fix(console): fix stuck authentication check and add reliable redirect to /console/login

- Add immediate redirection to /console/login when unauthenticated in AdminLayout
- Add timeout (4000ms) with AbortController in adminApi.ts to prevent infinite pending fetch
- Provide explicit sign-in link in layout fallback view

refer_landing_page/app/console/layout.tsx

@@ -13,14 +13,17 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
 
   useEffect(() => {
     let isMounted = true;
+
     async function checkAuth() {
+      if (pathname === "/console/login") {
+        if (isMounted) setIsAuthenticated(false);
+        return;
+      }
+
       const token = getClientToken();
       if (!token) {
-        if (pathname !== "/console/login") {
+        if (isMounted) setIsAuthenticated(false);
-          router.push("/console/login");
+        router.replace("/console/login");
-        } else {
-          setIsAuthenticated(false);
-        }
         return;
       }
 
@@ -29,11 +32,8 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
 
       if (!isValid) {
         removeClientToken();
-        if (pathname !== "/console/login") {
-          router.push("/console/login");
-        } else {
         setIsAuthenticated(false);
-        }
+        router.replace("/console/login");
       } else {
         setIsAuthenticated(true);
       }
@@ -51,8 +51,28 @@ export default function AdminLayout({ children }: { children: React.ReactNode })
 
   if (isAuthenticated === null) {
     return (
-      <div className="min-h-screen bg-ivory text-ink flex items-center justify-center">
+      <div className="min-h-screen bg-ivory text-ink flex flex-col items-center justify-center space-y-4">
         <div className="text-sm text-ink/70">Checking authentication...</div>
+        <Link
+          href="/console/login"
+          className="text-xs text-cobalt underline hover:text-cobalt/80 font-mono"
+        >
+          Click here to sign in
+        </Link>
+      </div>
+    );
+  }
+
+  if (isAuthenticated === false) {
+    return (
+      <div className="min-h-screen bg-ivory text-ink flex flex-col items-center justify-center space-y-4">
+        <div className="text-sm text-ink/70">Redirecting to login...</div>
+        <Link
+          href="/console/login"
+          className="px-4 py-2 bg-cobalt text-white rounded text-sm font-medium hover:bg-cobalt/90"
+        >
+          Go to Sign In Page
+        </Link>
       </div>
     );
   }

refer_landing_page/lib/adminApi.ts

@@ -153,9 +153,15 @@ async function request<T>(
 
   const baseUrl = getAdminApiBaseUrl();
   const url = `${baseUrl}${endpoint}`;
+  
+  const controller = new AbortController();
+  const timeoutId = setTimeout(() => controller.abort(), 4000);
+
+  try {
     const response = await fetch(url, {
       ...options,
       headers,
+      signal: controller.signal,
       cache: "no-store",
     });
 
@@ -170,6 +176,9 @@ async function request<T>(
     }
 
     return json.data;
+  } finally {
+    clearTimeout(timeoutId);
+  }
 }
 
 // 0. Auth Verification