fix(store,l10n): localize canonical category labels + store segment

The grouped store showed the hub's English category labels verbatim
(Documents, Data & Formats) even in German. Map the canonical slug to
DE/EN via l10n (storeCat*), and localize the Modules/Studio segment
(storeSegment*). Falls back to the hub label for an unknown slug.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_de.arb

@@ -327,6 +327,17 @@
   "storeCategoryChannel": "Kanäle",
   "storeCategoryWeb": "Web",
   "storeCategoryOrchestrator": "Orchestrierung",
+  "storeCatDocuments": "Dokumente",
+  "storeCatTextLanguage": "Text & Sprache",
+  "storeCatData": "Daten & Formate",
+  "storeCatAiLlm": "KI & LLM",
+  "storeCatWebApi": "Web & APIs",
+  "storeCatAnalysisDomain": "Analyse & Domäne",
+  "storeCatStudioThemes": "Studio & Themes",
+  "storeCatExamplesDev": "Beispiele & Dev",
+  "storeCatOther": "Sonstiges",
+  "storeSegmentModules": "Module",
+  "storeSegmentStudio": "Studio & Themes",
   "storeNResults": "{n} Treffer",
   "@storeNResults": {
     "placeholders": {