I appeal to the Moodle community, after a long week of research and testing without conclusion.
My wish would be to insert a new tab in the left menu (sandwich menu). Based on the Moove theme (which I slightly customized + Moodle 3.9), I installed the "Boost Navigation" plugin (https://moodle.org/plugins/local_boostnavigation) to add a tab easily.
My problem concerns the creation of the page to which the tab is attached: if I understood correctly a php page (/ theme / moove / layout /) calls the other necessary files (mustache, js, ...).
But I can't do it with all the Moodle architecture, even in comparison with the other pages already created ... Something must escape me!
Thank you in advance,