AJ
703efd528a
Replace public mutable collection fields/properties with private backing fields and expose them as IReadOnlyList. Add proper methods for mutation (AddItem, AddItems, RemoveItem, SortItems). Changes: - Bin.Items: Now private with AddItem/AddItems/RemoveItem/SortItems - Result.ItemsNotUsed: Now readonly with Add methods - Result.Bins: Now readonly with Add methods - Updated all engine classes to use new encapsulated APIs This improves encapsulation and prevents external code from bypassing business logic by directly manipulating collections. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>