Design a clean, intuitive UI/UX for a "Photo Organizer" app that allows users to easily sort, rename, and organize photos by date. The app should feature a welcoming home screen with options to "Organize Photos" or "View Organized Folders," plus a simple upload screen with drag-and-drop functionality and thumbnail previews. In the organization settings, users can choose how photos are sorted (e.g., by year and month) and set naming conventions. While organizing, a progress screen displays real-time status, and users can pause or cancel as needed. Once completed, users access a folder view organized by date, with a grid of photo thumbnails and a search bar. The design should be modern and minimalistic, with a calming color palette, large buttons for easy navigation, and dark mode for accessibility.