What's New
● NASA APOD Wallpapers: Added NASA's Astronomy Picture of the Day as a wallpaper source, complete with a dedicated info overlay.
● Custom Wallpapers: Added a custom wallpaper upload option for local images.
● Theme Contrast Options: Added contrast settings in the Drawer to adjust color distinction and improve overall accessibility.

Improvements & Fixes
● UI Polish: Redesigned the Wallpaper Info widget into a split button and removed the default "User" placeholder from the greeting.
● Performance: Refactored the architecture by splitting the Settings context to reduce unnecessary re-renders.
● Firefox Support: Updated the manifest and removed the redundant "Default New Tab" button for Firefox.