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

common/model.go

@@ -9,11 +9,32 @@ var (
 		"o3-deep-research",
 		"o4-mini-deep-research",
 	}
+	ImageGenerationModels = []string{
+		"dall-e-3",
+		"dall-e-2",
+		"gpt-image-1",
+		"prefix:imagen-",
+		"flux-",
+		"flux.1-",
+	}
 )
 
 func IsOpenAIResponseOnlyModel(modelName string) bool {
 	for _, m := range OpenAIResponseOnlyModels {
-		if strings.Contains(m, modelName) {
+		if strings.Contains(modelName, m) {
+			return true
+		}
+	}
+	return false
+}
+
+func IsImageGenerationModel(modelName string) bool {
+	modelName = strings.ToLower(modelName)
+	for _, m := range ImageGenerationModels {
+		if strings.Contains(modelName, m) {
+			return true
+		}
+		if strings.HasPrefix(m, "prefix:") && strings.HasPrefix(modelName, strings.TrimPrefix(m, "prefix:")) {
 			return true
 		}
 	}