release: v0.19.0

Release v0.19.0. See the `## [0.19.0] — 2026-09-29` section of
[CHANGELOG.md](https://github.com/ralksta/immich-folio/blob/dev/CHANGELOG.md)
for the full list.

Highlights: client proofing links (#683), custom content pages (#738),
asset picker search (#740), concurrent-edit detection (#742), env-locked
settings (#739), an accessibility baseline (#741), three security fixes
with advisories (#737, #755, #759), and a pre-release quality pass
(#780–#797).

---------

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>
Co-authored-by: Ralf <rohlenbo79@gmail.com>
Co-authored-by: Paul Thies <110185070+ImScheinox@users.noreply.github.com>
Co-authored-by: lancetm714 <108419425+lancetm714@users.noreply.github.com>
Co-authored-by: Lance Martin <lancetaylor95@gmail.com>

app/api/proof/[token]/submit/route.ts

@@ -0,0 +1,44 @@
+/**
+ * POST /api/proof/:token/submit — lock the client's selection and notify the
+ * photographer.
+ *
+ * Idempotent: submitting twice answers 200 both times, and only the first call
+ * fires the webhook.
+ */
+
+import { NextRequest, NextResponse } from 'next/server';
+import { proofError, resolveProofAccess } from '@/lib/proofAccess';
+import { ProofError, submitSelection } from '@/lib/proofSessions';
+import { notifySubmitted } from '@/lib/proofWebhook';
+import { getConfig } from '@/lib/config';
+
+export const dynamic = 'force-dynamic';
+
+const SUBMIT_RPM = 10;
+
+export async function POST(
+  request: NextRequest,
+  { params }: { params: Promise<{ token: string }> },
+) {
+  const { token } = await params;
+  const access = await resolveProofAccess(request, token, 'proof-submit', SUBMIT_RPM);
+  if ('error' in access) return access.error;
+
+  try {
+    const { session, firstSubmit } = await submitSelection(token);
+    if (firstSubmit) {
+      // Not awaited: a slow or broken webhook must not hold up the client.
+      void notifySubmitted(session, access.albumName, getConfig().siteUrl);
+    }
+    return NextResponse.json(
+      { ok: true, submittedAt: session.submittedAt },
+      { headers: { 'Cache-Control': 'no-store' } },
+    );
+  } catch (err) {
+    if (err instanceof ProofError && err.code === 'empty') {
+      return proofError(400, 'Nothing selected');
+    }
+    if (err instanceof ProofError) return proofError(404, 'Not found');
+    throw err;
+  }
+}