refactor: replace hardcoded categories with Directus-powered category tree and translations

locales/de.json

@@ -40,16 +40,6 @@
     "retry": "Erneut versuchen",
     "offline": "Keine Internetverbindung"
   },
-  "categories": {
-    "electronics": "Elektronik",
-    "furniture": "Möbel",
-    "clothing": "Kleidung",
-    "vehicles": "Fahrzeuge",
-    "sports": "Sport & Freizeit",
-    "books": "Bücher & Medien",
-    "garden": "Garten",
-    "other": "Sonstiges"
-  },
   "search": {
     "title": "Suche",
     "placeholder": "Suchbegriff eingeben...",
@@ -76,43 +66,6 @@
     "sortPriceDesc": "Preis absteigend",
     "sortDistance": "In der Nähe"
   },
-  "subcategories": {
-    "phones": "Handy & Telefon",
-    "computers": "Computer & Zubehör",
-    "tv_audio": "TV & Audio",
-    "gaming": "Gaming & Konsolen",
-    "appliances": "Haushaltsgeräte",
-    "cars": "Autos",
-    "motorcycles": "Motorräder",
-    "bikes": "Fahrräder",
-    "parts": "Ersatzteile & Zubehör",
-    "living": "Wohnzimmer",
-    "bedroom": "Schlafzimmer",
-    "office": "Büro",
-    "outdoor_furniture": "Gartenmöbel",
-    "women": "Damen",
-    "men": "Herren",
-    "kids": "Kinder",
-    "shoes": "Schuhe",
-    "accessories": "Accessoires",
-    "fitness": "Fitness",
-    "outdoor": "Outdoor",
-    "winter": "Wintersport",
-    "water": "Wassersport",
-    "team_sports": "Mannschaftssport",
-    "fiction": "Belletristik",
-    "nonfiction": "Sachbücher",
-    "textbooks": "Lehrbücher",
-    "music_movies": "Musik & Filme",
-    "plants": "Pflanzen",
-    "tools": "Werkzeuge",
-    "outdoor_living": "Outdoor-Living",
-    "decoration": "Dekoration",
-    "collectibles": "Sammlerstücke",
-    "art": "Kunst",
-    "handmade": "Handgemacht",
-    "services": "Dienstleistungen"
-  },
   "countries": {
     "ch": "Schweiz",
     "de": "Deutschland",