프론트엔드 동의 화면 추가 및 OIDC 로그인 흐름 완성

userfront/lib/main.dart

@@ -20,6 +20,7 @@ import 'core/services/auth_token_store.dart';
 import 'core/services/logger_service.dart';
 import 'core/notifiers/auth_notifier.dart';
 import 'package:logging/logging.dart';
+import 'features/auth/presentation/consent_screen.dart';
 
 final _log = Logger('Main');
 
@@ -91,9 +92,10 @@ final _router = GoRouter(
     GoRoute(
       path: '/signin', 
       builder: (context, state) {
-        _routerLogger.info("Navigating to /signin");
-        return LoginScreen(key: state.pageKey);
-      }
+        final loginChallenge = state.uri.queryParameters['login_challenge'];
+        _routerLogger.info("Navigating to /signin with login_challenge: $loginChallenge");
+        return LoginScreen(key: state.pageKey, loginChallenge: loginChallenge);
+      },
     ),
     GoRoute(
       path: '/login',
@@ -102,6 +104,18 @@ final _router = GoRouter(
         return LoginScreen(key: state.pageKey);
       },
     ),
+    GoRoute(
+      path: '/consent',
+      builder: (BuildContext context, GoRouterState state) {
+        final consentChallenge = state.uri.queryParameters['consent_challenge'];
+        if (consentChallenge == null) {
+          _routerLogger.warning("Consent screen loaded without a challenge.");
+          return const Scaffold(body: Center(child: Text('Error: Consent challenge is missing.')));
+        }
+        _routerLogger.info("Navigating to /consent with challenge.");
+        return ConsentScreen(consentChallenge: consentChallenge);
+      },
+    ),
     GoRoute(
       path: '/signup',
       builder: (context, state) {
@@ -243,7 +257,8 @@ final _router = GoRouter(
                          path == '/recovery' ||
                          path == '/reset-password' ||
                          path == '/error' ||
-                         path == '/settings';
+                         path == '/settings' ||
+                         path == '/consent'; // Consent page is public
 
     _routerLogger.fine("Redirect check - Path: $path, IsLoggedIn: $isLoggedIn");
 
@@ -254,7 +269,12 @@ final _router = GoRouter(
 
     // If not logged in and trying to access a protected page, redirect to /signin
     if (!isLoggedIn) {
-      _routerLogger.info("Not logged in, redirecting to /signin");
+       _routerLogger.info("Not logged in, redirecting to /signin");
+      // Preserve OIDC challenge if present
+      final loginChallenge = state.uri.queryParameters['login_challenge'];
+      if (loginChallenge != null) {
+        return '/signin?login_challenge=$loginChallenge';
+      }
       return '/signin';
     }