Supervisor "borrows" ideas


I defended my PhD earlier this year. Suddenly, my supervisor who up until my defence had no idea on what my findings were and what I was working on submitted a research proposal for funding that quite looks similar to what my PhD was about with little subtle and diplomatic changes....What do I do? I am mad. Is this what academia is like? Is my project his now? Is this why he wanted me to put him as a co-author everywhere?