{
id: "image",
type: "image",
src: "https://cdn.acme.dev/campaign.png",
alt: "Visuel de la campagne",
href: "",
width: "full",
overlay: "none",
rounded: true,
}With no src the block renders its upload state, which calls the editor's
onUploadImage and expects a URL back.
overlay: "play" composites a play badge over the image. No email client plays
an embedded video, so a video is a thumbnail that links out.