- Add interactive door system with click detection on door meshes
- Create custom DoorModal component replacing browser confirm()
- Implement door opening with texture change to door1_open.png
- Add additive door rendering to preserve opened doors
- Remove exploration button and requestExploration method
- Implement camera orbit controls with smooth animations
- Add active view indicator (yellow highlight) on camera buttons
- Add vertical zoom slider with label
- Fix camera to maintain isometric perspective while rotating
- Integrate all systems into main game loop
