✨ feat(endpoint types): add support for image generation models in endpoint type handling

common/endpoint_type.go

@@ -33,5 +33,9 @@ func GetEndpointTypesByChannelType(channelType int, modelName string) []constant
 			endpointTypes = []constant.EndpointType{constant.EndpointTypeOpenAI}
 		}
 	}
+	if IsImageGenerationModel(modelName) {
+		// add to first
+		endpointTypes = append([]constant.EndpointType{constant.EndpointTypeImageGeneration}, endpointTypes...)
+	}
 	return endpointTypes
 }