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

ios/Runner/AppDelegate.swift

@@ -0,0 +1,16 @@
+import Flutter
+import UIKit
+
+@main
+@objc class AppDelegate: FlutterAppDelegate, FlutterImplicitEngineDelegate {
+  override func application(
+    _ application: UIApplication,
+    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
+  ) -> Bool {
+    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
+  }
+
+  func didInitializeImplicitFlutterEngine(_ engineBridge: FlutterImplicitEngineBridge) {
+    GeneratedPluginRegistrant.register(with: engineBridge.pluginRegistry)
+  }
+}