FR allow core graph cards in footer

[Mariusthvdb]

we can use https://www.home-assistant.io/dashboards/header-footer/#graph-header--footer to add a type: graph. however, none of the core (energy) graph cards can be added in the footer.

We can use the custom:mini-graph-card to do this

footer:
  type: custom:mini-graph-card
  entities:
    - entity: sensor.netto_verbruik

or, hack the system by using the hui-element custom plugin (note we can Not hack it by using the type: custom:hui-statistics-grap-card trick)

footer
   type: custom:hui-element
   entities:
     - entity: sensor.netto_verbruik
   card_type: statistics-graph
   days_to_show: 1

and show the statistics card after all.

we can even show the energy graph in an entities card footer like that:

footer:
  type: custom:hui-element
  card_type: energy-usage-graph

This fr is to ask for core Frontend to support the core (energy) graph cards without anything custom.

related community post:https://community.home-assistant.io/t/why-cant-we-use-any-core-graph-card-but-type-graph-in-a-footer/881407