[Feature] Add Dark Mode Support

[mazzyy]

Description Request to add a dark mode feature to the application to improve usability during nighttime or in low-light environments.

Steps to Reproduce (for reference) Open the app. Navigate to the settings menu. Look for the appearance/theme options (currently unavailable). Expected Behavior Users should be able to toggle between light and dark modes. The app should provide a seamless experience in both modes.

Additional Context Dark mode has become a standard feature in many apps and operating systems. It would be beneficial for users who prefer or require a darker interface.

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