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>

.env.local.example

@@ -34,6 +34,11 @@ STALE_MAX_AGE=86400
 # refetch. Leave it unset in normal operation.
 # IMAGE_CACHE_VERSION=1
 
+# Client proofing links: POST a JSON notification here when a client submits
+# a selection (Discord, Slack, Gotify, n8n, ...). See
+# docs/gallery-config.md#client-proofing-links.
+# PROOFING_WEBHOOK_URL=https://discord.com/api/webhooks/...
+
 # CDN mode: serve photos and videos through a pull CDN (default: off).
 # Point a CDN (Cloudflare, Bunny, CloudFront, ...) at this server as its origin,
 # cache /api/image/* and /api/video/* including the query string, and put its