Cast display issue with Heading Card dot separator for displayed elements

[sethgregory]

Checklist

• I have updated to the latest available Home Assistant version.
• I have cleared the cache of my browser.
• I have tried a different browser to see if it is related to my browser.
• I have tried reproducing the issue in safe mode to rule out problems with unsupported custom resources.

Describe the issue you are experiencing

When editing the appearance of an entity within a heading card, the option is given to select multiple displayed elements from that entity, for instance:

In practice, this results in multiple values being displayed, separated by an interpunct/middot as such:

When casting this dashboard to a Nest Hub, unfortunately, these glyphs do not display properly and are instead shown as what I assume are its replacement characters (e.g., "�") :

When asking about this on the HA Discord I was advised that this may be a bug, and to submit an issue here. However, I wonder whether this glyph simply does not exist in the font being used on the cast device. This may be solvable by making the separator character configurable.

Describe the behavior you expected

Interpunct character displays correctly on cast target devices as separator

Steps to reproduce the issue

1. Add a Heading Card to a dashboard referencing an entity that has multiple elements, select multiple elements for display.
2. Verify that it displays in a web browser or mobile app with interpunct characters separating the elements.
3. Cast the dashboard to a Google Home Hub / Nest Hub device and verify that these characters do not display properly
   ...

What version of Home Assistant Core has the issue?

core-2024.11.2

What was the last working version of Home Assistant Core?

No response

In which browser are you experiencing the issue with?

Google Nest Hub cast target (latest)

Which operating system are you using to run this browser?

Google Nest Hub

State of relevant entities

No response

Problem-relevant frontend configuration

No response

Javascript errors shown in your browser console/inspector

No response

Additional information

No response