feat: add Authelia brand logo detection

Trigger keyword: authelia. Icon colour: #113155.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/brandIcons.js

@@ -2,7 +2,7 @@ import {
   siProxmox, siDocker,
   siSynology, siTruenas,
   siUbiquiti, siMikrotik, siCisco, siTplink, siAsus, siNetgear, siPfsense, siOpnsense, siOpenwrt,
-  siApache, siTraefikproxy,
+  siApache, siTraefikproxy, siAuthelia,
   siMariadb,
   siKubernetes,
   siDebian, siUbuntu,
@@ -36,9 +36,10 @@ const BRANDS = [
   { kw: ['opnsense'],                                     icon: siOpnsense },
   { kw: ['openwrt'],                                      icon: siOpenwrt },
 
-  // Serveurs web / proxy
+  // Serveurs web / proxy / auth
   { kw: ['apache', 'apache2', 'httpd'],                   icon: siApache },
   { kw: ['traefik'],                                      icon: siTraefikproxy },
+  { kw: ['authelia'],                                     icon: siAuthelia },
 
   // Bases de données
   { kw: ['mariadb', 'maria db'],                          icon: siMariadb },