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/earnings/application/earnings_providers.dart

@@ -0,0 +1,18 @@
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+
+import '../../../core/network/api_response.dart';
+import '../../../core/providers.dart';
+import '../data/earnings_api.dart';
+import '../data/earnings_models.dart';
+
+final earningsApiProvider = Provider<EarningsApi>(
+  (ref) => EarningsApi(ref.watch(apiClientProvider)),
+);
+
+final earningsSummaryProvider =
+    FutureProvider.autoDispose<EarningsSummary>((ref) async {
+      final res = await ref.watch(earningsApiProvider).summary();
+      if (!res.isOk) throw ApiException(res.message);
+      if (res.data == null) throw const ApiException('收益数据为空');
+      return res.data!;
+    });