feat: 推进SCDM-first后端接入和大模型编辑优化

step_editor/ui_helpers.py

@@ -33,6 +33,18 @@ INFO_GROUPS: list[tuple[str, list[str]]] = [
             "feature_source_face_id",
         ],
     ),
+    (
+        "SCDM",
+        [
+            "scdm_backend_status",
+            "scdm_runtime_status",
+            "scdm_selection_status",
+            "scdm_selection_enabled_capabilities",
+            "scdm_selection_blocked_capabilities",
+            "scdm_selection_capability_count",
+            "scdm_selection_blocked_count",
+        ],
+    ),
     (
         "拓扑",
         [
@@ -529,6 +541,13 @@ INFO_LABELS = {
     "associated_feature_count": "关联特征数",
     "associated_feature_face_ids": "关联特征 Face",
     "feature_context_note": "关联探测",
+    "scdm_backend_status": "SCDM 后端",
+    "scdm_runtime_status": "SCDM 运行状态",
+    "scdm_selection_status": "SCDM 当前选择",
+    "scdm_selection_enabled_capabilities": "SCDM 可执行能力",
+    "scdm_selection_blocked_capabilities": "SCDM 未开放能力",
+    "scdm_selection_capability_count": "SCDM 能力数量",
+    "scdm_selection_blocked_count": "SCDM 未开放数量",
     "recognition_summary": "识别摘要",
     "recognition_candidate": "识别候选",
     "recognition_confidence": "识别置信度",
@@ -1178,6 +1197,39 @@ def _smooth_surface_polydata(polydata):
     return smoothed
 
 
+def _large_model_display_deflection(
+    requested: float,
+    *,
+    face_count: int = 0,
+    edge_count: int = 0,
+) -> float:
+    """Use a coarser display mesh for large STEP interaction only."""
+    value = max(float(requested), 1e-9)
+    if int(face_count or 0) > 1000 or int(edge_count or 0) > 2500:
+        return max(value, 1.2)
+    if int(face_count or 0) > 600 or int(edge_count or 0) > 1600:
+        return max(value, 0.6)
+    return value
+
+
+def _large_model_display_deflection_for_model(model: object, requested: float) -> float:
+    faces = getattr(model, "faces", ()) or ()
+    edges = getattr(model, "edges", ()) or ()
+    return _large_model_display_deflection(
+        requested,
+        face_count=len(faces),
+        edge_count=len(edges),
+    )
+
+
+def _large_model_display_deflection_for_stats(stats: object, requested: float) -> float:
+    return _large_model_display_deflection(
+        requested,
+        face_count=int(getattr(stats, "faces", 0) or 0),
+        edge_count=int(getattr(stats, "edges", 0) or 0),
+    )
+
+
 def _format_percent(value: object) -> str:
     if value is None or value == "":
         return ""