Cleaning up my first dead-out (queen failure, not disease) — what's actually safe to reuse?

Found my weakest colony dead this week — the one I'd been watching since the queen went patchy in July. Post-mortem: maybe two hundred dead bees, a little scattered capped drone brood in worker cells, no queen to be found, plenty of honey untouched. My mentor looked with me and we're confident it's queen failure that dwindled out, not disease — no foul smell, cappings look normal, no scale in the cells, ropey test negative just to be sure. So now I have a full deep of drawn comb and maybe eight frames of honey. Second-year me wants to salvage everything for spring. What's the protocol? I've read: freeze frames 48-72 hours for wax moth, then store sealed. Do I need to do anything to the box itself — people mention scorching with a torch but that seems like disease-outbreak territory, not this. And is the honey fair game for feeding other colonies, or is that how you spread problems you didn't know you had?