fix(printer): 修复打印机更新逻辑以使用传入的实体数据

- 在更新方法中先获取现有打印机实体
- 检查景区是否启用打印功能
- 使用传入的payload实体进行更新操作
- 保持原有的成功或失败响应结构

src/main/java/com/ycwl/basic/service/printer/impl/PrinterServiceImpl.java

@@ -158,13 +158,14 @@ public class PrinterServiceImpl implements PrinterService {
     }
 
     @Override
-    public ApiResponse<Integer> update(PrinterEntity entity) {
+    public ApiResponse<Integer> update(PrinterEntity payload) {
+        PrinterEntity entity = printerMapper.getById(payload.getId());
         ScenicConfigManager scenicConfig = scenicRepository.getScenicConfigManager(entity.getScenicId());
         Boolean printEnable = scenicConfig.getBoolean("print_enable");
         if (!Boolean.TRUE.equals(printEnable)) {
             return ApiResponse.fail("景区没有开启打印功能!");
         }
-        return ApiResponse.success(printerMapper.update(entity));
+        return ApiResponse.success(printerMapper.update(payload));
     }
 
     @Override