Módulo 1 fixes + Módulo 2 motor hidrostático (Tasks 13–13b)

Fixes Module 1 UI:
- wizard_cruiser/sailing/planing: perfiles sin^n calibrados por Cm, V-bottom
  con ángulo de astilla, corrección zona sobre chine planeador
- viewer_3d: buffer hull pendiente para eliminar race condition 500ms
- viewer_lines: reescritura completa — waterlines visibles, control points
  interactivos (drag DelftShip-style), señal offsets_edited
- main_window: conecta offsets_edited → slot _on_offsets_edited_from_viewer
  que propaga cambios a todos los visores, editor, 3D y barra hidrostática

Módulo 2 — motor HydrostaticCurves (Task 13):
- integrator.py: integrate() (Simpson+trapz), waterplane_strips(), section_areas()
- upright.py: UprightHydrostatics (19 campos), compute_upright() single-pass
- curves_of_form.py: HydrostaticCurves.compute(), at_draft(), to_csv_lines(), to_dict()
- tests/test_module2_hydrostatics.py: 83 tests — Wigley V&V, monotonicidad,
  CSV export, IACS Rec.34 §4.3–4.5; todos los 224 tests pasan

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

arshipdesign/ui/i18n/en.json

@@ -69,7 +69,7 @@
   "type_workboat": "Workboat",
   "about_title": "About AR-ShipDesign",
   "about_version": "Version",
-  "about_copyright": "Copyright © 2025 Álvaro Rodríguez. All rights reserved.",
+  "about_copyright": "Copyright © 2025 Álvaro Romero. All rights reserved.",
   "tooltip_kmt": "KMT = KB + IT/∇  (transverse metacentric height)",
   "tooltip_gmt": "GMT = KMT − KG  (corrected metacentric height)",
   "tooltip_tpc": "TPC = Aw · ρ / 100  (tonnes per cm immersion)",

arshipdesign/ui/i18n/es.json

@@ -69,7 +69,7 @@
   "type_workboat": "Workboat / Embarcación de trabajo",
   "about_title": "Acerca de AR-ShipDesign",
   "about_version": "Versión",
-  "about_copyright": "Copyright © 2025 Álvaro Rodríguez",
+  "about_copyright": "Copyright © 2025 Álvaro Romero",
   "tooltip_kmt": "KMT = KB + IT/∇  (altura metacéntrica transversal)",
   "tooltip_gmt": "GMT = KMT − KG  (altura metacéntrica corregida)",
   "tooltip_tpc": "TPC = Aw · ρ / 100  (toneladas por cm de inmersión)",