New in 0.1.2:
- Debug color overlay: tint cars by physics state (yellow=frozen,
cyan=fast-path, magenta=full-accuracy), individual toggles per state
- Exclude locomotives from Physics Optimizer and Auto Freeze
- Debug stats line in overlay showing live counts per state
- Resync quality 1/16 option added
Defaults tuned for new installs:
- Resync quality: 1/4 -> 1/8
- Speed threshold: ~0.7 mph -> 0.2 mph
- Overlay opacity: 100% -> 75%
Rename: Physics Overhaul -> Physics Optimizer throughout
