They want to be able to, at category level, prompt a "clear list" to pop up where people can mark certain areas on the list as cleared.  So for missing child, to mark off, for example, "Gymnasium" cleared, and other locations as they clear them.

I used Claud to create a prototype visible here: https://clearlocations.netlify.app

I uploaded HTML for the vibe-coded app if ENG wants to take and embed as another category-enabled feature like Plans and Notes.