优化base64字符串图片显示判断

lib/pages/ai-draw-image-result/controller.dart

@@ -205,7 +205,7 @@ class AIDrawImageResultController extends GetxController {
             EasyLoading.showError("AI生成图片错误：imageUrl为null");
           }
         }
-        final progressBase64 = model.progressBase64 ?? "";
+        final progressBase64 = model.progressBase64?.replaceAll("data:image/png;base64,", "") ?? "";
         if (model.response?.imageUrl != null) {
           imageUrl.value = model.response?.imageUrl ?? "" ;
         } else if (model.progressImageUrl != null) {