Add NPC inventory management and UI enhancements

- Introduced new NPC inventory system allowing NPCs to hold and give items to players.
- Updated ContainerMinigame to support NPC mode, displaying NPC avatars and available items.
- Enhanced chat and conversation systems to sync NPC item states with Ink variables, improving narrative interactions.
- Added event listeners for item changes, ensuring dynamic updates during conversations.
- Implemented new methods in NPCGameBridge for item giving and inventory display, streamlining item interactions.

planning_notes/rails-engine-migration/progress/CLIENT_SERVER_SEPARATION_PLAN.md

@@ -1020,3 +1020,5 @@ Room Loading → Container System → Unlock System → Inventory System
 **Confidence:** High - architecture already supports this model (see ARCHITECTURE_COMPARISON.md)
 
 
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planning_notes/rails-engine-migration/progress/NPC_MIGRATION_OPTIONS.md

@@ -839,3 +839,5 @@ end
 This approach balances security, UX, and development effort.
 
 
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planning_notes/rails-engine-migration/progress/RAILS_ENGINE_MIGRATION_PLAN.md

@@ -1971,3 +1971,5 @@ This comprehensive plan provides:
 The architecture supports both standalone operation and mounting in host applications, making it flexible and maintainable.
 
 
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planning_notes/rails-engine-migration/progress/README.md

@@ -621,3 +621,5 @@ For questions about this migration plan, contact the development team or file an
 **Happy migrating! 🚀**
 
 
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