Introduce an 'external' attribute on the image-preview component to bypass the devrant image URL builder when the source is an external link. Update the component's observed attributes, rendering logic, and lightbox initialization to conditionally use the raw src URL. Modify rant-content to detect external images via the presence of links and pass the external flag accordingly.
The notification item component was incorrectly accessing `notif.username` directly instead of `notif.username.name`, causing undefined values to appear in the notification display when the username field contained an object with a `name` property. Added a console.info statement for debugging and corrected the property chain to properly extract the display name from nested object structures.
