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

locales/fr.json

@@ -40,16 +40,6 @@
     "retry": "Réessayer",
     "offline": "Pas de connexion internet"
   },
-  "categories": {
-    "electronics": "Électronique",
-    "furniture": "Meubles",
-    "clothing": "Vêtements",
-    "vehicles": "Véhicules",
-    "sports": "Sports & Loisirs",
-    "books": "Livres & Médias",
-    "garden": "Jardin",
-    "other": "Autres"
-  },
   "search": {
     "title": "Recherche",
     "placeholder": "Entrez un terme de recherche...",
@@ -76,43 +66,6 @@
     "sortPriceDesc": "Prix décroissant",
     "sortDistance": "À proximité"
   },
-  "subcategories": {
-    "phones": "Téléphones & Tablettes",
-    "computers": "Ordinateurs & Accessoires",
-    "tv_audio": "TV & Audio",
-    "gaming": "Jeux & Consoles",
-    "appliances": "Électroménager",
-    "cars": "Voitures",
-    "motorcycles": "Motos",
-    "bikes": "Vélos",
-    "parts": "Pièces & Accessoires",
-    "living": "Salon",
-    "bedroom": "Chambre",
-    "office": "Bureau",
-    "outdoor_furniture": "Mobilier extérieur",
-    "women": "Femmes",
-    "men": "Hommes",
-    "kids": "Enfants",
-    "shoes": "Chaussures",
-    "accessories": "Accessoires",
-    "fitness": "Fitness",
-    "outdoor": "Plein air",
-    "winter": "Sports d'hiver",
-    "water": "Sports nautiques",
-    "team_sports": "Sports d'équipe",
-    "fiction": "Fiction",
-    "nonfiction": "Non-fiction",
-    "textbooks": "Manuels scolaires",
-    "music_movies": "Musique & Films",
-    "plants": "Plantes",
-    "tools": "Outils",
-    "outdoor_living": "Vie extérieure",
-    "decoration": "Décoration",
-    "collectibles": "Objets de collection",
-    "art": "Art",
-    "handmade": "Fait main",
-    "services": "Services"
-  },
   "countries": {
     "ch": "Suisse",
     "de": "Allemagne",