feat(artwork): sidebar layout, icon actions, original download URL fix

- 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

resources/js/components/artwork/ArtworkAuthor.jsx

@@ -66,16 +66,33 @@ export default function ArtworkAuthor({ artwork, presentSq }) {
       <div className="mt-4 grid grid-cols-2 gap-3">
         <a
           href={profileUrl}
-          className="inline-flex min-h-11 items-center justify-center rounded-lg border border-nova-600 px-3 py-2 text-sm text-white hover:bg-nova-800"
+          className="inline-flex min-h-11 items-center justify-center gap-2 rounded-lg border border-nova-600 px-3 py-2 text-sm text-white hover:bg-nova-800 transition"
         >
+          <svg className="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+            <path strokeLinecap="round" strokeLinejoin="round" d="M15.75 6a3.75 3.75 0 1 1-7.5 0 3.75 3.75 0 0 1 7.5 0ZM4.501 20.118a7.5 7.5 0 0 1 14.998 0A17.933 17.933 0 0 1 12 21.75c-2.676 0-5.216-.584-7.499-1.632Z" />
+          </svg>
           Profile
         </a>
         <button
           type="button"
-          className={`inline-flex min-h-11 items-center justify-center rounded-lg px-3 py-2 text-sm font-semibold transition ${following ? 'border border-nova-600 text-white hover:bg-nova-800' : 'bg-accent text-deep hover:brightness-110'}`}
+          className={`inline-flex min-h-11 items-center justify-center gap-2 rounded-lg px-3 py-2 text-sm font-semibold transition ${following ? 'border border-nova-600 text-white hover:bg-nova-800' : 'bg-accent text-deep hover:brightness-110'}`}
           onClick={onToggleFollow}
         >
-          {following ? 'Following' : 'Follow'}
+          {following ? (
+            <>
+              <svg className="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+                <path strokeLinecap="round" strokeLinejoin="round" d="M18 7.5v3m0 0v3m0-3h3m-3 0h-3m-2.25-4.125a3.375 3.375 0 1 1-6.75 0 3.375 3.375 0 0 1 6.75 0ZM3 19.235v-.11a6.375 6.375 0 0 1 12.75 0v.109A12.318 12.318 0 0 1 9.374 21c-2.331 0-4.512-.645-6.374-1.766Z" />
+              </svg>
+              Following
+            </>
+          ) : (
+            <>
+              <svg className="h-4 w-4 shrink-0" fill="none" viewBox="0 0 24 24" stroke="currentColor" strokeWidth={2}>
+                <path strokeLinecap="round" strokeLinejoin="round" d="M9 12.75 11.25 15 15 9.75M21 12a9 9 0 1 1-18 0 9 9 0 0 1 18 0Z" />
+              </svg>
+              Follow
+            </>
+          )}
         </button>
       </div>
     </section>