Not a single rider but a group so I say "This is BS on her part"! Obviously occupied with something more important that watching the road while driving. I don't think your choice of light,whether blinkey or flood light would have mattered. It's a shame, glad it wasn't worse.
It’s possible. But lights and high viz jersey may help.
When we heard the story we figured she was texting but driver was older, she was very apologetic and stayed on the scene. Still sucks, of course. You can’t prevent every incident/accident/crash, but we try our best.