🐛 Add lightbox dimensions calculation

Implement a method to calculate lightbox dimensions for media items based on their metadata, ensuring proper display in the lightbox. :sparkles: Add delete functionality for media items Implement permission checks for media deletion and update UI to show delete options for authorized users. Add tests for deletable_by? method. :speech_balloon: Update text for clarity and consistency Revise descriptions and prompts to enhance user understanding and engagement. :lipstick: Update button text for clarity Change "Fetch older photos" to "See earlier photos" for improved user understanding. :fire: Remove pre-computed media stats from controller Eliminate unnecessary media stats computation to enhance performance and simplify the controller logic. :lipstick: Update media thumbnail variants and usage Refactor thumbnail handling in the Medium model and update views to use the new variant names for improved consistency and clarity. :lipstick: Add preload option for PhotoSwipe lightbox Enhance the PhotoSwipe lightbox configuration by adding a preload option to improve performance when loading images. :lipstick: Update media thumbnail loading and styling Refine thumbnail loading logic and enhance popup styles for better visual consistency and user experience.