# `GET /article/export.zip`

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

Export articles as ZIP

Builds an `artikel.zip` for the authenticated user's selected company.
`categoryId` (optional) restricts the export to that category and below;
it must be reachable via the company's root category. Defaults to the
whole company root tree.
The ZIP contains `artikel.csv` (semicolon-separated, Windows-1252)
plus one AVIF entry per article image, named `<fullHash>.avif`
(content-addressed, so shared hashes are deduplicated).


## Query parameters

| Param | Required | Type | Description |
|-------|----------|------|-------------|
| `categoryId` | no | integer | Restrict export to this category subtree |

## Response `200`

ZIP archive

## Errors

| Status | Description |
|--------|-------------|
| 400 | No company selected — `{"error":"…"}` |
| 401 | Unauthorized — `{"error":"…"}` |
| 403 | Not authorized — `{"error":"…"}` |
| 404 | Company not found — `{"error":"…"}` |

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