NS-23: horizontal nav steering so bump-top departure works

Path waypoints from the plateau often sit on the slope almost under the
player (same xz, lower y). 3D steer + y clamp gave almost no horizontal
velocity, so standing on top then clicking off looked stuck. Steer in xz
at MOVE_SPEED and let move_and_slide follow floor/slope; keep 3D only for
vertical climb when xz is aligned.

client/scripts/player.gd

@@ -40,13 +40,25 @@ func snap_to_server(world_pos: Vector3) -> void:
 
 
 func _steer_toward_world_point(point: Vector3) -> void:
-	var delta: Vector3 = point - global_position
+	var pos := global_position
-	if delta.length_squared() < 1e-8:
+	var delta_h: Vector3 = Vector3(point.x - pos.x, 0.0, point.z - pos.z)
-		velocity = Vector3.ZERO
+	# Full 3D toward a waypoint that is mostly *below* (same xz, on the slope) while standing on
+	# the plateau yields almost no horizontal speed, so you never reach the rim. Nav in xz + floor
+	# slide handles ramps and departure from bump tops.
+	if delta_h.length_squared() > 1e-8:
+		velocity = delta_h.normalized() * MOVE_SPEED
 		return
-	var desired: Vector3 = delta.normalized() * MOVE_SPEED
+	var dy: float = point.y - pos.y
-	desired.y = clampf(desired.y, -MAX_DESCENT_SPEED, MAX_CLIMB_SPEED)
+	if dy > 0.08:
-	velocity = desired
+		var delta: Vector3 = point - pos
+		if delta.length_squared() < 1e-8:
+			velocity = Vector3.ZERO
+			return
+		var desired: Vector3 = delta.normalized() * MOVE_SPEED
+		desired.y = clampf(desired.y, -MAX_DESCENT_SPEED, MAX_CLIMB_SPEED)
+		velocity = desired
+	else:
+		velocity = Vector3.ZERO
 
 
 func _physics_process(_delta: float) -> void: