diff --git a/kittyurl-frontend/src/context/AuthProvider.tsx b/kittyurl-frontend/src/context/AuthProvider.tsx
index f6b14c2..739b72c 100644
--- a/kittyurl-frontend/src/context/AuthProvider.tsx
+++ b/kittyurl-frontend/src/context/AuthProvider.tsx
@@ -2,98 +2,72 @@
 import Cookies from 'js-cookie';
 import { AuthContext } from './AuthContext';
 import { sha512 } from '../utils/crypto';
-import type { AuthResponse } from '../types/auth';
 
 const TOKEN_KEY = 'ktty_shared_token';
 
-/**
- * Konfiguracja ciasteczek dla SSO.
- * Na localhost ciasteczka domenowe nie działają, więc używamy undefined.
- * Na produkcji używamy '.ktty.is', co pozwala współdzielić sesję między subdomenami.
- */
 const getCookieConfig = () => {
     const hostname = window.location.hostname;
     const isLocal = hostname === 'localhost' || hostname === '127.0.0.1';
-
     return {
         domain: isLocal ? undefined : '.ktty.is',
-        secure: !isLocal, // Wymagane HTTPS na produkcji
+        secure: !isLocal,
         sameSite: 'Lax' as const,
-        expires: 7 // Token ważny przez 7 dni
+        path: '/',
+        expires: 7
     };
 };
 
-const getSubdomain = (): string | null => {
-    const hostname = window.location.hostname;
-    const parts = hostname.split('.');
-    if (parts.length <= 2) return null;
-    return parts[0];
-};
-
 export function AuthProvider({ children }: { children: ReactNode }) {
-    const config = getCookieConfig();
-    const subdomain = getSubdomain();
-
-    // Inicjalizacja stanu: sprawdzamy ciasteczko natychmiast przy ładowaniu strony.
-    // Dzięki temu SSO działa bez opóźnień.
     const [token, setToken] = useState<string | null>(() => Cookies.get(TOKEN_KEY) || null);
     const [loading, setLoading] = useState(false);
-    const [error, setError] = useState<string | null>(null);
+    const [error, setError] = useState<string | null>(null); // DODANE
 
-    const authRequest = useCallback(async (endpoint: 'signUp' | 'signIn', name: string, pass: string) => {
+    const authRequest = useCallback(async (endpoint: 'signIn' | 'signUp', name: string, pass: string) => {
         setLoading(true);
         setError(null);
 
         try {
             const hashedPassword = await sha512(pass);
-            // Vite Proxy przekaże to na https://www.ktty.is/api/...
-            const fullUrl = `/api/v1/user/${endpoint}`;
-
-            const response = await fetch(fullUrl, {
+            const response = await fetch(`/api/v1/user/${endpoint}`, {
                 method: 'POST',
-                headers: {
-                    'accept': 'application/json',
-                    'Content-Type': 'application/json',
-                    'X-Subdomain': subdomain || '',
-                },
-                body: JSON.stringify({ name, password: hashedPassword, ttl: 86400 }),
+                headers: { 'Content-Type': 'application/json' },
+                credentials: 'include',
+                body: JSON.stringify({ name, password: hashedPassword }),
             });
 
-            const data: AuthResponse = await response.json();
+            const data = await response.json();
 
             if (!response.ok) {
-                throw new Error(data?.error || data?.message || 'Błąd autoryzacji');
+                throw new Error(data?.message || 'Błąd autoryzacji');
             }
 
             if (data?.token) {
-                // Zapisujemy token z flagą domain: '.ktty.is'
-                Cookies.set(TOKEN_KEY, data.token, config);
+                Cookies.set(TOKEN_KEY, data.token, getCookieConfig());
                 setToken(data.token);
             }
             return data;
         } catch (err: unknown) {
-            const msg = err instanceof Error ? err.message : 'Wystąpił nieoczekiwany błąd';
+            const msg = err instanceof Error ? err.message : 'Wystąpił błąd';
             setError(msg);
             return null;
         } finally {
             setLoading(false);
         }
-    }, [subdomain, config]);
+    }, []);
 
     const logout = useCallback(() => {
-        // Usuwamy ciasteczko z tej samej domeny, na której zostało zapisane
-        Cookies.remove(TOKEN_KEY, { domain: config.domain });
+        Cookies.remove(TOKEN_KEY, { domain: getCookieConfig().domain, path: '/' });
         setToken(null);
-    }, [config]);
+    }, []);
 
     return (
         <AuthContext.Provider value={{
             isAuthenticated: !!token,
             token,
             loading,
-            error,
+            error, // TERAZ OBECNE
             signIn: (n, p) => authRequest('signIn', n, p),
-            signUp: (n, p) => authRequest('signUp', n, p),
+            signUp: (n, p) => authRequest('signUp', n, p), // TERAZ OBECNE
             logout
         }}>
             {children}
diff --git a/kittyurl-frontend/vite.config.ts b/kittyurl-frontend/vite.config.ts
index fbc457e..1aa6e31 100644
--- a/kittyurl-frontend/vite.config.ts
+++ b/kittyurl-frontend/vite.config.ts
@@ -14,26 +14,41 @@ export default defineConfig(({ mode }) => {
     const backendTarget = env.VITE_API_TARGET;
 
     return {
-        envDir: envDirectory,        
+        envDir: envDirectory,
         plugins: [
             react() as PluginOption,
             tailwindcss() as PluginOption,
         ],
         server: {
             port: 6568,
-            host: true,
+            host: true, // Pozwala na dostęp przez IP w sieci lokalnej
+            // Jeśli testujesz subdomeny lokalnie (np. app.local.ktty.is), dodaj to:
+            allowedHosts: [
+                '.ktty.is',
+                'localhost',
+                '127.0.0.1',
+
+            ],
+            // vite.config.ts
             proxy: {
                 '/api': {
                     target: backendTarget,
                     changeOrigin: true,
                     secure: false,
-                   
+                    cookieDomainRewrite: {
+                        "*": ""
+                    },                    
                 },
             },
         },
         preview: {
-            port: 6568,            
+            port: 6568,
             allowedHosts: true,
         },
+        resolve: {
+            alias: {
+                '@': path.resolve(__dirname, './src'),
+            },
+        },
     }
 })
\ No newline at end of file