docs(webrtc_controller_flutter): 更新项目文档以反映重构后的架构

AGENTS.md 与 README.md 同步更新：根据实际代码结构重写目录树、技术栈、架构分层及编码规范，移除旧版内联示例并补充新的开发约定与代码生成命令。

webrtc_controller_flutter/lib/app/router/app_router.dart

@@ -0,0 +1,21 @@
+import 'package:go_router/go_router.dart';
+
+import '../../features/connection/presentation/pages/control_page.dart';
+import '../../features/connection/presentation/pages/setup_page.dart';
+
+/// 应用路由：/ = 连接设置页，/control = 控制面板页。
+final appRouter = GoRouter(
+  initialLocation: '/',
+  routes: [
+    GoRoute(
+      path: '/',
+      name: 'setup',
+      builder: (context, state) => const SetupPage(),
+    ),
+    GoRoute(
+      path: '/control',
+      name: 'control',
+      builder: (context, state) => const ControlPage(),
+    ),
+  ],
+);