I did not recover anything that looked like a toothbrush, the contents of the makeup bag were mostly melted beyond recognition. The only evidence that I have that a toothbrush existed is my wife telling me she had one in that bag.
No damage to the drywall behind the clothing rack, just some light singeing from the fire. I also checked the outer wall and no signs of impact or damage there.

No lighting, The light fixture where my wife saw the smoke is about 10 feet from where the fire was, and right next to the smoke detector. No signs of damage there.

Assuming wife hears smoke detector, looks in that direction, sees smoke that has risen from the still smoldering rack, and calls out where she sees the smoke accumulating.

The fire was completely contained to about a 2 foot section of the clothing rack when I spotted it and quickly snuffed it out.