Small fixes

Summary of Fixes

1. Window positioning and scaling
   Updated _restore_window_geometry() to:
   Validate saved window positions against all monitors
   Center on the primary monitor if the saved position is off-screen
   Ensure window size doesn't exceed screen dimensions
   Handle multi-monitor setups
   Removed redundant centering command from setup_window() since geometry restoration handles it
2. Overlay cleanup on close
   Updated _on_window_close() to:
   Check if overlay is active when the user clicks X
   If active, call quit_app() to destroy the overlay, stop the tray, and clean up
   If not active, hide to tray as before
   Results:
   The window opens centered on the primary monitor, even if the saved position is off-screen
   Window size is constrained to fit the screen
   Closing with X while overlay is active properly quits and cleans up the overlay
   The application should now work correctly on laptops and other screen sizes, and the overlay cleanup issue is resolved.

Closing to tray

Changes Made:
Modified minimize behavior (_on_window_minimize): The window minimizes normally by default. It only hides to the tray if "Minimize to tray" is enabled in settings.
Added new setting minimize_to_tray: Default is False so existing users aren't affected.
Added migration: Existing users will have minimize_to_tray default to False.
Updated Settings dialog: Added a checkbox in Settings > Startup Options labeled "Minimize to tray when minimized". Enabling it restores the previous hide-to-tray behavior.
The application now minimizes normally by default. Enable the option in Settings > Startup Options if you want it to hide to the tray on minimize. Closing the window (X) still hides to the tray regardless of this setting.

EaseView v2.3

Changes in v2.3

• Added colour density control
• Improved keyboard navigation and accessibility
• Persistent settings with version migration
• System tray behaviour improvements
• General UI refinements and stability fixes