fix: render window controls on unsupported targets

crates/layout/src/window_controls.rs

@@ -148,6 +148,12 @@ impl RenderOnce for WindowControls {
                 })
         };
 
+        #[cfg(not(any(target_os = "macos", target_os = "windows", target_os = "linux")))]
+        let controls = {
+            let _ = (id, window, cx);
+            div()
+        };
+
         controls
     }
 }
@@ -167,6 +173,10 @@ fn maximize_on_double_click() -> impl Fn(&ClickEvent, &mut Window, &mut App) + '
         {
             let _ = (event, window);
         }
+        #[cfg(not(any(target_os = "macos", target_os = "linux", target_os = "windows")))]
+        {
+            let _ = (event, window);
+        }
     }
 }