The imminent arrival of authentic Vietnamese pho (a meal-in-a-bowl noodle soup) in an inviting Columbia Heights storefront – appropriately named Pho 14 – is eagerly awaited by budget-minded, local foodies. A mix of traditional and modern touches – including a fountain and grassy canopy – pretty up this locale that will serve rice and noodle dishes and banh mi, in addition to 19 variations of its namesake specialty (1436 Park Rd.).