Add card packs that can be opened via right-click Use menu to receive
random cards based on weighted slot configurations. Packs support
customizable rarity-based or card-specific drop rates.
Key features:
- CardPack/PackSlot data classes with weighted random selection
- PackParser for user-defined pack configurations
- PackUsageBehavior extending game's UsageBehavior system
- Runtime data lookup to handle Unity serialization limitations
- Pack consumption after opening with stack support
- Auto-generated default packs per card set
Technical notes:
- UsageUtilities registration for context menu integration
- All non-serializable fields (Dictionary, List<PackSlot>) looked up
at runtime from ModBehaviour to survive Unity instantiation
- F9 debug spawn now uses InstantiateSync for proper item copies
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <[email protected]>
