refactor(api): 优化用户协议接口

- 将 userAgreement 函数直接导出，简化模块结构
- 删除多余的空行，提高代码可读性

api/agreement.js

@@ -1,15 +1,11 @@
 import http from '../common/axios.js'
 
-//获取用户协议
-function userAgreement(data) {
-	let url = '/agreement/'+data
-	return http.get(url,data).then(res => {
-		return res;
-	})
-}
-
-
-
 export default {
-	userAgreement,
+    //获取用户协议
+    userAgreement(data) {
+        let url = '/agreement/' + data
+        return http.get(url, data).then(res => {
+            return res;
+        })
+    }
 }