Option to permanently display Ghostmap

[stefanknnn]

Checklist

• [ x ] I am running the latest version of the card
• [ x ] I checked if there isn't another feature request opened with the same request
• [ x ] I checked that the feature is not already available in the dev branch

Is your feature request related to a problem? Please describe. The ghostmap is a brilliant feature for seeing the historical distribution of VPD. However, needing to hover or click to activate it on each chart makes it less convenient when I am monitoring many different plants, each with its own VPD chart. I would like to be able to see the historical context for all my plants at a glance without needing to interact with every single card repeatedly.

Describe the solution you'd like I would love to see an option added, maybe something like always_show_ghostmap: true (boolean), that would keep the ghostmap layer visible on the chart all the time, alongside the current VPD line.

Describe alternatives you've considered The current hover or click activation is the existing method. While functional, it requires constant interaction for an overview of multiple charts.

Additional context First off, thank you so much for creating this plugin! It is incredibly well-made and genuinely helpful for optimizing plant environments. The ghostmap is already a fantastic feature. Adding an "always on" option would be a wonderful enhancement for users with multiple charts, making their dashboard even more powerful for monitoring diverse plant collections quickly.

[mentalilll]

Hey, have you already seen the new upcoming ghostmap?

Would you also need that feature for the new Ghostmap? The old one isn't as accurate as I wished, that's why I currently overhaul it.

[stefanknnn]

Hey, no, I didn't, but i am happy to see that you are activly working on it. What is this overlay supposed to show? the history as text?

I really like the dots on the map to have a quick overview. By the way, it would be even better if it was a path... like a line. It's sometimes hard to see what the path was.

To give you an idea of how I use it: I have about 15 VPD charts in a dashboard on a tablet in my greenhouse for different species. I activate all the ghostmaps by tapping on the room name, but when the dashboard refreshes, I have to do it all over again.