火山引擎豆包图片模型下线，更新新的模型对应参数定死

byzs-module-ai/src/main/java/cn/iocoder/byzs/module/ai/service/image/AiImageServiceImpl.java

@@ -151,7 +151,7 @@ public class AiImageServiceImpl implements AiImageService {
                 if (reqVO.getPromptImage() != null) {
                     generateRequest.setImage(reqVO.getPromptImage());
                 }else{
-                    generateRequest.setSize(reqVO.getWidth() + "x" + reqVO.getHeight());
+                    generateRequest.setSize("2K");
                 }
                 // 调用豆包API生成图片
                 ImagesResponse imagesResponse = service.generateImages(generateRequest);