Guard and attack markers (shields and swords, up to eight each, right click removes); the world and the interface are copied opaque so glows keep their brightness

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/main.rs

@@ -1373,7 +1373,7 @@ async fn main() {
                     if inp.ldown.is_some() {
                         inp.ldown = None;
                     } else if app.game.hand.is_empty() && matches!(ui.tool, Tool::Order(_)) {
-                        app.game.queue(Act::CancelOrders);
+                        app.game.queue(Act::Unmark { x: wx, y: wy });
                     } else {
                         app.game.queue(Act::Drop { x: wx, y: wy });
                     }