fix: resolve all compilation errors — 0 build errors

Fixes:
- src/CMakeLists.txt: add tolerant_modeling.cpp to vde_brep (was missing)
- tests/core/test_cam_5axis.cpp: fix curves namespace, replace curves::NurbsSurface → NurbsSurface
- tests/brep/test_constraint_solver_3d.cpp: add brep_drawing.h include,
  replace core:: prefixes (core::Point3D→Point3D etc)
- src/CMakeLists.txt: revert vde_capi SHARED→STATIC (fix PIC relocation error)

Build: Docker vde-builder, 4 CPUs, 8GB, GCC 11.4 — 0 errors
Test: benchmarks timeout in container (expected), core tests pass

tests/brep/test_constraint_solver_3d.cpp

@@ -1,6 +1,7 @@
 #include <gtest/gtest.h>
 #include "vde/brep/constraint_solver.h"
 #include "vde/brep/drawing_standards.h"
+#include "vde/brep/brep_drawing.h"
 #include "vde/brep/modeling.h"
 #include "vde/core/transform.h"
 #include "vde/core/aabb.h"
@@ -974,8 +975,8 @@ TEST(KinematicChainTest, InverseKinematicsReachable) {
     };
 
     // Target at (0, 2) — reachable by 2 links of length 1
-    core::Transform3D target = core::Transform3D::Identity();
-    target.translation() = core::Vector3D(0.0, 2.0, 0.0);
+    Transform3D target = Transform3D::Identity();
+    target.translation() = Vector3D(0.0, 2.0, 0.0);
 
     auto angles = solver.inverse_kinematics(assy, links, target);
     EXPECT_EQ(angles.size(), 2u); // Should produce 2 angles
@@ -991,8 +992,8 @@ TEST(KinematicChainTest, InverseKinematicsUnreachable) {
     };
 
     // Target at (0, 3) — unreachable (max reach = 2)
-    core::Transform3D target = core::Transform3D::Identity();
-    target.translation() = core::Vector3D(0.0, 3.0, 0.0);
+    Transform3D target = Transform3D::Identity();
+    target.translation() = Vector3D(0.0, 3.0, 0.0);
 
     auto angles = solver.inverse_kinematics(assy, links, target);
     EXPECT_TRUE(angles.empty()); // Unreachable
@@ -1006,10 +1007,10 @@ TEST(KinematicChainTest, IsReachableCheck) {
         {1, 0.5, 0.0, 0.0, "l2"}
     };
 
-    core::Point3D near(1.0, 0.0, 0.0);
+    Point3D near(1.0, 0.0, 0.0);
     EXPECT_TRUE(solver.is_reachable(links, near));
 
-    core::Point3D far(10.0, 0.0, 0.0);
+    Point3D far(10.0, 0.0, 0.0);
     EXPECT_FALSE(solver.is_reachable(links, far));
 }
 
@@ -1018,7 +1019,7 @@ TEST(KinematicChainTest, DHTransformIdentity) {
     auto T = KinematicChainSolver::dh_transform(0.0, 0.0, 0.0, 0.0);
     // Not fully identity because DH includes rotation
     // At theta=0, should be I + translation on a=0
-    core::Transform3D I = core::Transform3D::Identity();
+    Transform3D I = Transform3D::Identity();
     EXPECT_TRUE(T.isApprox(I, 1e-6));
 }