Big API refactor

kiln-tui/src/render.rs

@@ -25,7 +25,7 @@ pub struct BoardWidget<'a> {
 impl<'a> BoardWidget<'a> {
     /// Creates a widget that renders `board`, scrolling to follow the player.
     pub fn new(board: &'a Board) -> Self {
-        let focus = (board.player.x, board.player.y);
+        let focus = (board.player.x as i32, board.player.y as i32);
         Self { board, focus }
     }