styling of table inside text box/shape

[gomarcus]

• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the issue tracker for a feature request that matches the one I want to file, without success.

Is your feature request related to a problem? Please describe.
[my version: v24.6.4]. As a newbie of draw.io the current way of styling tables seems a big unintuitive. For example changing the border for the hole table requires currently all cells to be selected. But tables seem to be currently created without any border. Providing the user with little visible feedback whether any tables has been inserted.

Describe the solution you'd like
#1 would be nice, if tables would be initialized with a 1px solid black border.
#2 would love if every canvas had a single CSS file for defining the default settings/styles for elements