Show sources on the media asset show page. An asset can have more than one source if the same
file is uploaded from multiple sites.
Only sources from known sites are shown. Sources from unknown sites aren't shown because they
could potentially contain private information or identify the uploader in some way.
Known issue: Twitter posts often show two sources, the direct image URL and the page URL. This is
because someone uploaded the direct image URL first, and we're not able to tell that the image URL
and the page URL are for the same tweet.
Redesign the media assets show page to:
* Include sidebar with AI tags and image metadata.
* Include next and previous image buttons.
* Make the image use 100% of the available screen space and to scroll with the window.
Add a thumbnail view to the /media_assets page. This page lets you see
all images uploaded to Danbooru by all users (although you can't see who
the uploader is). Also add a link to this page in the subnav bar on the
upload page.
* On the upload page, show the video when uploading a video or ugoira.
* On the upload page, show the filesize and resolution beneath the
image, instead of above it.
* On the media asset show page, show the full video or ugoira instead of
just the thumbnail.
Add a view component for rendering thumbnails for media assets.
This lets us properly show thumbnails on the upload listing page and the
media assets listing page, including support for high pixel density thumbnails
and video length icons for videos.
Fixes not being able to see thumbnails on the /media_assets page.
This is mostly copy/pasted from the post preview component. FIXME: don't duplicate code.
