Markers: a second click or tap removes them; right click with the flag tool takes the flag

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

src/main.rs

@@ -1410,7 +1410,7 @@ async fn main() {
                 if !inp.rdrag && !over_ui && app.game.state == 0 {
                     if inp.ldown.is_some() {
                         inp.ldown = None;
-                    } else if app.game.hand.is_empty() && matches!(ui.tool, Tool::Order(_)) {
+                    } else if app.game.hand.is_empty() && matches!(ui.tool, Tool::Order(_) | Tool::Flag) {
                         app.game.queue(Act::Unmark { x: wx, y: wy });
                     } else {
                         app.game.queue(Act::Drop { x: wx, y: wy });