feat(user): 微信小程序登录接口返回用户openid

- 调用微信jscode2session接口时同时获取session_key和openid
- 在登录响应中添加openid字段返回给客户端
- 解密手机号逻辑保持不变，仅增加openid数据处理

app/controller/api/user/UserMp.php

@@ -95,7 +95,7 @@ class UserMp extends BaseController
             $appid = 'wx9082e5ac2fdb513f';
             $secret = 'e334c41e1c4aa962f65d1882092fbda6';
 
-            // 1. 调用微信 jscode2session 接口获取 session_key
+            // 1. 调用微信 jscode2session 接口获取 session_key 和 openid
             $url = "https://api.weixin.qq.com/sns/jscode2session?appid=" . $appid . "&secret=" . $secret . "&js_code=" . $data['code'] . "&grant_type=authorization_code";
             $wxResult = curlGet($url);
             if (!$wxResult || !isset($wxResult['session_key'])) {
@@ -103,6 +103,7 @@ class UserMp extends BaseController
                 return app('json')->fail('微信登录凭证校验失败');
             }
             $sessionKey = $wxResult['session_key'];
+            $openid = $wxResult['openid'] ?? '';
 
             // 2. 解密手机号
             $sessionKey = str_replace(' ', '+', $sessionKey);
@@ -173,7 +174,10 @@ class UserMp extends BaseController
             $tokenInfo = $repository->createToken($user);
             $repository->loginAfter($user);
 
-            return app('json')->success(array_merge($repository->returnToken($user, $tokenInfo), ['is_new' => $isnew ? 1 : 0]));
+            return app('json')->success(array_merge($repository->returnToken($user, $tokenInfo), [
+                'is_new' => $isnew ? 1 : 0,
+                'openid' => $openid,
+            ]));
 
         } catch (\Exception $e) {
             Db::name('log')->insert(['data' => 'mpLogin出错：' . $e->getFile() . '：' . $e->getLine() . '【' . $e->getMessage() . '】']);