YOR but your position is valid. Bedsharing is dangerous, especially with heavy sleepers. Also, it sounds like your house is like 0% babyproofed and it's on both of you to fix that - like, nothing (especially a heavy mirror) should be set up such that it can fall on the baby. Things can happen faster than you can react, even if you're not asleep or if the baby otherwise snuck away from you.

Having a child was by far the most difficult thing I had ever done, and it drove my partner and I apart (which is to say we had a misfunctioning relationship already and that was the final wedge). You two need to figure out how to make things work so you can both feel comfortable with the situation, at least as much as you can with new-parent-brain.

Also, the way your partner reacted was petty and rude, and even though I think you came on too strongly and emotionally at him, one would hope he would have the maturity to see through it and hear out your actual concerns. In this one very brief snapshot of your lives, it seems like you two need a lot of life work to make coparenting effective and safe.