - pure v2 shape
  (ticket 0024-FE); search renderer keeps its teaser
- BuildProductOverviews: heroes get the numbered placeholder background
  (placeholders/pages/<uid>-01.png, wide grey fallback) - backfill on
  existing pages with empty hero_bgimage, attached at creation for new
  pages; existing references always win (ticket 0026-FE); 40 placeholder
  PNGs shipped to fileadmin (not tracked)
- AttachPageMedia: --depth=3 with sysfolders as pass-through parents for
  the overview pages' -08 menu tiles
- NEW migrations/fec_isolation_test.sh: two-user live test proving
  fe_comment ticket isolation (backend verified tight, cross-user
  sighting traced to the FE page-JSON cache, ticket 0027-BE)

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

migrations/check_grid_page.php

@@ -0,0 +1,46 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * Diagnose wie check_grid_447.php, aber mit Seiten-Parameter: Karten,
+ * Grid-Container und Intros einer Seite mit colPos / tx_container_parent /
+ * sorting / hidden / deleted.
+ *
+ * READ-ONLY. Usage: php migrations/check_grid_page.php 569
+ */
+
+error_reporting(E_ALL);
+ini_set('display_errors', '1');
+
+$pid = (int)($argv[1] ?? 0);
+if ($pid <= 0) {
+    exit("Usage: php migrations/check_grid_page.php <pid>\n");
+}
+
+$root = null;
+$dir = __DIR__;
+for ($i = 0; $i < 5; $i++) {
+    if (is_file($dir . '/config/system/settings.php')) { $root = $dir; break; }
+    $dir = dirname($dir);
+}
+if ($root === null) { exit("no project root\n"); }
+$settings = require $root . '/config/system/settings.php';
+$db = $settings['DB']['Connections']['Default'];
+$pdo = new PDO(
+    sprintf('mysql:host=%s;port=%s;dbname=%s;charset=utf8mb4', $db['host'] ?? 'localhost', $db['port'] ?? 3306, $db['dbname'] ?? ''),
+    $db['user'] ?? '', $db['password'] ?? '',
+    [PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION, PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC]
+);
+
+echo "=== vitec_card / vitec_cols_* / vitec_introparagraph auf pid $pid ===\n";
+$rows = $pdo->query(
+    "SELECT uid, CType, LEFT(header,32) h, colPos, tx_container_parent par, sorting, hidden, deleted
+     FROM tt_content WHERE pid = $pid AND (CType IN ('vitec_card','vitec_introparagraph') OR CType LIKE 'vitec_cols_%')
+     ORDER BY deleted, colPos, sorting, uid"
+)->fetchAll();
+foreach ($rows as $r) {
+    printf("  #%-6d %-22s col=%-4d par=%-6d sort=%-6d hid=%d del=%d %s\n",
+        $r['uid'], $r['CType'], $r['colPos'], $r['par'], $r['sorting'], $r['hidden'], $r['deleted'], $r['h']);
+}
+echo "\ncounts: " . count($rows) . " rows\n";