diff --git a/wwwroot/api/agent_chat_generic.dspy b/wwwroot/api/agent_chat_generic.dspy
index 74dd82b..943b6bf 100644
--- a/wwwroot/api/agent_chat_generic.dspy
+++ b/wwwroot/api/agent_chat_generic.dspy
@@ -26,8 +26,12 @@ if action == 'send_message':
     from pipeline_service.gateway import get_gateway
     gateway = get_gateway()
 
+    # 前端模型下拉选中的模型必须透传——之前忽略导致用户选了模型仍走默认值，
+    # 默认模型名与 llm 表不匹配时直接"无可用模型"卡死。
+    model_id = (params_kw or {}).get('model_id', '') or ''
+
     async def agent_stream():
-        async for chunk in gateway.run_message("web", uid, prompt, generic=True):
+        async for chunk in gateway.run_message("web", uid, prompt, generic=True, model_id=model_id):
             data = json.loads(chunk)
             t = data.get('type', '')
             if t == 'tool_call':