Add /category route to find Wikipedia articles without images in a
category using the MediaWiki API. Filter out non-content images (UI
icons, logos) when checking articles.
Show image license on message page with alternate message for non-free
CC licenses (NC/ND) explaining Wikipedia's restrictions. For photos
with free licenses, show upload options linking to UploadWizard instead
of a message form.
Add Flickr CC 4.0 license codes, user profile links, previous message
detection from sent mail index, and back-navigation between category,
search results, and message pages.
Closes#3
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
