feat: 优化 Agent 运行时与聊天设置体验

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

@@ -48,3 +48,26 @@ def test_convert_message_to_history_uses_ui_schema_key_for_assistant_message() -
     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_returns_multiple_user_attachments() -> None:
+    message = _FakeMessage(
+        role="user",
+        metadata={
+            "user_message_attachments": [
+                {"bucket": "bucket-a", "path": "path/a.png", "mime_type": "image/png"},
+                {"bucket": "bucket-a", "path": "path/b.jpg", "mime_type": "image/jpeg"},
+            ]
+        },
+    )
+
+    def _signed(payload: dict[str, str]) -> str:
+        return f"https://signed.example/{payload['bucket']}/{payload['path']}"
+
+    result = convert_message_to_history(message, _signed)  # type: ignore[arg-type]
+
+    attachments = result.get("attachments")
+    assert isinstance(attachments, list)
+    assert len(attachments) == 2
+    assert attachments[0]["mimeType"] == "image/png"
+    assert attachments[1]["mimeType"] == "image/jpeg"