background is {color:, image:} and only a mapping at every level; the board's image paints the full window under a transparent title bar, with a thin-material frost strip keeping the chrome legible and the standard accommodations intact.
Claude-Session: https://claude.ai/code/session_014PtZdPwqZuqEDLc6wZMtEy
A demo board exercising the full breadth of the storage contract: several
lanes, several cards, body text, styling, and unknown/reserved frontmatter
keys living alongside the schema-owned ones.
Nothing here is special-cased — it's an ordinary board.