feat: bump client-services (accumulated feature work + deploy fixes)

Snapshot of in-progress work across local_backend, manager_dashboard,
and waiter_pwa (pricing, chat, fiscal, prep zones, recovery codes, CRM,
inventory, permissions), plus the nginx/docker-compose deploy fixes for
the Unraid + NPM reverse-proxy setup.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

.env.example

@@ -9,6 +9,10 @@ CLOUD_URL=https://xenia-admin.bonamin.gr
 SECRET_KEY=generate-with-openssl-rand-hex-32
 LICENSE_GRACE_HOURS=24
 
+# Break-glass support account (leave blank to disable)
+MASTER_USERNAME=
+MASTER_PASSWORD=
+
 # Volumes — absolute paths on the client machine
 DATA_PATH=/opt/xenia/data
 LOGO_PATH=/opt/xenia/logo.png