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>

components/AlbumNav.tsx

@@ -0,0 +1,66 @@
+/**
+ * AlbumNav — the "← previous album / next album →" pair at the foot of an
+ * album detail page (#483).
+ *
+ * Renders nothing when there is no neighbour in either direction, so a lone
+ * album keeps its quiet ending.
+ */
+
+import Link from 'next/link';
+import { getServerDictionary } from '@/lib/i18n/server';
+import type { AlbumNavPair } from '@/lib/albumNav';
+
+function Chevron({ direction }: { direction: 'prev' | 'next' }) {
+  return (
+    <svg
+      aria-hidden="true"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      strokeWidth="2"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+    >
+      <polyline points={direction === 'prev' ? '15 18 9 12 15 6' : '9 18 15 12 9 6'} />
+    </svg>
+  );
+}
+
+export function AlbumNav({ prev, next }: AlbumNavPair) {
+  const t = getServerDictionary();
+  if (!prev && !next) return null;
+
+  return (
+    <nav className="album-nav" aria-label={t.common.albumNavAria}>
+      {prev ? (
+        <Link
+          href={prev.href}
+          className="album-nav__link album-nav__link--prev"
+          aria-label={t.common.prevAlbumAria(prev.name)}
+        >
+          <Chevron direction="prev" />
+          <span className="album-nav__text">
+            <span className="album-nav__kicker">{t.common.prevAlbum}</span>
+            <span className="album-nav__name">{prev.name}</span>
+          </span>
+        </Link>
+      ) : (
+        /* Holds the next link against the right edge when there is no previous. */
+        <span aria-hidden="true" />
+      )}
+      {next && (
+        <Link
+          href={next.href}
+          className="album-nav__link album-nav__link--next"
+          aria-label={t.common.nextAlbumAria(next.name)}
+        >
+          <span className="album-nav__text">
+            <span className="album-nav__kicker">{t.common.nextAlbum}</span>
+            <span className="album-nav__name">{next.name}</span>
+          </span>
+          <Chevron direction="next" />
+        </Link>
+      )}
+    </nav>
+  );
+}