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

pubspec.yaml

@@ -0,0 +1,36 @@
+name: smart_grid_iot_app_flutter
+description: "VoltLink 共享电工平台 - 电工端 App"
+publish_to: 'none'
+
+version: 1.0.0+100
+
+environment:
+  sdk: ^3.11.5
+
+dependencies:
+  flutter:
+    sdk: flutter
+  flutter_localizations:
+    sdk: flutter
+
+  cupertino_icons: ^1.0.8
+  flutter_riverpod: ^3.3.2
+  go_router: ^17.5.0
+  dio: ^5.11.1
+  shared_preferences: ^2.5.5
+  flutter_svg: ^2.3.0
+
+dev_dependencies:
+  flutter_test:
+    sdk: flutter
+
+  flutter_lints: ^6.0.0
+
+flutter:
+  uses-material-design: true
+
+  # 源工程 iconfont（8 个字形）原样搬运，Tab 栏/品牌闪电/通知/微信图标逐像素一致。
+  fonts:
+    - family: iconfont
+      fonts:
+        - asset: assets/fonts/iconfont.ttf