- ArtworkDownloadController: fix resolveDownloadUrl() to use correct CDN
path: original/{h1}/{h2}/{hash}.{file_ext} (was wrong originals/h1/h2/h3/orig.webp)
Wrap incrementDownloads() in try/catch so Redis failure can't break the response
- ArtworkPage: move ArtworkAuthor from left column to right sidebar
Sidebar now stacks: Author → Actions → Awards (sticky top-24)
Mobile block follows same order above main content
- ArtworkActions: replace four stacked text buttons with a compact 4-col icon grid
Like (heart, rose when active), Save (star, amber when active),
Share (network icon), Report (flag icon, red on hover)
Download remains full-width orange CTA
- ArtworkAuthor: add icons to Profile (person) and Follow buttons
Follow shows circle-check icon; Following state shows user-plus icon
