Man I think that you may have perhaps fallen into a trap that I got into myself many times. You design a story or idea in your head and then you are trying to create a logline for it. If that;s the case, then I would suggest to first design a logline and then create a story for it.
The note about paralysed mother is a back story that doesnt need to be there as she may play a part as a motivation but its not directly inside the A story. Stakes are not high enough. What happens if she loses the competition? Loses the art robot and goes home? How wining that competition helps her to expose the truth? and who is the antagonist? The mentor or the corporation?
I think that you really like the idea of robotics competition. But it might be hard to implement it as a major event to work in this kind of story.
Hero: teen student of robotics
Main Goal: win robotics competition or frame judas mentor for plagiarism.
Antagonist forces: mentor who wants to prevent her from wining or prevent her fron exposing him
Inciting incident: invention is stolen.
But still i dont see very high stakes. Will think about it