use j and k to navigate through the cards

internal/ui/column.go

@@ -37,6 +37,18 @@ func (u *UI) newColumn(statusID int, statusName string) column {
 			u.shiftColumnFocus(shiftLeft)
 		case 'l':
 			u.shiftColumnFocus(shiftRight)
+		case 'j':
+			cur := cards.GetCurrentItem()
+			if cur == cards.GetItemCount()-1 {
+				cur = 0
+			} else {
+				cur++
+			}
+			cards.SetCurrentItem(cur)
+		case 'k':
+			cur := cards.GetCurrentItem()
+			cur--
+			cards.SetCurrentItem(cur)
 		}
 
 		return event