🎨 Use feature based folder structure

lib/auth/web_auth/web_auth_providers.dart

@@ -0,0 +1,56 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'web_auth_server.dart';
+
+class WebAuthServerState {
+  final bool isRunning;
+  final int? port;
+  final Object? error;
+
+  WebAuthServerState({this.isRunning = false, this.port, this.error});
+
+  WebAuthServerState copyWith({
+    bool? isRunning,
+    int? port,
+    Object? error,
+    bool clearError = false,
+  }) {
+    return WebAuthServerState(
+      isRunning: isRunning ?? this.isRunning,
+      port: port ?? this.port,
+      error: clearError ? null : error ?? this.error,
+    );
+  }
+}
+
+class WebAuthServerNotifier extends Notifier<WebAuthServerState> {
+  late final WebAuthServer _server;
+
+  @override
+  WebAuthServerState build() {
+    _server = ref.watch(webAuthServerProvider);
+    return WebAuthServerState();
+  }
+
+  Future<void> start() async {
+    try {
+      final port = await _server.start();
+      state = state.copyWith(isRunning: true, port: port, clearError: true);
+    } catch (e) {
+      state = state.copyWith(isRunning: false, error: e);
+    }
+  }
+
+  void stop() {
+    _server.stop();
+    state = state.copyWith(isRunning: false, port: null);
+  }
+}
+
+final webAuthServerProvider = Provider<WebAuthServer>((ref) {
+  return WebAuthServer(ref);
+});
+
+final webAuthServerStateProvider =
+    NotifierProvider<WebAuthServerNotifier, WebAuthServerState>(
+      WebAuthServerNotifier.new,
+    );