Send a restaurant's menu to Eatzino straight from the website's code

Connect this website's menu to Eatzino (restaurant id <RESTAURANT_ID>).
Read the API guide at https://eatzino.com/developers/ai.md and follow it exactly.
- API key: read it from the environment variable EATZINO_API_KEY. Never put it in browser code or commit it to git.
- Build the menu JSON from the menu data in this codebase: categories, dishes, prices, descriptions, photos, choices (sizes), add-ons, allergens. Use stable ids.
- Send it with ?dry_run=1 first and show me the summary. Then send it for real.
- Add Eatzino online ordering to the site with the embed script.
- Add a small script (e.g. "npm run eatzino:sync") so the menu can be sent again after changes.

Authorization: Bearer ezk_…

{
  "language": "en",
  "mode": "merge",
  "categories": [
    {
      "id": "pizza",
      "name": {"en": "Pizza", "de": "Pizza"},
      "description": "Stone-baked, 30 cm",
      "dishes": [
        {
          "id": "margherita",
          "name": {"en": "Pizza Margherita", "de": "Pizza Margherita"},
          "description": {"en": "Tomato, mozzarella, basil",
                          "de": "Tomate, Mozzarella, Basilikum"},
          "price": 9.5,
          "image": "https://example.com/img/margherita.jpg",
          "available": true,
          "labels": ["vegetarian"],
          "allergens": ["gluten", "milk"],
          "additives": [],
          "options": [
            {"id": "size", "name": {"en": "Size", "de": "Größe"},
             "choices": [{"name": "26 cm", "price": 0},
                         {"name": "32 cm", "price": 3}]}
          ],
          "addons": ["extra-cheese"]
        }
      ]
    }
  ],
  "addons": [
    {"id": "extra-cheese", "name": {"en": "Extra cheese", "de": "Extra Käse"}, "price": 1.5}
  ]
}

{
  "ok": true,
  "dry_run": false,
  "mode": "merge",
  "summary": {
    "categories": {"created": 1, "updated": 0, "unchanged": 0, "removed": 0},
    "dishes":     {"created": 1, "updated": 0, "unchanged": 0, "removed": 0},
    "addons":     {"created": 0, "updated": 0, "unchanged": 0, "removed": 0},
    "images":     {"downloaded": 1, "failed": 0, "not_checked": 0}
  },
  "warnings": [],
  "menu_url": "https://eatzino.com/en/your-city/restaurant/your-restaurant"
}

# sold out
curl -X PATCH https://api.eatzino.com/api/v1/connect/dishes/margherita \
  -H "Authorization: Bearer $EATZINO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"available": false}'

# new price – choices move with it
curl -X PATCH https://api.eatzino.com/api/v1/connect/dishes/margherita \
  -H "Authorization: Bearer $EATZINO_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"price": 10.5}'

curl -X POST https://api.eatzino.com/api/v1/connect/images \
  -H "Authorization: Bearer $EATZINO_API_KEY" \
  -F "file=@public/images/margherita.jpg"

# → {"ok": true, "url": "https://api.eatzino.com/storage/images/products/…jpg"}

{
  "ok": false,
  "error": {
    "code": "invalid_menu",
    "message": "Nothing was saved. Fix the fields listed in \"details\" and send again.",
    "details": [
      {"path": "categories[0].dishes[2].price",
       "message": "Must be more than 0 – dishes without a price are not shown"},
      {"path": "categories[1].dishes[0].allergens[0]",
       "message": "Unknown allergen \"peanutbutter\". Allowed: gluten, crustaceans, …"}
    ]
  }
}

<!-- once, before </body> – 123 = your restaurant id -->
<script src="https://eatzino.com/embed.js" data-shop="123" async></script>

<!-- any link or button opens ordering -->
<a href="#eatzino-order">Order online</a>

<!-- open one dish (eatzino_id from GET /menu) -->
<button data-eatzino-order data-eatzino-product="EATZINO_ID">Order</button>

<!-- the ordering menu inside your page -->
<div data-eatzino-menu data-height="800"></div>

// scripts/eatzino-sync.mjs  –  node scripts/eatzino-sync.mjs [--dry]
import menuData from "../data/menu.json" with { type: "json" }; // your menu data

const API = "https://api.eatzino.com/api/v1/connect";
const KEY = process.env.EATZINO_API_KEY;
if (!KEY) throw new Error("Set EATZINO_API_KEY");

const menu = {
  mode: "replace",
  categories: menuData.sections.map((s) => ({
    id: s.slug,
    name: s.title,
    dishes: s.items.map((d) => ({
      id: d.slug, name: d.name, description: d.description ?? "",
      price: Number(d.price),
    })),
  })),
};

const dry = process.argv.includes("--dry") ? "?dry_run=1" : "";
const res = await fetch(`${API}/menu${dry}`, {
  method: "PUT",
  headers: { Authorization: `Bearer ${KEY}`, "Content-Type": "application/json" },
  body: JSON.stringify(menu),
});
const out = await res.json();
if (!out.ok) {
  console.error(out.error.message, out.error.details ?? "");
  process.exit(1);
}
console.log(out.dry_run ? "Dry run:" : "Synced:", out.summary);