feat(art): add storybook meadow and woodland villagers

tests/jajce_world_scaffold_test.gd

@@ -89,6 +89,11 @@ func _run() -> void:
 		"Village center should include a few oversized ambient butterflies"
 	)
 	var grass_field := world.get_node("TerrainRoot/Terrain3D/CozyGrassField")
+	var grass_mesh := grass_field.get("mesh") as ArrayMesh
+	_check(
+		grass_mesh != null and grass_mesh.get_faces().size() == 105,
+		"Meadow grass must reuse the 35-triangle Blender tuft"
+	)
 	var grass_material := grass_field.get("mesh_material_override") as ShaderMaterial
 	var grass_process := grass_field.get("process_material") as ShaderMaterial
 	_check(
@@ -112,6 +117,10 @@ func _run() -> void:
 		"Grass placement should stay short enough to preserve villagers and paths"
 	)
 	var grass_controller := world.get_node("TerrainRoot/GrassInteractionController")
+	_check(
+		grass_material.get_shader_parameter("clearing_count") == 4,
+		"Grass must leave the four authored walking paths clear"
+	)
 	_check(
 		grass_controller.get("grass_material") == grass_material,
 		"Grass interaction should update the same material rendered by Terrain3D particles"