✨ Enhance Privacy and Terms Pages

Add SEO metadata and improve structure for the privacy policy and terms of use pages. Introduce new tests for Generation and GenerationImage models, ensuring robust validation and associations. :sparkles: Introduce social sizes feature for generations Add functionality to display and download social media sizes for generated images. This includes new routes, controller actions, and views to enhance user experience and accessibility of social media formats. :sparkles: Add style deletion feature and update UI Implement the ability to delete specific style images and enhance the UI to provide feedback for first-time users. Update routes and tests to support this new functionality. :sparkles: Refactor shares and generations for improved functionality Update shares controller and views to use style identifiers instead of share tokens. Enhance generation image processing and add new style detail page. Improve UI elements and ensure better handling of image states. :sparkles: Introduce social size groups and download feature Add new social size groups for various platforms and implement download functionality for selected sizes in the shares controller. :sparkles: Enhance photo handling and background styling Improve photo selection logic and add dynamic background classes to enhance visual presentation in the photo grid.