feat(cadfs): 补齐核心建模能力并建立代表性回归

- 新增 loft、双向切除、through-all/up-to-next 等 CADFS lowering 与 engine 支持
- 支持多种 reference plane、B-spline profile 和 circular pattern replay
- 保留 transform 历史，并烘焙安全的单源平移/旋转变换
- 改进 selector 绑定、拓扑快照和 pattern 变换处理
- 建立 17 个代表样本的转换、重建与比较回归工具链
- 补充 schema、author guidance、运行时和几何回归测试

cadfs_to_cdsl/tests/test_parser.py

@@ -19,6 +19,14 @@ export const f = defineFeature(function(context, id, definition) {
 });
 '''
 
+TRANSFORM_SOURCE = SOURCE.replace(
+    '\n});\n',
+    '''
+  transform(context, id + "F2", {"entities":qCreatedBy(id + "F1", BODY), "transformType":TransformType.TRANSLATION_3D, "dx":10 * mm, "dy":0 * mm, "dz":0 * mm, "makeCopy":false});
+});
+''',
+)
+
 
 class ParserTests(unittest.TestCase):
     def test_lexer_ignores_comments_and_preserves_lines(self):
@@ -32,6 +40,12 @@ class ParserTests(unittest.TestCase):
         self.assertEqual(model.sketches[0].entities[0].operation, "skCircle")
         self.assertIsInstance(model.features[0].params["entities"], Call)
 
+    def test_transform_is_preserved_as_a_feature(self):
+        model = parse_featurescript(TRANSFORM_SOURCE, "transform")
+        self.assertEqual([step.feature_id for step in model.steps], ["F0", "F1", "F2"])
+        self.assertEqual(model.features[-1].operation, "transform")
+        self.assertEqual(model.features[-1].params["transformType"], "TransformType.TRANSLATION_3D")
+
     def test_query_parser(self):
         query = Call("makeQuery", [Call("__binary__", ["id", "+", "F1.opExtrude"]), "CAP_EDGE", "EDGE", {"isStart": False, "x": Call("sQuery", [Call("__binary__", ["id", "+", "F0.wireOp"]), "EDGE", "E0"])}])
         value = parse_query(query)