Try to find perlite or pumice and mix it in your media, the grittier it is the better. That will help your plant's shallow root system to have better drainage and air flow at root zone.
I am looking again at your photos, the 2nd photo shows some nodes on the branches are slightly bulging, so it is indeed trying to redirect energies to new growth, pretty soon there will be new leaves there. And I also see some roots near the tip of some of the branches closest to the window. You can cut a node below the root area, apply cinnamon on the cut edge and stick the cutting in a very well draining media, instant new baby plant for you.
