Thank you for your feedback !

The idea is to place this proposal between the CLI Sauvage and the very (too?) busy Grafana graph.
Something plug and play, and lightweight. I attach importance to having a pleasant and “efficient” UX/UI. The idea is really to have a summary view that is sufficient.
Regarding the banner, there is already a banner at the top that indicates whether the backend and the Bitcoin node are available.
But perhaps I have misunderstood your needs?