新增聊天窗口擴展功能：在樣式中添加擴展區域，並在聊天窗口中新增「跟進提醒」和「待辦事項」按鈕，提升用戶互動性。

Touchkebao/src/pages/pc/ckbox/weChat/components/ChatWindow/ChatWindow.module.scss

@@ -9,6 +9,12 @@
   display: flex;
   flex-direction: column;
   min-width: 0;
+  .extend {
+    background: #fff;
+    padding: 10px 16px;
+    display: flex;
+    gap: 16px;
+  }
 }
 
 .chatHeader {

Touchkebao/src/pages/pc/ckbox/weChat/components/ChatWindow/index.tsx

@@ -5,6 +5,8 @@ import {
   TeamOutlined,
   RobotOutlined,
   DownOutlined,
+  BellOutlined,
+  CheckSquareOutlined,
 } from "@ant-design/icons";
 import { ContractData, weChatGroup } from "@/pages/pc/ckbox/data";
 import styles from "./ChatWindow.module.scss";
@@ -112,6 +114,10 @@ const ChatWindow: React.FC<ChatWindowProps> = ({ contract }) => {
             </Tooltip>
           </Space>
         </Header>
+        <div className={styles.extend}>
+          <Button icon={<BellOutlined />}>跟进提醒</Button>
+          <Button icon={<CheckSquareOutlined />}>待办事项</Button>
+        </div>
 
         {/* 聊天内容 */}
         <Content className={styles.chatContent}>