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/runtime/runs/store/base.py

@@ -29,7 +29,6 @@ class RunStore(abc.ABC):
         kwargs: dict[str, Any] | None = None,
         error: str | None = None,
         created_at: str | None = None,
-        follow_up_to_run_id: str | None = None,
     ) -> None:
         pass
 

backend/packages/harness/deerflow/runtime/runs/store/memory.py

@@ -28,7 +28,6 @@ class MemoryRunStore(RunStore):
         kwargs=None,
         error=None,
         created_at=None,
-        follow_up_to_run_id=None,
     ):
         now = datetime.now(UTC).isoformat()
         self._runs[run_id] = {
@@ -41,7 +40,6 @@ class MemoryRunStore(RunStore):
             "metadata": metadata or {},
             "kwargs": kwargs or {},
             "error": error,
-            "follow_up_to_run_id": follow_up_to_run_id,
             "created_at": created_at or now,
             "updated_at": now,
         }