feat(v8): ultimate performance + CAM full optimization + visualization/IGA/quality
v8.1 — 极致性能 (SIMD + LockFree + Transaction + NUMA):
- simd_vector.h: Vec4d/Vec4f SSE/AVX/NEON auto-detect, batch AABB, SoA transpose
- concurrent_data: LockFreeQueue (MPMC CAS), LockFreeStack (Treiber), ConcurrentHashMap (64-segment sharded)
- transaction: Command pattern, UndoManager (infinite undo/redo), crash-recovery journal
- performance_tuning: NUMA-aware, cache_line aligned, prefetch, hot/cold separation
- 20 tests (concurrent + transaction), ~2600 lines
v8.2 — CAM 全面优化 + 装配模式:
- cam_optimization: chip_thinning, HSM, constant_engagement, trochoidal_turn_milling
- tool_life_management, probing_cycle, thread_milling
- cam_advanced enhanced: Mazak/Okuma/Haas/DMG post-processors (8 total)
- assembly_patterns: Circular/Rectangular/Mirror/PatternDriven/fill arrays
- assembly_feature enhanced: assembly-level PMI propagation, batch interference check
- 28 tests, compiled 0 errors (~2800 lines)
v8.3 — 可视化+压缩+IGA+质量闭环:
- visualization_quality: ambient_occlusion, edge_highlighting, wireframe, normals
- topology_compression: Brep compression, Edgebreaker, vertex quantization
- iga_prep: knot_insertion, degree_elevation, Bezier extraction for IGA analysis
- quality_feedback: design_rule_check, manufacturability, cost_estimation, quality_score (0-100)
- 28 tests, ~2349 lines
27 files, ~7750 lines, 76 tests
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