1aa753ba50
P0 — Boolean Robustness (Parasolid): - 7-class degenerate taxonomy: surface_overlap, curve_overlap, high_order, boundary_contact, vertex_contact, non_manifold_contact - Multi-point sampling: N=sqrt(area/tol²) points, >75% voting, exact_orient3d fallback on boundary cases - PrecisionTracker: accumulated loss, threshold warning P0 — Auto-Heal Pipeline (ACIS): - 5-step pipeline: Stitch→Simplify→Regularize→Orient→Check - AutoHealReport with per-step status, element counts, overall score P1 — Direct Modeling (ACIS): - fill_hole: edge loop → plane fit → NURBS insert - pull_up_to_face: push_pull to target face alignment Total: +~1500 lines across 6 files