feat(cadfs): expand selector provenance coverage

backend/engine/cdsl_engine/executors/dressup.py

@@ -17,6 +17,60 @@ if TYPE_CHECKING:  # pragma: no cover - import for type checkers only
     from ..session import ExecutionSession
 
 
+def _single_member_dressup_members(
+    node: FeaturePlanNode,
+    session: "ExecutionSession",
+    body: Any,
+    selected_edges: list[Any],
+) -> dict[str, Any] | None:
+    """Preserve unchanged body members after one exact-member dress-up.
+
+    The adapter only reports Compound history when every selected edge maps to
+    one source solid. Keep the same proof at the body-graph layer: all other
+    members must appear unchanged in the result and exactly one result solid
+    must remain for the changed member. Otherwise aggregate replay remains
+    valid, but no member-lifecycle transfer is asserted.
+    """
+    if not selected_edges or len(session.body_members) < 2:
+        return None
+    source_members: dict[str, Any] = {}
+    for member_id, member in session.body_members.items():
+        solids = session.adapter.body_solids(member)
+        if len(solids) != 1:
+            return None
+        source_members[member_id] = solids[0]
+    selected_members = {
+        member_id
+        for edge in selected_edges
+        for member_id, member in source_members.items()
+        if any(edge.is_same(candidate) for candidate in member.edges())
+    }
+    if len(selected_members) != 1:
+        return None
+    changed_member_id = next(iter(selected_members))
+    result_solids = session.adapter.body_solids(body)
+    unchanged: dict[str, Any] = {}
+    matched_result_indexes: set[int] = set()
+    for member_id, member in source_members.items():
+        if member_id == changed_member_id:
+            continue
+        matches = [
+            index for index, result in enumerate(result_solids)
+            if session.topology._same_topology_value(member, result)
+        ]
+        if len(matches) != 1 or matches[0] in matched_result_indexes:
+            return None
+        matched_result_indexes.add(matches[0])
+        unchanged[member_id] = result_solids[matches[0]]
+    changed = [
+        result for index, result in enumerate(result_solids)
+        if index not in matched_result_indexes
+    ]
+    if len(changed) != 1:
+        return None
+    return {**unchanged, node.feature_id: changed[0]}
+
+
 def _execute_fillet(node: FeaturePlanNode, session: "ExecutionSession") -> FeatureResult:
     # 圆角特征（fillet）执行入口：对选中边按半径做圆角，平滑尖角与棱边。
 
@@ -28,11 +82,15 @@ def _execute_fillet(node: FeaturePlanNode, session: "ExecutionSession") -> Featu
     if radius <= 0:
         raise ValueError("fillet radius_mm must be > 0")
     # 3. 解析目标边（支持 tangent_propagation 相切传播），并执行圆角。
+    edges = _selector_edges(node, session, tangent_propagation=bool(node.params.get("tangent_propagation")))
     body, topology_delta = session.adapter.fillet_with_topology_delta(
-        session.body, radius, _selector_edges(node, session, tangent_propagation=bool(node.params.get("tangent_propagation"))),
+        session.body, radius, edges,
     )
     # 4. 登记新主体并返回结果。
-    session.register_body(node.feature_id, body, replay_node=node, topology_delta=topology_delta)
+    session.register_body(
+        node.feature_id, body, replay_node=node, topology_delta=topology_delta,
+        body_members=_single_member_dressup_members(node, session, body, edges),
+    )
     return session.result(node)
 
 
@@ -86,7 +144,10 @@ def _execute_chamfer(node: FeaturePlanNode, session: "ExecutionSession") -> Feat
             detail={"distance_mm": distance, "surface_count": len(session.surface_members)},
         ))
     # 5. 登记新主体并返回结果。
-    session.register_body(node.feature_id, body, replay_node=node, topology_delta=topology_delta)
+    session.register_body(
+        node.feature_id, body, replay_node=node, topology_delta=topology_delta,
+        body_members=_single_member_dressup_members(node, session, body, edges),
+    )
     return session.result(node, diagnostics=diagnostics)