chore(agent): use Chinese labels in user message context

test/agent/test_workflow_prompts.py

@@ -55,14 +55,16 @@ def test_user_message_carries_turn_context():
     form = {"vehicle_count": 0, "has_injury": False, "is_on_scene": False}
     message = _build_user_message({"input_text": "两辆", "accident_fields": form}, now=now)
     assert "<turn_context>" in message
-    form_line = next(line for line in message.splitlines() if line.startswith("form："))
-    assert json.loads(form_line.removeprefix("form：")) == form
-    unfilled_line = next(line for line in message.splitlines() if line.startswith("form_unfilled_fields："))
-    assert json.loads(unfilled_line.removeprefix("form_unfilled_fields：")) == [
+    form_line = next(line for line in message.splitlines() if line.startswith("当前表单："))
+    assert json.loads(form_line.removeprefix("当前表单：")) == form
+    unfilled_line = next(line for line in message.splitlines() if line.startswith("表单未填写字段："))
+    assert json.loads(unfilled_line.removeprefix("表单未填写字段：")) == [
         "accident_cause", "has_non_motor_vehicle_hit", "accident_time",
     ]
     empty_message = _build_user_message({"input_text": "两辆"}, now=now)
-    assert "form_unfilled_fields" not in empty_message
+    assert "表单未填写字段" not in empty_message
+    assert "form：" not in message
+    assert "form_unfilled_fields：" not in message
     assert "本轮参考时间：2026-10-22 08:00:00 +0000" in message
     assert "<user_input>" in message
     assert "两辆" in message
@@ -73,7 +75,7 @@ def test_workflow_collection_receives_form_in_user_context():
     node = next(n for n in workflow["nodes"] if n["name"] == "事故信息收集")
     message = next(i["value"] for i in node["inputs"] if i["key"] == "userChatInput")
     context = message.split("</turn_context>", 1)[0]
-    assert "form：{{$VARIABLE_NODE_ID.bNJkeXot$}}" in context
+    assert "当前表单：{{$VARIABLE_NODE_ID.bNJkeXot$}}" in context
 
 
 @pytest.mark.asyncio