NEON-29: Aim walk ledge probes at click when nav column descends

Column steering follows path tangents on the violet deck while the
authoritative goal sits on the lower floor; velocity-aligned support rays
kept hitting deck in the tangent direction and suppressed ledge gravity.
Use want_goal_h for probe offsets when vertical routing + column steer
+ on floor + goal surface below feet.

client/scripts/player.gd

@@ -944,10 +944,23 @@ func _physics_process(delta: float) -> void:
 	else:
 		_set_horizontal_velocity_toward(_auth_walk_goal, want_goal_h)
 
-	# Prefer actual horizontal velocity so probes match nav/path steering, not only click bearing.
+	# Prefer [param velocity] XZ so probes match [code]move_and_slide[/code] / path steering (NEON-16).
+	# Exception: with **column** path steering toward a **lower** click, velocity often hugs the baked
+	# path tangent on TerracePlatformB (violet) while [param want_goal_h] points at the floor — rays
+	# along velocity keep hitting deck ahead → false “support” and no ledge gravity until XZ closes
+	# (violet → gold → floor). Use click bearing for probes in that case only.
 	var walk_move_dir_xz := Vector2(velocity.x, velocity.z)
 	if walk_move_dir_xz.length_squared() < 1e-10:
 		walk_move_dir_xz = Vector2(want_goal_h.x, want_goal_h.z)
+	elif (
+		needs_vertical_routing
+		and _walk_nav_column_steering
+		and is_on_floor()
+		and _auth_walk_goal.y < feet_y - DESCEND_GOAL_Y_MARGIN
+	):
+		var wh2 := Vector2(want_goal_h.x, want_goal_h.z)
+		if wh2.length_squared() > 1e-10:
+			walk_move_dir_xz = wh2
 
 	_apply_walk_air_gravity(delta, walk_move_dir_xz)
 	floor_snap_length = _walk_floor_snap_length(feet_y, want_goal_h, walk_move_dir_xz)