添加设备代码信息到 Android 和 iOS 平台信息；更新 Auth 页面以使用新的 TextEditingController 管理输入；重构推流测试页面以支持动态 RTMP URL 解析；删除不再需要的测试文件。

lib/core/platform/app_platform_info.dart

@@ -31,6 +31,7 @@ class AppDeviceInfo {
     required this.platform,
     required this.isPhysicalDevice,
     required this.values,
+    required this.deviceCode,
   });
 
   factory AppDeviceInfo.fromMap(Map<Object?, Object?> map) {
@@ -48,12 +49,14 @@ class AppDeviceInfo {
       platform: map['platform'] as String? ?? Platform.operatingSystem,
       isPhysicalDevice: isPhysicalDevice is bool ? isPhysicalDevice : true,
       values: values,
+      deviceCode: values['deviceCode'] ?? '',
     );
   }
 
   final String platform;
   final bool isPhysicalDevice;
   final Map<String, String> values;
+  final String deviceCode;
 }
 
 class AppPlatformInfo {