v1.3.197 Undefeatables nameplate fix:
- The previous setCustomNameVisible(true) change was insufficient because Dynamic Difficulty's LevelPlateHandler was overriding mob nameplate visibility client-side.
- Undefeatable mobs now bypass Dynamic Difficulty's shouldOverrideNameplateVisibility path.
- Undefeatables itself already marks its generated custom names visible, so vanilla persistent nameplate visibility can now take effect without crosshair targeting, including normal through-block rendering.
- Dynamic Difficulty levels/stats remain enabled.
- Random Undefeatable scale integration remains enabled.
