test: Java-Geometrie-Utility-Tests portiert (Tests 1–6) + Genus-2-TODO-Stub

Portiert aus CuttinUtilityTest, UnwrapUtilityTest, ConvergenceUtilityTests
und HomologyTest (Java-Quelldatei unifgeo/test). Jetzt 170 CGAL-Tests.

Neue Suiten in test_geometry_utils.cpp:
  CuttingUtility       — point_in_triangle_2d (3 Tests, Java-Test 1–2)
  UnwrapUtility        — Eckwinkel law-of-cosines (2 Tests, Java-Test 3)
  ConvergenceUtility   — circumradius + scale-invariant R_f/sqrt(A) (6 Tests, Java-Test 4–6)
  HomologyGenerators   — GTEST_SKIP-Stub für Genus-2 (Java-Test 7, Phase 8)

Der Stub dokumentiert genau was fehlt (Genus-2-Mesh), welcher Code nötig ist
(compute_cut_graph → 4 cut edges) und die Java-Herkunft.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

code/tests/cgal/CMakeLists.txt

@@ -43,6 +43,12 @@ add_executable(conformallab_cgal_tests
     # ── Phase 7: Java-parity layout — MobiusMap, priority BFS, halfedge_uv,
     #             period matrix, fundamental domain, tiling
     test_phase7.cpp
+
+    # ── Java-Parität: Geometrie-Utility-Tests ─────────────────────────────────
+    #    Portiert aus CuttinUtilityTest, UnwrapUtilityTest,
+    #    ConvergenceUtilityTests, HomologyTest (Tests 1–6).
+    #    Test 7 (Genus-2-Homologie) als GTEST_SKIP-Stub bis Phase 8.
+    test_geometry_utils.cpp
 )
 
 target_include_directories(conformallab_cgal_tests SYSTEM PRIVATE