fix: StreamProvider for login state, rename LoginState to avoid matrix SDK conflict

lib/features/auth/login_notifier.dart

@@ -1,5 +1,5 @@
 import 'package:flutter_riverpod/flutter_riverpod.dart';
-import 'package:matrix/matrix.dart';
+import 'package:matrix/matrix.dart' as mx;
 import 'package:pyramid/core/matrix_client.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -21,22 +21,22 @@ Future<void> saveHomeserver(WidgetRef ref, String url) async {
 
 enum LoginStatus { idle, loading, error }
 
-class LoginState {
+class LoginFormState {
   final LoginStatus status;
   final String? errorMessage;
 
-  const LoginState({this.status = LoginStatus.idle, this.errorMessage});
+  const LoginFormState({this.status = LoginStatus.idle, this.errorMessage});
 
-  LoginState copyWith({LoginStatus? status, String? errorMessage}) =>
-      LoginState(
+  LoginFormState copyWith({LoginStatus? status, String? errorMessage}) =>
+      LoginFormState(
         status: status ?? this.status,
         errorMessage: errorMessage,
       );
 }
 
-class LoginNotifier extends StateNotifier<LoginState> {
+class LoginNotifier extends StateNotifier<LoginFormState> {
   final Ref _ref;
-  LoginNotifier(this._ref) : super(const LoginState());
+  LoginNotifier(this._ref) : super(const LoginFormState());
 
   Future<void> login({
     required String username,
@@ -68,14 +68,14 @@ class LoginNotifier extends StateNotifier<LoginState> {
       await client.checkHomeserver(serverUri);
 
       await client.login(
-        LoginType.mLoginPassword,
-        identifier: AuthenticationUserIdentifier(user: username),
+        mx.LoginType.mLoginPassword,
+        identifier: mx.AuthenticationUserIdentifier(user: username),
         password: password,
         initialDeviceDisplayName: deviceName ?? 'Pyramid',
       );
 
       state = state.copyWith(status: LoginStatus.idle);
-    } on MatrixException catch (e) {
+    } on mx.MatrixException catch (e) {
       state = state.copyWith(
         status: LoginStatus.error,
         errorMessage: e.errorMessage,
@@ -90,11 +90,14 @@ class LoginNotifier extends StateNotifier<LoginState> {
 }
 
 final loginNotifierProvider =
-    StateNotifierProvider<LoginNotifier, LoginState>((ref) {
+    StateNotifierProvider<LoginNotifier, LoginFormState>((ref) {
   return LoginNotifier(ref);
 });
 
-final isLoggedInProvider = Provider<bool>((ref) {
-  final client = ref.watch(matrixClientProvider).valueOrNull;
-  return client?.isLogged() ?? false;
+final isLoggedInProvider = StreamProvider<bool>((ref) async* {
+  final client = await ref.watch(matrixClientProvider.future);
+  yield client.isLogged();
+  await for (final loginState in client.onLoginStateChanged.stream) {
+    yield loginState == mx.LoginState.loggedIn;
+  }
 });

lib/features/auth/login_page.dart

@@ -33,11 +33,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
           password: _passCtrl.text,
           homeserver: homeserver,
         );
-
-    final state = ref.read(loginNotifierProvider);
-    if (state.status == LoginStatus.idle && mounted) {
-      context.go('/rooms');
-    }
+    // Redirect erfolgt reaktiv über isLoggedInProvider → Router
   }
 
   @override
@@ -45,6 +41,7 @@ class _LoginPageState extends ConsumerState<LoginPage> {
     final theme = Theme.of(context);
     final loginState = ref.watch(loginNotifierProvider);
     final loading = loginState.status == LoginStatus.loading;
+
     final homeserver = ref.watch(homeserverProvider) ?? 'matrix.org';
 
     return Scaffold(