feat: Complete InventoryWizard i18n translation with extended field support

Add comprehensive translation keys for all inventory wizard fields and complete
the InventoryWizard component translation from English/Spanish/Basque.

Translation additions (en/es/eu):
- Extended inventory.fields with 48 new field labels and placeholders:
  * Pricing fields (averageCost, standardCost, sellingPrice, minimumPrice)
  * Inventory management fields (lowStockThreshold, reorderPoint, etc.)
  * Product info fields (packageSize, shelfLifeDays, displayLifeHours, etc.)
  * Storage fields (storageInstructions, handlingInstructions, isPerishable)
  * Supplier fields (preferredSupplierId, supplierProductCode)
  * Quality fields (allergenInfo, nutritionalInfo, certifications)
  * Physical properties (weight, volume, dimensions, color)
  * Status tracking (isActive, trackByLot, trackByExpiry, allowNegativeStock)
  * Additional fields (notes, tags, customFields)

- Added ingredientCategories with 10 options (flour, dairy, eggs, fats, etc.)
- Added productCategories with 5 options (bread, pastry, cake, cookies, specialty)

InventoryWizard implementation:
- Translated all section headers (11 sections)
- Translated all field labels (58 fields)
- Translated all placeholder texts (35 placeholders)
- Translated all tooltips using tooltips namespace (11 tooltips)
- Translated ingredient and product category options (15 total)
- Translated wizard step title

Result: Fully internationalized InventoryWizard with complete en/es/eu support
covering all required fields, advanced options, and dynamic category selection.

frontend/src/locales/es/wizards.json

@@ -27,7 +27,55 @@
       "brand": "Marca",
       "brandPlaceholder": "Nombre de marca",
       "description": "Descripción",
-      "descriptionPlaceholder": "Descripción detallada del artículo de inventario"
+      "descriptionPlaceholder": "Descripción detallada del artículo de inventario",
+      "averageCost": "Coste Promedio (€)",
+      "lastPurchasePrice": "Último Precio de Compra (€)",
+      "standardCost": "Coste Estándar (€)",
+      "sellingPrice": "Precio de Venta (€)",
+      "minimumPrice": "Precio Mínimo (€)",
+      "lowStockThreshold": "Umbral de Stock Bajo",
+      "reorderPoint": "Punto de Reorden",
+      "reorderQuantity": "Cantidad de Reorden",
+      "maxStockLevel": "Nivel Máximo de Stock",
+      "leadTimeDays": "Tiempo de Entrega (días)",
+      "packageSize": "Tamaño del Paquete",
+      "packageSizePlaceholder": "Ej: bolsa de 25kg, paquete de 12",
+      "shelfLifeDays": "Vida Útil (días)",
+      "displayLifeHours": "Vida de Exhibición (horas)",
+      "storageTempRange": "Rango de Temperatura de Almacenamiento (°C)",
+      "storageTempMin": "Mín",
+      "storageTempMax": "Máx",
+      "storageInstructions": "Instrucciones de Almacenamiento",
+      "storageInstructionsPlaceholder": "Ej: Almacenar en lugar fresco y seco alejado de la luz directa del sol",
+      "handlingInstructions": "Instrucciones de Manejo",
+      "handlingInstructionsPlaceholder": "Requisitos especiales de manejo",
+      "isPerishable": "Artículo Perecedero",
+      "preferredSupplierId": "ID de Proveedor Preferido",
+      "preferredSupplierIdPlaceholder": "ID del Proveedor",
+      "supplierProductCode": "Código de Producto del Proveedor",
+      "supplierProductCodePlaceholder": "Código del producto del proveedor",
+      "allergenInfo": "Información de Alérgenos",
+      "allergenInfoPlaceholder": "gluten, leche, huevos",
+      "nutritionalInfo": "Información Nutricional",
+      "nutritionalInfoPlaceholder": "calorías:250, proteína:8g, carbohidratos:45g",
+      "certifications": "Certificaciones",
+      "certificationsPlaceholder": "Orgánico, Sin OGM, Kosher",
+      "weight": "Peso (kg)",
+      "volume": "Volumen (L)",
+      "dimensions": "Dimensiones (L×A×A cm)",
+      "dimensionsPlaceholder": "30×20×15",
+      "color": "Color",
+      "colorPlaceholder": "Color del producto",
+      "isActive": "Artículo Activo",
+      "trackByLot": "Rastrear por Lote/Batch",
+      "trackByExpiry": "Rastrear por Fecha de Vencimiento",
+      "allowNegativeStock": "Permitir Stock Negativo",
+      "notes": "Notas",
+      "notesPlaceholder": "Notas adicionales sobre este artículo",
+      "tags": "Etiquetas",
+      "tagsPlaceholder": "orgánico, premium, estacional",
+      "customFields": "Campos Personalizados (JSON)",
+      "customFieldsPlaceholder": "{\"campo_personalizado\": \"valor\"}"
     },
     "sections": {
       "basicInformation": "Información Básica",
@@ -59,6 +107,27 @@
       "dozen": "Docena",
       "lb": "Libras (lb)",
       "oz": "Onzas (oz)"
+    },
+    "ingredientCategories": {
+      "select": "Seleccionar...",
+      "flour": "Harinas",
+      "dairy": "Lácteos",
+      "eggs": "Huevos",
+      "fats": "Grasas y Aceites",
+      "sweeteners": "Endulzantes",
+      "additives": "Aditivos",
+      "fruits": "Frutas",
+      "nuts": "Nueces y Semillas",
+      "spices": "Especias",
+      "leavening": "Agentes Leudantes"
+    },
+    "productCategories": {
+      "select": "Seleccionar...",
+      "bread": "Pan",
+      "pastry": "Pastelería",
+      "cake": "Tortas",
+      "cookies": "Galletas",
+      "specialty": "Artículos Especiales"
     }
   },
   "qualityTemplate": {