Add margin to box headings

src/musicplayer/ui/plot.gleam

@@ -57,8 +57,9 @@ pub fn box_with_heading(
   height: Int,
   heading: String,
 ) -> Buffer {
+  let heading_margin = 1
   box(buffer, x, y, width, height)
-  |> text(heading, x, y)
+  |> text(heading, x + heading_margin, y)
 }
 
 fn horizontal_line(