Engine upgrade + bug fixes + synergy reset

Miner Lou v0.42 is LIVE!

Major update with Unity 6 upgrade, critical bug fixes, and a new feature!

Bug Fixes:
✅ Fixed crash when Steam isn't running (game now works without Steam!)
✅ Fixed tutorial crash with controllers
✅ Fixed Leafeater HP synergy bug (HP bonuses now persist properly)

New Features:
⭐ Star Baby Synergy Reset Button - Respec anytime, all points refunded on use.
☁️ Steam Cloud Saves - Your progress syncs across devices

Changes
Use right click to move the camera now (previously was left click). This follows a more common pattern for strategy games!

Improvements:
- Upgraded to Unity 6 for better security & future-proofing
- All deprecated APIs updated
- Improved error handling & stability

Thanks for playing! Report bugs in #bug-reports