Being the denizen of a tiny, windowless half-bathroom that’s earned the nickname “the dungeon” comes with one big responsibility: namely, wielding my decorative powers to transform it into a haven of restoration and peace that no longer resembles a dusty utility room that doubles as a temporary hideaway for scary movie characters. I finally released my resistance to the process of home improvement and stopped tiptoeing around my petite bathroom in fear of knocking over toiletries, cleaning supplies, and beauty products (a glass bottle of moisturizer was one of many casualties). A pink checkered bath mat made it feel a…