feat: 接入 SCDM 优先编辑闭环并支持阵列局部间距

接入 SCDM probe/edit/cache/校验链路，增强孔组、阵列、关系式和参数表交互。

支持阵列相邻段间距、移动意图切换、结果回滚校验，并补充对应回归脚本。

step_editor/app.py

@@ -274,7 +274,23 @@ class StepEditorWindow(WindowCoreMixin, WindowStateMixin, WindowActionMixin, Inf
         self.scdm_feature_cache_state = "empty"
         self.scdm_feature_cache_message = ""
         self.scdm_feature_cache_path = ""
-        self.scdm_edit_runner_ready = {"face.offset", "hole.diameter", "hole.position", "slot.position", "boss.position"}
+        self.scdm_edit_runner_ready = {
+            "face.offset",
+            "hole.diameter",
+            "hole.position",
+            "feature.fill",
+            "slot.width",
+            "slot.depth",
+            "slot.position",
+            "boss.diameter",
+            "boss.height",
+            "boss.position",
+            "round.radius",
+            "chamfer.distance",
+            "feature.delete_round_or_chamfer",
+            "pattern.spacing",
+            "pattern.segment_spacing",
+        }
         self.load_in_progress = False
         self.load_thread: QThread | None = None
         self.load_worker: LoadWorker | None = None
@@ -1050,7 +1066,7 @@ class StepEditorWindow(WindowCoreMixin, WindowStateMixin, WindowActionMixin, Inf
 
         mode_box = QWidget()
         mode_box.setMinimumHeight(62)
-        help_tip(mode_box, "决定鼠标点模型时选中零件、Solid、Face、Edge，还是识别几何特征。")
+        help_tip(mode_box, "决定鼠标点模型时选中 Part、Solid、Face、Edge，还是用 Feature 模式把点到的 Face 解释成孔、槽、圆角等特征。")
         self.mode_section_title = QLabel("选择模式", mode_box)
         self.mode_section_title.setObjectName("modeSectionTitle")
         self.mode_section_title.setFixedSize(74, 20)
@@ -1085,7 +1101,7 @@ class StepEditorWindow(WindowCoreMixin, WindowStateMixin, WindowActionMixin, Inf
         self.mode_combo.setMaximumWidth(112)
         help_tip(
             self.mode_combo,
-            "选择模式决定鼠标点击模型时要选什么：零件、Solid、Face、Edge，或把 Face 解释成孔/槽/圆角等几何特征候选。",
+            "选择模式决定鼠标点击模型时要选什么：Part、Solid、Face、Edge，或用 Feature 模式把点到的 Face 解释成孔、槽、圆角等特征。",
         )
         self.mode_combo.currentIndexChanged.connect(lambda _index: self._on_mode_changed(self._current_selection_mode()))
         mode_pick_layout.addWidget(self.mouse_mode_label)