{
  "category": "supplements",
  "grid": { "cols": 12, "rows": 5 },
  "items": [
    { "id": "preworkout", "name": "Pre-workout", "qty": 12, "unit": "servings", "icon": "/assets/inventory/preworkout.png", "w": 1, "h": 1 },
    { "id": "creatine", "name": "Creatine", "qty": 400, "unit": "g", "icon": "/assets/inventory/creatine.png", "w": 1, "h": 1 }
  ]
}