fix(sms): 修复短信发送接口返回值

- 在短信发送成功后添加 JSON 返回值
- 返回代码 0 表示成功，消息为 "ok"

app/controller/SmsController.php

@@ -101,6 +101,7 @@ class SmsController
         $smsContent->content = $request->input('content', '');
         $smsContent->ip = $request->getRemoteIp() . ":" . $request->getRemotePort();
         $smsContent->save();
+        return json(['code' => 0, 'msg' => 'ok']);
     }
 
     public function app(Request $request)