Look, there are many people that wil tell you salt is evil and they should never have it.
However, salt is actually ESSENTIAL to the body's function, in many ways.

When your kids are older and eating processed foods, etc, then salt intake becomes a real issue as it is for you or I.
However, when the child is not eating ANY salt, this is a very big issue. If you DD is eating some salted foods, that is not dangerous, nor the end of hte world. It is actually quite healthy in modereation. Now I wouldnt give her a chorizo to chew on but ceratinly mash with salt in it, because that is what you are eating is not bad. When you think about salt content you need to apply it to the whole of her intake and the whole amount in the food you made. So for a mash made from 6 potatoes you may have put in a tsp of salt. So in the teaspoon or so she will eat at this age the amount of salt in that is minimal.

I always cook with salt (chef, cant help it lol) and Charlotte was BLS from 7 months when she started eating.
I do not add salt to steamed vegies, etc, anyway, so any salt is only in a main meal like dinner if it is a cooked stew, sauce etc.

Putting salt in pasta water will not add to her salt intake either, BTW, nor will putting salt in your potato water

WRT to bread, there you may need to think about how much she is eating and what type - bread (white or highly processed) flour can be very binding in the gut and cause costipation and cramping. White flours and processed foods can do this. Bread also contains salt
I think I didn't give Charlotte bread until she was about 9 months, a couple of months after she started solids. I found the stewed fruits and vegies enough. She did however also eat porridge ( i used to pulse the quick oats a few times in the blender the first few times she had it. Too this day her fav food is prridge - she would eat it all day every day if I let her! lol so healthy and filling. A few spoons for breakfast every morning is how we started.

Follow your instincts, you are going well and she will guide you