feat: 完成图片模型单独扣费

Yi.Abp.Net8/module/ai-hub/Yi.Framework.AiHub.Application/Jobs/ImageGenerationJob.cs

@@ -64,6 +64,13 @@ public class ImageGenerationJob : AsyncBackgroundJob<ImageGenerationJobArgs>, IT
             {
                 contents = new[]
                 {
+                    new
+                    {
+                        role = "user", parts = new List<object>
+                        {
+                            new { text = "我只要图片，直接生成图片，不要询问我" }
+                        }
+                    },
                     new { role = "user", parts }
                 }
             };