fix(dealer):优化客户交易页面搜索功能

- 移除搜索关键字长度限制提示
- 注释掉清空搜索功能相关代码
- 修改搜索框onChange事件替代onSearch和onClear事件
- 简化搜索逻辑处理流程

src/dealer/customer/trading.tsx

@@ -91,10 +91,6 @@ const CustomerTrading = () => {
   // 搜索处理函数
   const handleSearch = (keyword: string) => {
     if(keyword.length < 4){
-      Taro.showToast({
-        title: '请输入至少4个字符',
-        icon: 'none'
-      });
       return;
     }
     setSearchValue(keyword);
@@ -105,13 +101,13 @@ const CustomerTrading = () => {
   };
 
   // 清空搜索
-  const handleClearSearch = () => {
-    setSearchValue('');
-    setList([]);
-    setPage(1);
-    setHasMore(true);
-    fetchCustomerData(true, 1, '');
-  };
+  // const handleClearSearch = () => {
+  //   setSearchValue('');
+  //   setList([]);
+  //   setPage(1);
+  //   setHasMore(true);
+  //   fetchCustomerData(true, 1, '');
+  // };
 
   // 渲染客户项
   const renderCustomerItem = (customer: CustomerUser) => (
@@ -192,8 +188,7 @@ const CustomerTrading = () => {
         <SearchBar
           placeholder="请输入搜索关键词"
           value={searchValue}
-          onSearch={(value) => handleSearch(value)}
-          onClear={() => handleClearSearch()}
+          onChange={(value) => handleSearch(value)}
         />
       </View>