- completely redesign UI with dark mode support and improved layout

- add new filter preset options: 'cool' and 'warm'
- implement randomize filters functionality
- add new random image loading capability
- improve slider controls with better visual feedback
- enhance comparison slider with clearer indicators
- replace `Notyf` notifications with custom toast system
- optimize mobile responsiveness with tailwind configuration
- improve accessibility of filter controls
- add filter descriptions as tooltips

Author: TobiasMue91