feat: 完成智能电网电工端 Flutter 应用初始化

创建完整的 Flutter 项目结构，包含 Android 和 iOS 平台配置、核心网络层、路由、状态管理及业务模块（订单、收益、认证），适配原 uni-app 项目功能逻辑

lib/features/auth/application/session_controller.dart

@@ -0,0 +1,100 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../../core/providers.dart';
+import '../../../core/storage/token_storage.dart';
+import '../data/auth_api.dart';
+import '../data/auth_models.dart';
+
+final authApiProvider = Provider<AuthApi>(
+  (ref) => AuthApi(ref.watch(apiClientProvider)),
+);
+
+class SessionState {
+  const SessionState({this.worker, required this.isLoggedIn});
+
+  final WorkerInfo? worker;
+  final bool isLoggedIn;
+
+  SessionState copyWith({WorkerInfo? worker, bool? isLoggedIn}) =>
+      SessionState(
+        worker: worker ?? this.worker,
+        isLoggedIn: isLoggedIn ?? this.isLoggedIn,
+      );
+}
+
+/// 登录态。对应源 `store/user.ts` 的登录/登出与本地缓存恢复。
+class SessionController extends Notifier<SessionState> {
+  TokenStorage get _storage => ref.read(tokenStorageProvider);
+
+  @override
+  SessionState build() {
+    // 拦截器判定会话失效（401）时，清空本地会话并回到登录页。
+    final sub = ref
+        .watch(apiClientProvider)
+        .onUnauthorized
+        .listen((_) => clearLocal());
+    ref.onDispose(sub.cancel);
+
+    final cached = _storage.userInfo;
+    return SessionState(
+      worker: cached == null ? null : WorkerInfo.fromJson(cached),
+      isLoggedIn: _storage.hasSession,
+    );
+  }
+
+  /// 登录成功后写入 token 与电工信息。
+  Future<void> login({
+    required String phone,
+    required String password,
+  }) async {
+    final res = await ref
+        .read(authApiProvider)
+        .login(phone: phone, password: password);
+    if (!res.isOk || res.data == null) {
+      throw AuthException(res.message.isEmpty ? '登录失败' : res.message);
+    }
+
+    final data = res.data!;
+    await _storage.setAccessToken(data.token);
+    await _storage.setUserInfo(data.workerInfo.toJson());
+    state = SessionState(worker: data.workerInfo, isLoggedIn: true);
+  }
+
+  /// 从后端刷新电工信息（「我的」页进入时调用）。
+  Future<WorkerInfo?> refreshProfile() async {
+    try {
+      final res = await ref.read(authApiProvider).profile();
+      if (res.isOk && res.data != null) {
+        final info = res.data!.basic;
+        await _storage.setUserInfo(info.toJson());
+        state = SessionState(worker: info, isLoggedIn: true);
+        return info;
+      }
+    } catch (_) {
+      // 拉取失败保持原状态
+    }
+    return null;
+  }
+
+  Future<void> logout() async {
+    await _storage.clearSession();
+    state = const SessionState(isLoggedIn: false, worker: null);
+  }
+
+  /// 清空本地会话但不跳转（被拦截器判定会话失效时调用）。
+  Future<void> clearLocal() => logout();
+}
+
+final sessionProvider = NotifierProvider<SessionController, SessionState>(
+  SessionController.new,
+);
+
+/// 会话层业务异常，携带后端返回的可读 message。
+class AuthException implements Exception {
+  const AuthException(this.message);
+
+  final String message;
+
+  @override
+  String toString() => message;
+}