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/HelpView.tsx

@@ -0,0 +1,92 @@
+'use client';
+
+import { useState } from 'react';
+import DoctorModal from './DoctorModal';
+import * as Icons from './Icons';
+import { en } from '@/lib/i18n/locales/en';
+import { LIGHTBOX_SHORTCUTS, shortcutDisplayKeys } from '@/lib/lightboxShortcuts';
+
+/**
+ * The admin help section.
+ *
+ * It exists because parts of the portfolio have no control of their own. The
+ * lightbox is the clearest case: its keys are deliberately unadvertised to
+ * visitors, which also left the site owner with no way to learn they exist
+ * (#473). This is where the owner finds out what their portfolio can do.
+ *
+ * Labels come from the English dictionary rather than being retyped, so what
+ * this page promises is what a visitor is actually shown. The admin panel is
+ * English-only, hence `en` directly.
+ */
+export default function HelpView() {
+  const [showDoctor, setShowDoctor] = useState(false);
+
+  return (
+    <div className="settings-panel">
+      <div className="settings-section-header">
+        <h3>
+          <Icons.IconFileText size={18} /> Help
+        </h3>
+        <p className="settings-section-sub">
+          What your portfolio can do that has no button of its own.
+        </p>
+      </div>
+
+      <div className="settings-group">
+        <div className="settings-group-head">
+          <span className="settings-group-title">
+            <Icons.IconFilm size={13} />
+            Image viewer
+          </span>
+          <span className="settings-group-desc">
+            Keys a visitor can press in the lightbox. There is deliberately no toolbar for these — a
+            permanent control over a photograph costs every visitor something — but visitors can
+            call up the same list with <kbd className="help-kbd">?</kbd> or{' '}
+            <kbd className="help-kbd">H</kbd>.
+          </span>
+        </div>
+
+        <dl className="help-shortcuts">
+          {LIGHTBOX_SHORTCUTS.map((shortcut) => (
+            <div key={shortcut.labelKey} className="help-shortcuts-row">
+              <dt className="help-shortcuts-keys">
+                {shortcutDisplayKeys(shortcut).map((key) => (
+                  <kbd key={key} className="help-kbd">
+                    {key}
+                  </kbd>
+                ))}
+              </dt>
+              <dd className="help-shortcuts-label">
+                {en.lightbox[shortcut.labelKey]}
+                {shortcut.note && <span className="help-shortcuts-note">{shortcut.note}</span>}
+              </dd>
+            </div>
+          ))}
+        </dl>
+      </div>
+
+      <div className="settings-group">
+        <div className="settings-group-head">
+          <span className="settings-group-title">
+            <Icons.IconShieldCheck size={13} />
+            Diagnostics
+          </span>
+          <span className="settings-group-desc">
+            Checks the things that fail silently — a wrong proxy hop count, a deleted album ID, a
+            plaintext password, an album Immich does not consider shared. It also sits behind the
+            status badge in the top bar, which is where it belongs when the question is whether
+            anything needs attention right now.
+          </span>
+        </div>
+
+        <div className="help-action">
+          <button type="button" className="admin-btn" onClick={() => setShowDoctor(true)}>
+            <Icons.IconShieldCheck size={14} /> Run diagnostics
+          </button>
+        </div>
+      </div>
+
+      <DoctorModal isOpen={showDoctor} onClose={() => setShowDoctor(false)} />
+    </div>
+  );
+}