# API Contracts: Migration Dashboard Grid

## Endpoints

### GET /api/migration/dashboards

Fetch a list of dashboards from the specified source environment.

**Request:**
- **Headers**:
  - `x-source-env-id`: `string` (UUID of the source environment configuration)

**Response:**
- **Status**: `200 OK`
- **Body**: `List[Dashboard]`

```json
[
  {
    "id": 101,
    "title": "Sales Overview",
    "changed_on": "2023-10-27T14:30:00Z",
    "published": true,
    "url": "/superset/dashboard/sales-overview/"
  },
  {
    "id": 102,
    "title": "Marketing Draft",
    "changed_on": "2023-10-26T09:15:00Z",
    "published": false,
    "url": "/superset/dashboard/marketing-draft/"
  }
]
```

**Errors:**
- `400 Bad Request`: Missing environment ID header.
- `404 Not Found`: Environment configuration not found.
- `502 Bad Gateway`: Error communicating with Superset.

## Python Definitions

```python
# [DEF:backend.src.api.routes.migration.get_dashboards:Function]
# @PURPOSE: Fetch dashboards from the specified source environment.
# @PRE:     Header 'x-source-env-id' must be a valid environment UUID.
# @POST:    Returns a list of Dashboard models with id, title, changed_on, and published status.
# @PARAM:   source_env_id (str) - UUID of the source environment.
# @RETURN:  List[DashboardModel]