feat: enhance chat history loading with new hooks and UI components (#2338)

* Refactor API fetch calls to use a unified fetch function; enhance chat history loading with new hooks and UI components

- Replaced `fetchWithAuth` with a generic `fetch` function across various API modules for consistency.
- Updated `useThreadStream` and `useThreadHistory` hooks to manage chat history loading, including loading states and pagination.
- Introduced `LoadMoreHistoryIndicator` component for better user experience when loading more chat history.
- Enhanced message handling in `MessageList` to accommodate new loading states and history management.
- Added support for run messages in the thread context, improving the overall message handling logic.
- Updated translations for loading indicators in English and Chinese.

* Fix test assertions for run ordering in RunManager tests

- Updated assertions in `test_list_by_thread` to reflect correct ordering of runs.
- Modified `test_list_by_thread_is_stable_when_timestamps_tie` to ensure stable ordering when timestamps are tied.

backend/packages/harness/deerflow/agents/middlewares/uploads_middleware.py

@@ -279,6 +279,7 @@ class UploadsMiddleware(AgentMiddleware[UploadsMiddlewareState]):
         updated_message = HumanMessage(
             content=f"{files_message}\n\n{original_content}",
             id=last_message.id,
+            name=last_message.name,
             additional_kwargs=last_message.additional_kwargs,
         )