I have searched for equivalent feature request, but found none…
Many users are using HACS vertical-stack-in card and stack-in card to create custom cards that “fuse” two or more cards into one.
It would be very interesting to have in HA core cards with one of the two solutions below:
an integrated equivalent of those HACS cards, allowing to “fuse” several cards into one single card with a title, and for the less advanced user, with the graphic user interface working same as the grid, horizontal or vertical stack cards available in the core.
or
an update of the current core cards: grid, horizontal, vertical stack cards currently available in HA core allowing either:
to fuse the content inside into one single card (thus suppressing borders and fusing backgrounds of the cards inside)
OR
to “frame” those cards with a customisable border and a customisable background.
While of course keeping the UI working for the basic users who are not YAML enthusiasts.
My preferred solution would be to have the following simple options into the core cards (grid, horizontal stack and vertical stack cards):
be able to have a frame around the card (like any other cards).
be able to apply the default background color in the card.
This would be a very simple way to create “simple” custom cards for the beginner, without having to use custom cards not supporting UI.
A simple tick box in the UI allowing the user to choose if the card is:
with border (default false)
with background (default false)
Or a way to define the border and background colors (none, default, color-code) (maybe in YAML only for the more advanced users)…
Cherry on the cake could be to remove the borders of the card embedded into the grid/stack, but it is not even mandatory to allow many usages of this kind of cards.