I have questions about Java Versions needed for setting up a %JDBC External Language Server

I'm trying to start the %JDBC. External Language Server my local instance of IRIS (2023.1.2). I've recently upgraded Java to version 21.0.1

When starting the External Language Server, I get this error message:

How to query BLOB type data in MYSQL database through JDBC or ODBC

In HealthShare, we can add any new application that will show up in the left menu of the viewer. I am trying to add new navigation entries that will look like 'patient search' popup.

- Is Intersystems sharing its HealthShare style? They are using material tags, but it looks very different that the default material themes. I probably can pick up the style, but perhaps there is an official way.
- Is there a way to do a popup like patient search? So far I see, a new option is associated to an url not some javascript code?

Thank you for your help.