fix: resolve OIDC session state issue and synchronize portal sessions

Details:
- Backend: Extract Kratos session cookies and propagate via SetCookies in AuthInfo.
- Backend: Include sessionJwt and token during OIDC flows in PasswordLogin.
- UserFront: Add _silentSessionRecovery in main.dart to recover session via cookies if localStorage token is missing.
- UserFront: Update AuthProxyService, AuthTokenStore, AuthNotifier to support silent recovery and immediate local state update before redirect.
- AdminFront/DevFront: Fix OIDC authority to point directly to Gateway proxy and add recovery/error UI components.

devfront/src/features/auth/AuthGuard.tsx

@@ -9,7 +9,20 @@ export default function AuthGuard() {
   }
 
   if (auth.error) {
-    return <div>Auth Error: {auth.error.message}</div>;
+    return (
+      <div className="flex min-h-screen flex-col items-center justify-center p-4 text-center">
+        <div className="mb-4 text-red-500">
+          <h2 className="text-xl font-bold">Authentication Error</h2>
+          <p>{auth.error.message}</p>
+        </div>
+        <button
+          onClick={() => void auth.signinRedirect()}
+          className="rounded bg-blue-500 px-4 py-2 text-white hover:bg-blue-600"
+        >
+          Start Login Again
+        </button>
+      </div>
+    );
   }
 
   if (!auth.isAuthenticated) {

devfront/src/lib/auth.ts

@@ -3,7 +3,7 @@ import type { AuthProviderProps } from "react-oidc-context";
 
 export const oidcConfig: AuthProviderProps = {
   authority:
-    import.meta.env.VITE_OIDC_AUTHORITY || "http://localhost:5000/oidc", // Gateway Proxy URL
+    import.meta.env.VITE_OIDC_AUTHORITY || "https://sso.hmac.kr/oidc", // Gateway Proxy URL
   client_id: import.meta.env.VITE_OIDC_CLIENT_ID || "devfront",
   redirect_uri: `${window.location.origin}/auth/callback`,
   response_type: "code",