Filter format cannot be set via JSON configuration file; how to set the default value to SVG? Width cannot be set via code block attribute

[Antescriptor]

Allow me to express my gratitude for this great tool.

Coming to the point, given the issue laid out in the first part of the title which has a significant negative impact on the use of Zettlr considering that configuration via code block makes diagrams disappear before export, if it is not possible to let the user set the filter format by means of the JSON configuration file, I would, then, like to ask you how can the default value be set to SVG.

Moreover, I would like to point out that the diagram width cannot be set via the attribute in the delimited code block, or, at least, {.mermaid width=x} does not work for me with Zettlr.

Thank you.