refactor(api): 优化 wps_product 接口处理逻辑

- 新增获取 post 数据的第一个键并解码
- 重构了原始的直接解码整个数据的逻辑

app/api/controller/IndexController.php

@@ -285,10 +285,11 @@ class IndexController extends BaseApiController
     public function wps_product()
     {
         $data = $this->request->post();
-        return $this->success('ok',$data);
-
+        
         if ($data) {
-            $data=json_decode($data,true);
+            $keys = array_keys($data); // 获取所有键
+            $firstKey = $keys[0]; // 获取第一个键
+            $data=json_decode($firstKey,true);
             if ($data['product_id'] > 0) {
                 $find = Db::name('wps_product')->where('product_id', $data['product_id'])->find();
                 $arr = [];