fix：参考金值，研听，研值工程通用通用工程公共能力，重点对比网络请求、登录认证、状态管理、本地存储、WebView、推送、版本更新、一键登录、主题/UI 等模块，确定后续统一整改方案

lib/common/network/dio_provider.dart

@@ -6,6 +6,8 @@ import 'package:riverpod_annotation/riverpod_annotation.dart';
 
 import '../config/app_config.dart';
 import '../storage/secure_identity_storage.dart';
+import '../../features/auth/application/auth_session_coordinator.dart';
+import 'api_exception.dart';
 import 'auth_interceptor.dart';
 import 'kratos_error_interceptor.dart';
 
@@ -26,7 +28,9 @@ AppConfig appConfig(Ref ref) => AppConfig.fromEnvironment();
 @Riverpod(keepAlive: true)
 Dio dio(Ref ref) {
   final config = ref.watch(appConfigProvider);
-  final identityStorage = ref.watch(secureIdentityStorageProvider);
+  final sessionStorage = ref.watch(authSessionStorageProvider);
+  final coordinator = ref.watch(authSessionCoordinatorProvider);
+  final backendOrigin = Uri.parse(config.apiBaseUrl);
   final d = Dio(
     BaseOptions(
       baseUrl: config.apiBaseUrl,
@@ -40,11 +44,57 @@ Dio dio(Ref ref) {
       },
     ),
   );
-  d.interceptors.add(AuthInterceptor(identityStorage));
+  d.interceptors.add(
+    AuthInterceptor(sessionStorage, backendOrigin: backendOrigin),
+  );
   d.interceptors.add(KratosErrorInterceptor());
+  d.interceptors.add(_SessionExpiryInterceptor(coordinator));
   if (!kReleaseMode) {
     d.interceptors.add(LogInterceptor(requestBody: false, responseBody: false));
+    d.interceptors.add(FancyDioInterceptor());
   }
-  d.interceptors.add(FancyDioInterceptor());
   return d;
 }
+
+/// Explicit name for new code. [dioProvider] remains as a compatibility alias
+/// while existing feature clients are migrated incrementally.
+final backendDioProvider = dioProvider;
+
+@Riverpod(keepAlive: true)
+Dio publicDio(Ref ref) => Dio(
+  BaseOptions(
+    connectTimeout: const Duration(seconds: 15),
+    receiveTimeout: const Duration(seconds: 30),
+  ),
+);
+
+class _SessionExpiryInterceptor extends Interceptor {
+  _SessionExpiryInterceptor(this._coordinator);
+
+  final AuthSessionCoordinator _coordinator;
+
+  @override
+  Future<void> onError(
+    DioException err,
+    ErrorInterceptorHandler handler,
+  ) async {
+    final exception = ApiException.from(err);
+    if (exception.isUnauthorized) {
+      // Network code only emits the session event. Navigation and presentation
+      // observe AuthState elsewhere.
+      try {
+        await _coordinator.expireIfNeeded(exception);
+      } catch (error, stackTrace) {
+        FlutterError.reportError(
+          FlutterErrorDetails(
+            exception: error,
+            stack: stackTrace,
+            library: 'jinzhi network',
+            context: ErrorDescription('while expiring an unauthorized session'),
+          ),
+        );
+      }
+    }
+    handler.next(err);
+  }
+}