fix(system): 修复微信支付配置中的证书路径

- 移除了不必要的 "file" 目录拼接
- 优化了私钥和证书路径的生成逻辑

src/main/java/com/gxwebsoft/common/system/service/impl/SettingServiceImpl.java

@@ -179,8 +179,8 @@ public class SettingServiceImpl extends ServiceImpl<SettingMapper, Setting> impl
         final JSONObject jsonObject = JSONObject.parseObject(data.getContent());
         final String mchId = jsonObject.getString("mchId");
         final String apiclientKey = jsonObject.getString("apiclientKey");
-        final String privateKey = pathConfig.getUploadPath().concat("file").concat(apiclientKey);
-        final String apiclientCert = pathConfig.getUploadPath().concat("file").concat(jsonObject.getString("apiclientCert"));
+        final String privateKey = pathConfig.getUploadPath().concat(apiclientKey);
+        final String apiclientCert = pathConfig.getUploadPath().concat(jsonObject.getString("apiclientCert"));
         final String merchantSerialNumber = jsonObject.getString("merchantSerialNumber");
         final String apiV3key = jsonObject.getString("wechatApiKey");
         if(config == null){