For the record, it’s not my idea to search for a Katy Perry song on Pandora. The request for “Firework” comes during a recent trip with my 5-year-old daughter, who’s getting antsier by the minute as we wait to board our flight to Arizona for a wedding. Eager to avoid a meltdown, I launch the app and suffer through a random audio ad for Panera Bread that ends after 15 seconds or so. But the sandwich chain isn’t done with me.