fix(jitsi): Use LAN IP instead of localhost for backends

- jitsi_web: 127.0.0.1:8443 → 192.168.255.1:8443
- jitsi_xmpp: 127.0.0.1:5280 → 192.168.255.1:5280

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

package/secubox/secubox-app-jitsi/files/usr/lib/secubox/haproxy.d/jitsi.cfg

@@ -12,10 +12,10 @@ backend jitsi_web
     # WebSocket support
     option http-server-close
     timeout tunnel 1h
-    server jitsi 127.0.0.1:8443 check ssl verify none
+    server jitsi 192.168.255.1:8443 check ssl verify none
 
 # XMPP BOSH/WebSocket backend (if needed separately)
 backend jitsi_xmpp
     mode http
     option httpchk GET /http-bind
-    server prosody 127.0.0.1:5280 check
+    server prosody 192.168.255.1:5280 check