Mermaid url expansion

[dmi3kno]

Quarto is very fluent in creating the relative references within the context of a website. For example, I can write [link](about.qmd) and Quarto will automatically resolve the reference and update the URL relative to the top-level URL of the website specified as site-url in _quarto.yml

In Mermaid flowchart diagrams it is possible to add href to nodes

```mermaid
flowchart TD
  A[this] --> B[that]
  click B "https://example.com/about.html" "Tooltip text"

I would like to be able to write relative URLs following the node identifier.

```mermaid
flowchart TD
  A[this] --> B[that]
  click B "about.qmd" "Tooltip text"

And rely on Quarto to resolve the URL for me prior to rendering, the same way it does right now for the links embedded in markdown. Do you think this would be possible?

For the avoidance of doubt, this seems to work today

```mermaid
flowchart TD
  A[this] --> B[that]
  click B "./about.html" "Tooltip text"

Which is great! I wonder it can accept .qmd links