修复gemini接口，添加豆包接口

app.py

@@ -101,6 +101,8 @@ def create_model_instance(model_id, settings, is_reasoning=False):
         api_key_id = "AlibabaApiKey"
     elif "gemini" in model_id.lower() or "google" in model_id.lower():
         api_key_id = "GoogleApiKey"
+    elif "doubao" in model_id.lower():
+        api_key_id = "DoubaoApiKey"
     
     # 首先尝试从本地配置获取API密钥
     api_key = get_api_key(api_key_id)
@@ -156,6 +158,10 @@ def create_model_instance(model_id, settings, is_reasoning=False):
             custom_base_url = api_base_urls.get('google')
             if custom_base_url:
                 base_url = custom_base_url
+        elif "doubao" in model_id.lower():
+            custom_base_url = api_base_urls.get('doubao')
+            if custom_base_url:
+                base_url = custom_base_url
     
     # 创建模型实例
     model_instance = ModelFactory.create_model(