fix: Actualizar con branding de GLM y restringir acceso con Supabase.

public/favicon.svg

@@ -1,13 +1,4 @@
-<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
-  <defs>
-    <linearGradient id="grad" x1="0%" y1="0%" x2="100%" y2="100%">
-      <stop offset="0%" stop-color="#3b82f6" />
-      <stop offset="100%" stop-color="#8b5cf6" />
-    </linearGradient>
-  </defs>
-  <rect width="100" height="100" rx="24" fill="url(#grad)" />
-  <rect x="25" y="25" width="20" height="20" rx="4" fill="#ffffff" />
-  <rect x="55" y="25" width="20" height="20" rx="4" fill="#ffffff" opacity="0.6" />
-  <rect x="25" y="55" width="20" height="20" rx="4" fill="#ffffff" opacity="0.6" />
-  <rect x="55" y="55" width="20" height="20" rx="4" fill="#ffffff" />
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512">
+  <rect width="512" height="512" fill="transparent"/>
+  <text x="256" y="310" text-anchor="middle" font-family="Arial, Helvetica, sans-serif" font-size="142" font-weight="700" fill="#6B8294">G<tspan fill="#61B72A">L</tspan>M</text>
 </svg>