Enhance authentication flow by implementing ProtectedRoute component across various pages, ensuring users are redirected based on their authentication status. Update login page to support Google sign-in and handle redirect URLs after login. Modify analytics and links pages to include loading indicators and protected access. Update next.config.ts to enable middleware for edge functions.

app/login/page.tsx

@@ -21,19 +21,35 @@ function MessageHandler({ setMessage }: { setMessage: (message: { type: string,
 
 export default function LoginPage() {
   const router = useRouter();
-  const { signIn, user } = useAuth();
+  const searchParams = useSearchParams();
+  const { signIn, signInWithGoogle, user } = useAuth();
   
   const [email, setEmail] = useState('');
   const [password, setPassword] = useState('');
   const [isLoading, setIsLoading] = useState(false);
   const [message, setMessage] = useState({ type: '', content: '' });
+  const [redirectUrl, setRedirectUrl] = useState<string | null>(null);
   
-  // 如果用户已登录，重定向到首页
+  // 获取重定向URL
+  useEffect(() => {
+    if (searchParams) {
+      const redirect = searchParams.get('redirect');
+      if (redirect) {
+        setRedirectUrl(decodeURIComponent(redirect));
+      }
+    }
+  }, [searchParams]);
+  
+  // 如果用户已登录，重定向到原始页面或首页
   useEffect(() => {
     if (user) {
-      router.push('/');
+      if (redirectUrl) {
+        router.push(redirectUrl);
+      } else {
+        router.push('/');
+      }
     }
-  }, [user, router]);
+  }, [user, router, redirectUrl]);
   
   const handleEmailSignIn = async (e: React.FormEvent) => {
     e.preventDefault();
@@ -53,7 +69,7 @@ export default function LoginPage() {
       const { error } = await signIn(email, password);
       
       if (error) {
-        throw new Error(error.message);
+        throw new Error(error instanceof Error ? error.message : 'Unknown error');
       }
       
       // 登录成功后，会通过 useEffect 重定向
@@ -67,6 +83,28 @@ export default function LoginPage() {
     }
   };
   
+  const handleGoogleSignIn = async () => {
+    try {
+      setIsLoading(true);
+      setMessage({ type: '', content: '' });
+      
+      const { error } = await signInWithGoogle();
+      
+      if (error) {
+        throw new Error(error instanceof Error ? error.message : 'Unknown error');
+      }
+      
+      // Google OAuth will redirect the user
+    } catch (error) {
+      console.error('Google login error:', error);
+      setMessage({ 
+        type: 'error', 
+        content: error instanceof Error ? error.message : 'Failed to sign in with Google' 
+      });
+      setIsLoading(false);
+    }
+  };
+  
   return (
     <div className="flex items-center justify-center min-h-screen bg-gray-100">
       {/* Wrap the component using useSearchParams in Suspense */}
@@ -149,6 +187,33 @@ export default function LoginPage() {
           </div>
         </form>
         
+        <div className="mt-6">
+          <div className="relative">
+            <div className="absolute inset-0 flex items-center">
+              <div className="w-full border-t border-gray-300"></div>
+            </div>
+            <div className="relative flex justify-center text-sm">
+              <span className="px-2 bg-white text-gray-500">Or continue with</span>
+            </div>
+          </div>
+          
+          <div className="mt-6">
+            <button
+              onClick={handleGoogleSignIn}
+              disabled={isLoading}
+              className="w-full flex items-center justify-center gap-3 py-2 px-4 border border-gray-300 rounded-md shadow-sm text-sm font-medium text-gray-700 bg-white hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500"
+            >
+              <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" width="18" height="18">
+                <path fill="#4285F4" d="M22.56 12.25c0-.78-.07-1.53-.2-2.25H12v4.26h5.92c-.26 1.37-1.04 2.53-2.21 3.31v2.77h3.57c2.08-1.92 3.28-4.74 3.28-8.09z"/>
+                <path fill="#34A853" d="M12 23c2.97 0 5.46-.98 7.28-2.66l-3.57-2.77c-.98.66-2.23 1.06-3.71 1.06-2.86 0-5.29-1.93-6.16-4.53H2.18v2.84C3.99 20.53 7.7 23 12 23z"/>
+                <path fill="#FBBC05" d="M5.84 14.09c-.22-.66-.35-1.36-.35-2.09s.13-1.43.35-2.09V7.07H2.18C1.43 8.55 1 10.22 1 12s.43 3.45 1.18 4.93l2.85-2.22.81-.62z"/>
+                <path fill="#EA4335" d="M12 5.38c1.62 0 3.06.56 4.21 1.64l3.15-3.15C17.45 2.09 14.97 1 12 1 7.7 1 3.99 3.47 2.18 7.07l3.66 2.84c.87-2.6 3.3-4.53 6.16-4.53z"/>
+              </svg>
+              Sign in with Google
+            </button>
+          </div>
+        </div>
+        
         <p className="text-sm mt-6 text-gray-600">
           Don&apos;t have an account?{' '}
           <Link href="/register" className="font-medium text-blue-600 hover:text-blue-500">