MobileDashboardLayoutItem

id
Type: string
required

Card instance id (registry type, or ${type}-copy-<hex>)
order
Type: number
required

0-based position in the single column
type
Type: string
required

Registry key, e.g. "placeholder" / "hot-tickers"
size
Type: string enum

Coarse height hint
values
- sm
- md
- lg