release: v0.13.0 (#535)

Twenty-nine commits since v0.12.0. See CHANGELOG.md for the full list
and the upgrade notes.

Ten additions — the SEO package (site URL, robots.txt, sitemap.xml,
JSON-LD), slideshow mode, opt-in original downloads, copy-link,
previous/next album navigation, alt text from the Immich description,
per-album location precision, the update notice, a Help tab, and a
subpage cover grid separate from its photo grid. Two fixes: CJK album
slugs, and the lightbox control bar.

Photo of the Day (#476) was built on `dev` and reverted as not planned;
it never appears in a release.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

https://claude.ai/code/session_01DmsHVRL9yQvckUB1ZpVWre

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: ralksta <ralksta@users.noreply.github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Claude Opus 5 <noreply@anthropic.com>

app/admin/components/AdminDashboard.tsx

@@ -19,6 +19,7 @@ const TABS = [
   { label: 'Journal', href: '/admin/journal', match: /^\/admin\/journal/ },
   { label: 'Settings', href: '/admin/settings', match: /^\/admin\/settings/ },
   { label: 'Analytics', href: '/admin/analytics', match: /^\/admin\/analytics/ },
+  { label: 'Help', href: '/admin/help', match: /^\/admin\/help/ },
 ];
 
 export default function AdminDashboard({ onLogout, children }: Props) {
@@ -229,6 +230,28 @@ export default function AdminDashboard({ onLogout, children }: Props) {
                       <span className="status-label">In-Memory Cache</span>
                       <span className="status-val">{status?.cache?.size ?? 0} items</span>
                     </div>
+                    {/*
+                      Discreet on purpose: a row in the status list, not a
+                      banner. When the check is off or could not run, the row
+                      still names the running version and says nothing about
+                      updates (#496).
+                    */}
+                    <div className="status-item">
+                      <span className="status-label">Version</span>
+                      {status?.update?.updateAvailable ? (
+                        <a
+                          className="status-val update"
+                          href="https://github.com/ralksta/immich-folio/releases/latest"
+                          target="_blank"
+                          rel="noopener noreferrer"
+                          title={`Version ${status.update.latest} is available`}
+                        >
+                          {status.update.current} → {status.update.latest}
+                        </a>
+                      ) : (
+                        <span className="status-val">{status?.update?.current ?? '—'}</span>
+                      )}
+                    </div>
                   </div>
                   <div className="status-dropdown-footer">
                     <button