feat(live): 添加直播间页面跳转功能

- 在 draggable_overlay_widget.dart 中引入 LiveRoomPage
- 为可拖拽覆盖组件添加点击事件，跳转至直播间页面
- 优化直播间页面关闭逻辑，确保返回上级页面时正确隐藏覆盖层

lib/pages/discover/live_room_page.dart

@@ -177,8 +177,8 @@ class _LiveRoomPageState extends State<LiveRoomPage> {
                               popularityText: popularityText,
                               avatarAsset: avatarAsset,
                               onCloseTap: () {
-                                Get.back();
                                 _overlayController.toggle();
+                                Get.back();
                               },
                             );
                           }),

lib/widget/live/draggable_overlay_widget.dart

@@ -1,5 +1,7 @@
 import 'package:agora_rtc_engine/agora_rtc_engine.dart';
 import 'package:dating_touchme_app/controller/discover/room_controller.dart';
+import 'package:dating_touchme_app/extension/ex_widget.dart';
+import 'package:dating_touchme_app/pages/discover/live_room_page.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_screenutil/flutter_screenutil.dart';
 import 'package:get/get.dart';
@@ -185,7 +187,10 @@ class _DraggableOverlayWidgetState extends State<DraggableOverlayWidget> {
               ],
             ),
           ),
-        );
+        ).onTap(() {
+          Get.to(() => const LiveRoomPage(id: 0));
+          widget.onClose?.call();
+        });
       }),
     );
   }