导出step文件合并为整体，方便后续修改

src/core/side_action_designer.py

@@ -21,6 +21,7 @@
 from typing import Dict, List, Any, Optional, Tuple
 import math
 import numpy as np
+from OCC.Core.TopoDS import TopoDS_Shape, TopoDS_Face
 from utils.logger import get_logger
 
 logger = get_logger(__name__)
@@ -29,8 +30,8 @@ logger = get_logger(__name__)
 class UndercutDetector:
     """倒扣区域检测器"""
 
-    def detect_undercuts(self, shape: Any, parting_direction: List[float],
-                         parting_surface: Any = None) -> Dict[str, Any]:
+    def detect_undercuts(self, shape: TopoDS_Shape, parting_direction: List[float],
+                         parting_surface: Optional[TopoDS_Face] = None) -> Dict[str, Any]:
         """
         检测产品中的倒扣区域
 
@@ -443,8 +444,8 @@ class SideActionDesigner:
         self.slider_designer = SliderMechanismDesigner()
         self.lifter_designer = LifterMechanismDesigner()
 
-    def analyze_and_design(self, shape: Any, parting_direction: List[float],
-                           mold_size: Dict, parting_surface: Any = None) -> Dict[str, Any]:
+    def analyze_and_design(self, shape: TopoDS_Shape, parting_direction: List[float],
+                           mold_size: Dict, parting_surface: Optional[TopoDS_Face] = None) -> Dict[str, Any]:
         """
         综合分析倒扣并设计侧向分型机构