1616 Walnut St., PhiladelphiaFor Dana Bank, life is like a box of chocolates. “When I was looking for a home for my store,” says Bank, “I saw this adorable little chocolate shop. I told my broker, ‘I want something like that.’?” So when the 2008 recession swallowed the chocolatier, Bank crammed into the nook on 1616 Walnut St. Photographs by Peter Chin TownHome is an exquisite confection of charms, bracelets, necklaces, and earrings in every flavor. They fill 258 square feet on Philadelphia’s premier shopping street. “Yeah, it’s tiny,” Bank says with a shrug. “But it’s me. I’m always changing it up.” And in the TownHome box, you never know what you’re going to get.STERLING SILVER LININGSBank grew up in an upscale Philadelphia suburb and was a high school classmate of actor Bradley Cooper. She named her store after an age-old Philly ­expressio