feat: 增强一级关系识别与保持关系策略

scripts/verify_edge_length_resize.py

@@ -168,7 +168,11 @@ def _assert_cube_edge_intent_geometry(
                     f"source_count={source_count}, slanted_count={slanted_count}, "
                     f"expected_slanted={expected_slanted:g}, lengths={_length_distribution_from_values(lengths)}"
                 )
-    elif strategy in {"move-edge-end-plane-by-push-pull", "scale-owning-shape-from-edge"}:
+    elif strategy in {
+        "move-edge-end-plane-by-push-pull",
+        "keep-first-level-planar-relations",
+        "scale-owning-shape-from-edge",
+    }:
         if target_count != 4 or source_count != 8:
             raise SystemExit(
                 f"{strategy} should resize the whole cube span in the selected Edge direction; "
@@ -195,6 +199,7 @@ def main() -> int:
             "auto",
             "local-edge-only-deform",
             "move-edge-end-plane-by-push-pull",
+            "keep-first-level-planar-relations",
             "scale-owning-shape-from-edge",
         ],
         help="Requested Edge length edit semantics.",
@@ -220,6 +225,8 @@ def main() -> int:
     expected_strategy = args.expect_strategy or args.strategy
     if expected_strategy == "auto":
         expected_strategy = strategy
+    if expected_strategy == "keep-first-level-planar-relations":
+        expected_strategy = "move-edge-end-plane-by-push-pull"
     if strategy != expected_strategy:
         raise SystemExit(f"expected {expected_strategy}, got {strategy or '<none>'}")
     if strategy == "move-edge-end-plane-by-push-pull" and plan.get("edge_length_planar_constraint_status") != "ready":
@@ -228,6 +235,11 @@ def main() -> int:
             f"status={plan.get('edge_length_planar_constraint_status')}, "
             f"blockers={plan.get('edge_length_planar_constraint_blockers')}"
         )
+    if args.strategy == "keep-first-level-planar-relations":
+        if plan.get("edge_length_planar_relation_constraint_requested") is not True:
+            raise SystemExit(f"keep-planar-relations plan should preserve explicit constraint intent: {plan}")
+        if "保持一级平面关系" not in str(plan.get("edge_length_strategy_label") or ""):
+            raise SystemExit(f"keep-planar-relations plan should use a clear user-facing label: {plan}")
 
     result = model.resize_general_edge_length(
         edge_id,