refactor(call): 优化通话控制器代码结构

- 添加 Flutter Cupertino 和 Material 组件库导入
- 导入直播充值弹窗组件
- 简化创建一对一 RTC 频道后的代码格式

lib/controller/message/call_controller.dart

@@ -6,11 +6,14 @@ import 'package:dating_touchme_app/model/rtc/chat_audio_product_model.dart';
 import 'package:dating_touchme_app/model/rtc/rtc_channel_data.dart';
 import 'package:dating_touchme_app/network/network_service.dart';
 import 'package:dating_touchme_app/rtc/rtc_manager.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
 import 'package:get/get.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
 import 'package:permission_handler/permission_handler.dart';
 
+import '../../widget/live/live_recharge_popup.dart';
 import '../discover/room_controller.dart';
 import '../overlay_controller.dart';
 import 'chat_controller.dart';
@@ -147,7 +150,6 @@ class CallController extends GetxController {
     final response = await _networkService.rtcApi.createOneOnOneRtcChannel({
       'type': type,
     });
-
     if (response.data.isSuccess && response.data.data != null) {
       rtcChannel.value = response.data.data;
       print('✅ 创建一对一RTC频道成功: ${response.data.data?.channelId}');