Product text import from agency XLSX workbooks

VITEC Import module: Products tab is now a searchable/sortable product
overview. "Edit Product" opens an XLSX upload with per-field source
mapping (component + cell), old/new preview and checkbox apply via
DataHandler; the mapping and manual matches are persisted and preselect
the next workbook. Category workbooks are detected and rejected.

- new: ProductXlsxReader (PhpSpreadsheet), ProductTextImportController,
  Products/ProductTexts templates, 4 module routes
- related products: per-pair card text in new side table
  tx_vitec_product_related_text (survives MM rewrites), emitted as
  `cardtext` in the product JSON; missing MM relations added add-only
- card copy read from Body Copy (D) with fallback to CTA/Card Copy (E) -
  the workbooks fill either depending on row type
- product detail page <title> now uses seotitle with title fallback
  (provider made singleton and fed from the JSON renderer)
- per-user recent-search badges; last loaded workbook stored per product
  (tx_vitec_product_workbook), Edit Product reopens on it
- composer: add phpoffice/phpspreadsheet ^5.9
- diagnostics: migrations/check_workbook.php

packages/vitec/Configuration/Sets/Vitecset/setup.typoscript

@@ -252,3 +252,29 @@ tt_content {
 # =============================================================================
 page.10.fields.jsonLd = USER
 page.10.fields.jsonLd.userFunc = Evomedien\Vitec\UserFunc\PageJsonLdRenderer->render
+
+############################################################
+# Frontend resolution for the record links from the link
+# browser (page.tsconfig TCEMAIN.linkHandler):
+#   download -> forced download endpoint (DownloadFileMiddleware)
+#   product  -> detail view, same /product/<slug> convention as
+#               the `link` field in the product JSON (page 10)
+# A hidden or deleted target makes the typolink fail -> null.
+############################################################
+
+config.recordLinks {
+    download {
+        forceLink = 1
+        typolink {
+            parameter.cObject = TEXT
+            parameter.cObject.dataWrap = /download/file/{field:uid}
+        }
+    }
+    product {
+        forceLink = 1
+        typolink {
+            parameter.cObject = TEXT
+            parameter.cObject.dataWrap = /product/{field:slug}
+        }
+    }
+}