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/manager.py

@@ -54,7 +54,7 @@ class RunManager:
         self._lock = asyncio.Lock()
         self._store = store
 
-    async def _persist_to_store(self, record: RunRecord, *, follow_up_to_run_id: str | None = None) -> None:
+    async def _persist_to_store(self, record: RunRecord) -> None:
         """Best-effort persist run record to backing store."""
         if self._store is None:
             return
@@ -68,7 +68,6 @@ class RunManager:
                 metadata=record.metadata or {},
                 kwargs=record.kwargs or {},
                 created_at=record.created_at,
-                follow_up_to_run_id=follow_up_to_run_id,
             )
         except Exception:
             logger.warning("Failed to persist run %s to store", record.run_id, exc_info=True)
@@ -90,7 +89,6 @@ class RunManager:
         metadata: dict | None = None,
         kwargs: dict | None = None,
         multitask_strategy: str = "reject",
-        follow_up_to_run_id: str | None = None,
     ) -> RunRecord:
         """Create a new pending run and register it."""
         run_id = str(uuid.uuid4())
@@ -109,7 +107,7 @@ class RunManager:
         )
         async with self._lock:
             self._runs[run_id] = record
-        await self._persist_to_store(record, follow_up_to_run_id=follow_up_to_run_id)
+        await self._persist_to_store(record)
         logger.info("Run created: run_id=%s thread_id=%s", run_id, thread_id)
         return record
 
@@ -122,7 +120,7 @@ class RunManager:
         async with self._lock:
             # Dict insertion order matches creation order, so reversing it gives
             # us deterministic newest-first results even when timestamps tie.
-            return [r for r in reversed(self._runs.values()) if r.thread_id == thread_id]
+            return [r for r in self._runs.values() if r.thread_id == thread_id]
 
     async def set_status(self, run_id: str, status: RunStatus, *, error: str | None = None) -> None:
         """Transition a run to a new status."""
@@ -176,7 +174,6 @@ class RunManager:
         metadata: dict | None = None,
         kwargs: dict | None = None,
         multitask_strategy: str = "reject",
-        follow_up_to_run_id: str | None = None,
     ) -> RunRecord:
         """Atomically check for inflight runs and create a new one.
 
@@ -230,7 +227,7 @@ class RunManager:
             )
             self._runs[run_id] = record
 
-        await self._persist_to_store(record, follow_up_to_run_id=follow_up_to_run_id)
+        await self._persist_to_store(record)
         logger.info("Run created: run_id=%s thread_id=%s", run_id, thread_id)
         return record