refactor: remove redundant client-side AuthGuard

The authentication is already properly handled by Next.js middleware
in middleware.ts with LOGIN_REQUIRED_PAGES. The middleware approach is
superior as it:
- Provides server-side protection before page loads
- Prevents flash of unauthorized content
- Centralizes auth logic in one place
- Better performance (no client-side JS needed)

Keep the API hooks conditional to prevent 401 errors before token is ready.

www/app/(app)/AuthGuard.tsx

@@ -1,70 +0,0 @@
-"use client";
-
-import { useEffect } from "react";
-import { useRouter, usePathname } from "next/navigation";
-import { signIn } from "next-auth/react";
-import useSessionStatus from "../lib/useSessionStatus";
-import { Flex, Spinner } from "@chakra-ui/react";
-
-interface AuthGuardProps {
-  children: React.ReactNode;
-  requireAuth?: boolean;
-}
-
-// Routes that should be accessible without authentication
-const PUBLIC_ROUTES = ["/transcripts/new"];
-
-export default function AuthGuard({
-  children,
-  requireAuth = true,
-}: AuthGuardProps) {
-  const { isAuthenticated, isLoading, status } = useSessionStatus();
-  const router = useRouter();
-  const pathname = usePathname();
-
-  // Check if current route is public
-  const isPublicRoute = PUBLIC_ROUTES.some((route) =>
-    pathname.startsWith(route),
-  );
-
-  useEffect(() => {
-    // Don't require auth for public routes
-    if (isPublicRoute) return;
-
-    // Only redirect if we're sure the user is not authenticated and auth is required
-    if (!isLoading && requireAuth && status === "unauthenticated") {
-      // Instead of redirecting to /login, trigger NextAuth signIn
-      signIn("authentik");
-    }
-  }, [isLoading, requireAuth, status, isPublicRoute]);
-
-  // For public routes, always show content
-  if (isPublicRoute) {
-    return <>{children}</>;
-  }
-
-  // Show loading spinner while checking authentication
-  if (
-    isLoading ||
-    (requireAuth && !isAuthenticated && status !== "unauthenticated")
-  ) {
-    return (
-      <Flex
-        flexDir="column"
-        alignItems="center"
-        justifyContent="center"
-        h="100%"
-      >
-        <Spinner size="xl" />
-      </Flex>
-    );
-  }
-
-  // If authentication is not required or user is authenticated, show content
-  if (!requireAuth || isAuthenticated) {
-    return <>{children}</>;
-  }
-
-  // Don't render anything while redirecting
-  return null;
-}

www/app/(app)/layout.tsx

@@ -6,7 +6,6 @@ import About from "../(aboutAndPrivacy)/about";
 import Privacy from "../(aboutAndPrivacy)/privacy";
 import UserInfo from "../(auth)/userInfo";
 import { RECORD_A_MEETING_URL } from "../lib/constants";
-import AuthGuard from "./AuthGuard";
 
 export default async function AppLayout({
   children,
@@ -91,7 +90,7 @@ export default async function AppLayout({
         </div>
       </Flex>
 
-      <AuthGuard requireAuth={requireLogin}>{children}</AuthGuard>
+      {children}
     </Container>
   );
 }