To improve the interface and navigation within the notes, it would be helpful to distinguish internal links (wikilinks) more clearly from external links. One possible solution could be to add a specific visual indicator to signal that a link leads outside the note system.
This distinction seems important to me, as one of the goals of these notes is to allow smooth and coherent navigation within the system. When a link redirects to an external resource, it interrupts this flow. Therefore, informing the reader more explicitly than the current presentation would be relevant.