🐛 Add lightbox dimensions calculation

Implement a method to calculate lightbox dimensions for media items
based on their metadata, ensuring proper display in the lightbox.

✨ 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.

💬 Update text for clarity and consistency

Revise descriptions and prompts to enhance user understanding and engagement.

💄 Update button text for clarity

Change "Fetch older photos" to "See earlier photos" for improved user understanding.

🔥 Remove pre-computed media stats from controller

Eliminate unnecessary media stats computation to enhance performance
and simplify the controller logic.

💄 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.

💄 Add preload option for PhotoSwipe lightbox

Enhance the PhotoSwipe lightbox configuration by adding a preload
option to improve performance when loading images.

💄 Update media thumbnail loading and styling

Refine thumbnail loading logic and enhance popup styles for better
visual consistency and user experience.