# Update Highlight

Update an existing highlight.

**Endpoint**: `PUT /api/media-items/highlights/{highlight_id}`
**Auth**: Required
**Content-Type**: `application/json`

## Path Parameters

| Parameter    | Type   | Required | Description    |
| ------------ | ------ | -------- | -------------- |
| highlight_id | string | Yes      | Highlight UUID |

## Request Body

| Field          | Type   | Required | Description                   |
| -------------- | ------ | -------- | ----------------------------- |
| selection_text | string | No       | Updated highlighted text      |
| color          | string | No       | Updated highlight color (hex) |

### Example Request

```json
{
  "selection_text": "Updated text",
  "color": "#00ff00"
}
```

## Response (200 OK)

```json
{
  "id": "uuid",
  "media_item_id": "uuid",
  "user_id": "uuid",
  "selection_text": "Updated text",
  "color": "#00ff00",
  "updated_at": "2026-01-31T10:00:00Z"
}
```

## Error Responses

| Code | Description                      |
| ---- | -------------------------------- |
| 400  | Invalid highlight data           |
| 401  | Invalid or expired token         |
| 403  | User does not own this highlight |
| 404  | Highlight not found              |
