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/api/admin/status/route.ts

@@ -4,6 +4,7 @@ import { immich } from '@/lib/immich';
 import { getConfig } from '@/lib/config';
 import { cache } from '@/lib/cache';
 import { listBackups, readGalleryYaml, readSettingsYaml } from '@/lib/admin/yaml-service';
+import { getUpdateStatus } from '@/lib/updateCheck';
 
 export async function GET() {
   if (!isAdminEnabled()) {
@@ -68,6 +69,10 @@ export async function GET() {
 
   const config = getConfig();
 
+  // Answered from a day-long cache and never throws, so a blocked or offline
+  // instance still gets the rest of its status.
+  const update = await getUpdateStatus();
+
   return NextResponse.json({
     immich: {
       status: immichOk ? 'connected' : 'disconnected',
@@ -89,5 +94,6 @@ export async function GET() {
       count: backupCount,
       lastBackup,
     },
+    update,
   });
 }