# `POST /company`

Protected. Requires a valid session cookie (`credentials: 'include'`).

Create company

Creates a company and selects it for the current user.

## Body (JSON)

```json
{
  "iso639": "de",
  "name": "Acme GmbH",
  "taxrate": 19,
  "reducedtaxrate": 7
}
```

## Response `201`

Created; selected company updated

```json
{
  "company": { … },
  "user": { … }
}
```

## Errors

| Status | Description |
|--------|-------------|
| 400 | Validation error — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 409 | Company name not available — `{"error":"…"}` |

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