Render access control gizmos for mode tools

[ZhuRuoLing]

Summary

• Expose chunk-scoped display and static access-control positions on the client.
• Render cuboid gizmos for managed blocks in the 3x3 chunk area centered on the player.
• Detect both main-hand and offhand mode tools, showing both modes when dual-wielded.

Testing

• .\gradlew.bat compileJava --console=plain