I wear Mtb shoes, I have two pairs, the ones with flexible bottoms for commuting, since I have to walk in them when I stop by the store or get food.

The other pair have hard soles they are for strictly riding, walking in them is horrible.

I carry my work boots in a pannier, because there are no empty lockers at work. When I had a locker I would leave my boots at work. I bought a pair of canvas kung fu shoes and folded them up in my trunk bag and slip them on if I plan on walking a bit.

So I've seen zip up shoes on Amazon that would work awesome for commuting. Also you could try folding flip flops.

I also use double sided pedals, spd on one side and platform on the other, for the days I wear sneakers to run a quick errand around the corner and don't feel like wearing my spd shoes.