fix public navbar load when logged in

src/Agent/AutopilotMonitor.Agent/buildcounter.txt

@@ -1 +1 @@
-56
+57

src/Web/autopilot-monitor-web/components/PublicSiteNavbar.tsx

@@ -5,10 +5,15 @@ import { useAuth } from "../contexts/AuthContext";
 import { useTheme } from "../contexts/ThemeContext";
 
 export function PublicSiteNavbar({ showSectionLinks }: { showSectionLinks: boolean }) {
-  const { login } = useAuth();
+  const { login, isAuthenticated } = useAuth();
   const { theme, toggleTheme } = useTheme();
   const isDark = theme === "dark";
 
+  // Logged-in users should only see the main authenticated app navbar.
+  if (isAuthenticated) {
+    return null;
+  }
+
   return (
     <nav
       className={`sticky top-0 z-30 backdrop-blur-md border-b shadow-sm ${