Shortcode resolution does not work for title in head block when custom partial is set

We had changed the template in a few ways and the typescript code wasn't updated

Just for cross-reference, this is where the change in template was discussed.

• https://github.com/quarto-dev/quarto-cli/issues/8904

it looks like we don't allow users to change the metadata.html partial, so this isn't a problem.

Which partials are we talking about ? AFAIK metadata.html can be modified by user, by providing a file with same filename and setting

format:
  html:
    template-partials:
      - metadata.html

If I try this quickly based on this issue example, I can reproduce the shortcode expansion issue. So I think it is still a problem to fix at some point.

Originally posted by @cderv in https://github.com/quarto-dev/quarto-cli/issues/8987#issuecomment-2187248681

Start by tracing shortcode expansion for the custom metadata.html partial configured through format.html.template-partials, especially where the title in the head block is resolved. Compare the TypeScript handling with the template change discussed in issues 8904 and 8987. Done means shortcodes in that title resolve correctly when users provide a custom metadata.html partial.