Refactor input field in TrendApplyPage for improved clarity

- Simplified the input field for the search keyword by removing the placeholder text, enhancing the user interface while maintaining functionality.

src/app/(dashboard)/content/trend-apply/page.tsx

@@ -337,11 +337,7 @@ const TrendApplyPage: React.FC = () => {
       <div className="bg-white p-4 rounded-lg shadow mb-4">
         <Form form={searchForm} layout="inline" className="gap-x-2 gap-y-4">
           <Form.Item label="关键字" name="searchKeyword">
-            <Input
-              placeholder="昵称/用户编号"
-              allowClear
-              style={{ width: 180 }}
-            />
+            <Input allowClear style={{ width: 180 }} />
           </Form.Item>
           <Form.Item label="状态" name="status">
             <Select placeholder="请选择状态" allowClear style={{ width: 140 }}>