Firstly I really want to say I do love your app, it is a very good and helpful for me to manage my project. But would it be okay to add a function of sth like Gantt chart as it is already implemented timeline. Or sth like report function, thank u and I will kept using it and support your app.
I doubt we will add a Gantt chart. That is very specific to project planning tools, and we need to keep Agenda focussed on note taking.
What I recommend is to find a good tool for Gantt charts, and copy/drag in the charts as images or file attachments. You can then view them in Agenda. You can also link to a Gantt chart document, by dragging it into Agenda, and holding down CTRL when you drop the file in Agenda.
Hope that helps!