test: 更新 AgentScope 相关单元测试与集成测试

- 重命名 test_react_runner.py 为 test_runner.py
- 新增 test_utils.py 测试工具函数
- 更新现有测试用例适配新架构

backend/tests/unit/v1/agent/test_utils.py

@@ -0,0 +1,50 @@
+from __future__ import annotations
+
+from datetime import datetime, timezone
+from uuid import uuid4
+
+from v1.agent.utils import convert_message_to_history
+
+
+class _FakeMessage:
+    def __init__(self, *, role: str, metadata: dict[str, object] | None) -> None:
+        self.id = uuid4()
+        self.seq = 1
+        self.role = role
+        self.content = "content"
+        self.metadata = metadata
+        self.timestamp = datetime.now(timezone.utc)
+
+
+def test_convert_message_to_history_uses_ui_schema_key_for_tool_message() -> None:
+    message = _FakeMessage(
+        role="tool",
+        metadata={
+            "tool_agent_output": {
+                "ui_schema": {"version": "2.0", "root": {"type": "stack"}}
+            }
+        },
+    )
+
+    result = convert_message_to_history(message)  # type: ignore[arg-type]
+
+    assert "ui_schema" in result
+    assert "uiSchema" not in result
+    assert result["ui_schema"] == {"version": "2.0", "root": {"type": "stack"}}
+
+
+def test_convert_message_to_history_uses_ui_schema_key_for_assistant_message() -> None:
+    message = _FakeMessage(
+        role="assistant",
+        metadata={
+            "worker_agent_output": {
+                "ui_schema": {"version": "2.0", "root": {"type": "stack"}}
+            }
+        },
+    )
+
+    result = convert_message_to_history(message)  # type: ignore[arg-type]
+
+    assert "ui_schema" in result
+    assert "uiSchema" not in result
+    assert result["ui_schema"] == {"version": "2.0", "root": {"type": "stack"}}