fix(v1.0.1): 修复 VDE-018 — ssi_boolean.cpp 命名空间回归

1. 删除不存在的 using vde::core::Transform3D/Plane3D
2. 移除两个过早关闭 vde::brep 命名空间的 } (原行431/946)
3. 移除匿名空间内重复的 extract_face_fragment/classify_point_adaptive 前向声明

GCC 10.2.1 -fsyntax-only 通过 (0 errors)

src/brep/ssi_boolean.cpp

@@ -29,8 +29,6 @@ using vde::core::Point2D;
 using vde::core::Point3D;
 using vde::core::Vector2D;
 using vde::core::Vector3D;
-using vde::core::Transform3D;
-using vde::core::Plane3D;
 using vde::brep::ClassResult;
 namespace vde::brep {
 
@@ -61,10 +59,6 @@ namespace {
 /// ClassResult is now defined in ssi_boolean.h (public API)
 // ═══════════════════════════════════════════════════════════
 //  Constants & types
-BrepModel extract_face_fragment(const BrepModel& body, int face_id);
-vde::brep::ClassResult classify_point_adaptive(
-    const BrepModel& body, const Point3D& p, int& num_exact_upgrades);
-
 // ═══════════════════════════════════════════════════════════
 //  Mesh caching (shared with brep_boolean.cpp pattern)
 // ═══════════════════════════════════════════════════════════
@@ -428,8 +422,6 @@ NonManifoldContactResult detect_non_manifold_contact(
 //  Face utilities (shared — used by both public and internal code)
 // ═══════════════════════════════════════════════════════════
 
-}  // anonymous namespace — shared face utilities follow
-
 /// Get bounding box of a face from its edges/vertices
 AABB3D face_bounds(const BrepModel& body, int face_id) {
     AABB3D bb;
@@ -943,8 +935,6 @@ vde::brep::ClassResult classify_point_adaptive(
 /// 5. If vote is inconclusive, sample 2N more points and re-vote
 /// 6. Boundary points (distance < tol) use exact_orient3d for robust determination
 
-}  // anonymous namespace — classify_face_fragment is public
-
 vde::brep::ClassResult classify_face_fragment(
     const BrepModel& body, const BrepModel& other_body,
     int face_id, int& num_exact_upgrades)