修复：全员清屏 DOM 选择器 ID 错误

- getElementById('say') → getElementById('chat-messages-container')
- getElementById('say2') → getElementById('chat-messages-container2')
- 这是清屏事件收到但页面无反应的根本原因

resources/views/chat/partials/scripts.blade.php

@@ -526,12 +526,12 @@
                 console.log('收到全员清屏事件:', e);
                 const operator = e.operator;
 
-                // 清除公聊窗口（say1）所有消息
-                const say1 = document.getElementById('say');
+                // 清除公聊窗口所有消息
+                const say1 = document.getElementById('chat-messages-container');
                 if (say1) say1.innerHTML = '';
 
-                // 清除包厢窗口（say2）中非悄悄话的消息
-                const say2 = document.getElementById('say2');
+                // 清除包厢窗口中非悄悄话的消息
+                const say2 = document.getElementById('chat-messages-container2');
                 if (say2) {
                     const items = say2.querySelectorAll('.msg-line');
                     items.forEach(item => {