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/selector_binding.py

@@ -14,6 +14,12 @@ def _score(expected: dict[str, Any], actual: dict[str, Any]) -> float | None:
             left, right = expected[key], actual.get(key)
             if not isinstance(right, (list, tuple)) or len(left) != len(right): return None
             delta = math.sqrt(sum((float(a) - float(b)) ** 2 for a, b in zip(left, right)))
+            if key == "normal":
+                # A source CAP_FACE identifies a geometric plane, not the OCC
+                # orientation of the resulting face.  The two kernels may
+                # report the same cap with inverse normals, especially for a
+                # start cap.  Keep axis direction orientation-sensitive.
+                delta = min(delta, math.sqrt(sum((float(a) + float(b)) ** 2 for a, b in zip(left, right))))
             scores.append(max(0.0, 1.0 - delta / 0.05))
     for key in ("radius_mm", "plane_offset_mm"):
         if key in expected:
@@ -75,7 +81,16 @@ def bind_candidate_selectors(cdsl: dict[str, Any]) -> tuple[dict[str, Any], list
             if not prefix["features"]: raise ValueError(f"{feature['id']}: selector has no executable prefix")
             report = rebuild_cdsl(prefix, Path(temporary) / f"prefix-{index}.step", strict=True)
             body_id = next((item.get("body_id") for item in reversed(report.get("feature_results") or []) if item.get("body_id")), None)
-            records = [item for item in report.get("topology_records") or [] if not body_id or item.get("body_id") == body_id or str(item.get("body_id") or "").startswith(f"{body_id}:")]
+            records = [
+                item for item in report.get("topology_records") or []
+                # Reference planes and axes are session context, not body
+                # topology. They must remain available while binding a mirror
+                # or extent selector against a body-bearing prefix.
+                if item.get("kind") in {"plane", "axis"}
+                or not body_id
+                or item.get("body_id") == body_id
+                or str(item.get("body_id") or "").startswith(f"{body_id}:")
+            ]
             resolved = []
             for placeholder in placeholders:
                 geometry = placeholder.get("geometry") or {}
@@ -85,14 +100,21 @@ def bind_candidate_selectors(cdsl: dict[str, Any]) -> tuple[dict[str, Any], list
                     owner = placeholder.get("owner_feature_id")
                     owner_matches = [record for record in same_kind if owner in (record.get("owner_feature_ids") or [record.get("feature_id")])]
                     pool = owner_matches or same_kind
-                    if not geometry and len(pool) != 1:
-                        raise ValueError(f"{feature['id']}: selector_ambiguous after prefix rebuild")
-                    scored = [(score, record) for record in pool if (score := _score(geometry, record.get("geometry") or {})) is not None and score >= 0.8]
-                    scored.sort(key=lambda value: (-value[0], str(value[1].get("record_id"))))
-                    if scored:
-                        if len(scored) > 1 and abs(scored[0][0] - scored[1][0]) <= 1e-9:
+                    if not geometry:
+                        # Context selectors (notably a generated mirror plane)
+                        # may have no geometric snapshot. Their owner-qualified
+                        # singleton identity is sufficient and must not be scored
+                        # as a zero-information geometric match.
+                        if len(pool) != 1:
                             raise ValueError(f"{feature['id']}: selector_ambiguous after prefix rebuild")
-                        candidates = [scored[0][1]]
+                        candidates = [pool[0]]
+                    else:
+                        scored = [(score, record) for record in pool if (score := _score(geometry, record.get("geometry") or {})) is not None and score >= 0.8]
+                        scored.sort(key=lambda value: (-value[0], str(value[1].get("record_id"))))
+                        if scored:
+                            if len(scored) > 1 and abs(scored[0][0] - scored[1][0]) <= 1e-9:
+                                raise ValueError(f"{feature['id']}: selector_ambiguous after prefix rebuild")
+                            candidates = [scored[0][1]]
                 if not candidates: raise ValueError(f"{feature['id']}: selector_not_found after prefix rebuild")
                 for record in candidates:
                     owners = record.get("owner_feature_ids") or [record.get("feature_id")]