fix

src/entities/tasks/executor.rs

@@ -180,7 +180,8 @@ pub fn task_executor_system(
                                 let chopper_pos = transform.translation.truncate(); // XY only
                                 let trunk_xy = Vec2::new(trunk_pos.x as f32, trunk_pos.y as f32);
                                 let mut fall_dir = (trunk_xy - chopper_pos).normalize_or_zero();
-                                // If dorf is standing on the trunk (distance ~0), fall direction is arbitrary
+                                // If dorf is standing on the trunk (distance ~0), normalize_or_zero returns ZERO.
+                                // Safe to use == here because normalize_or_zero produces exact zero components.
                                 if fall_dir == Vec2::ZERO {
                                     fall_dir = Vec2::new(1.0, 0.0); // default: fall east
                                 }