style(组件): 优化流量池选择组件头像显示样式

将PoolSelection组件中的头像显示从Avatar组件改为显示名称首字母的div，提升视觉一致性

Cunkebao/src/components/PoolSelection/index.tsx

@@ -82,7 +82,9 @@ export default function PoolSelection({
           {selectedOptions.map(item => (
             <div key={item.id} className={style.selectedListRow}>
               <div className={style.selectedListRowContent}>
-                <Avatar src={item.avatar} />
+                <div className={style.groupAvatar}>
+                  {(item.nickname || item.name || "").charAt(0)}
+                </div>
                 <div className={style.selectedListRowContentText}>
                   <div>{item.nickname || item.name}</div>
                   <div>{item.wechatId || item.mobile}</div>

Cunkebao/src/pages/mobile/test/select.tsx

@@ -36,7 +36,7 @@ const ComponentTest: React.FC = () => {
   const [selectedFriendsOptions, setSelectedFriendsOptions] = useState<
     FriendSelectionItem[]
   >([]);
-  
+
   // 流量池选择状态
   const [selectedPools, setSelectedPools] = useState<PoolSelectionItem[]>([]);
   return (
@@ -160,7 +160,7 @@ const ComponentTest: React.FC = () => {
               </div>
             </div>
           </Tabs.Tab>
-          
+
           <Tabs.Tab title="流量池选择" key="pools">
             <div style={{ padding: "16px 0" }}>
               <h3 style={{ marginBottom: 16 }}>PoolSelection 组件测试</h3>