- main_window: Actually call hud.start_session() to reset stats and start timer
- hud_overlay: Add SetWindowPos refresh after WinAPI style changes
- This fixes stats not resetting and drag not working on Windows
- Detect when Entropia Universe window is in foreground
- Auto-hide HUD when game loses focus (optional, enabled by default)
- Add set_auto_hide_with_game() method to toggle behavior
- Uses Windows API: GetForegroundWindow, GetWindowText