feat(stability): Módulo 3 — Curva GZ + criterios IMO IS Code 2008
- gz_integrator.py: GZCurve, GZPoint, compute_gz_wall_sided (fórmula
pared lateral), compute_gz_direct (integración Sutherland-Hodgman)
- imo_is2008.py: IMOCriterion, IMOResult, check_imo_is2008 —
6 criterios A.2.1.1–A.2.1.6 del IS Code 2008 Cap.2
- gz_curve_widget.py: GZCurveWidget QPainter — curva cian, áreas
sombreadas, líneas IMO, marcador AVS, tabla PASS/FAIL integrada
- main_window.py: GZCurveWidget en MOD_STABILITY, _compute_and_show_gz,
_on_show_stability conectado al ribbon
- dark.qss: estilos GZCurveWidget
- test_module3_stability.py: 33 tests S-01..S-28 (315 total, todos pasan)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
alro65
0f85935fc8