fix

src/entities/tasks/executor.rs

@@ -146,10 +146,25 @@ pub fn task_executor_system(
                                 continue;
                             }
                             if ambulatory.target.is_none() {
+                                // Find the actual ground level at the trunk's XY for pathfinding.
+                                // Walking to the trunk itself (z + 1.0) may land on an unreachable tile.
+                                // Instead, find a standable tile at the trunk's XY location.
+                                let ground_z = (0..=4i32)
+                                    .map(|z| {
+                                        IVec3::new(
+                                            trunk_pos.x,
+                                            trunk_pos.y,
+                                            z * crate::constants::ITILE_SIZE,
+                                        )
+                                    })
+                                    .find(|&pos| tilemap_mut.is_standable(pos))
+                                    .map(|pos| pos.z as f32 + 1.0)
+                                    .unwrap_or(trunk_pos.z as f32 + 1.0);
+
                                 ambulatory.target = Some(Vec3::new(
                                     trunk_pos.x as f32,
                                     trunk_pos.y as f32,
-                                    trunk_pos.z as f32 + 1.0,
+                                    ground_z,
                                 ));
                                 ambulatory.current_path = None;
                             }