Hotfix ver 1.0.6

Summary: Steam Cloud sync was crashing during startup because it ran too early — before the main menu even appeared. The fix moves it to run only when the player actually opens their saves, keeping startup free of Steam Remote Storage calls. New players never trigger it at all.

Changes:

1. Steam Cloud sync now runs only when you open your saves, not during startup
2. New players with no saves never touch it
3. Steam initialization is unified and cleaned up to prevent crashes on shutdown
4. Startup loading now has detailed progress tracking so future issues can be found immediately