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.

frontend/src/core/api/feedback.ts

@@ -1,6 +1,6 @@
 import { getBackendBaseURL } from "../config";
 
-import { fetchWithAuth } from "./fetcher";
+import { fetch } from "./fetcher";
 
 export interface FeedbackData {
   feedback_id: string;
@@ -14,7 +14,7 @@ export async function upsertFeedback(
   rating: number,
   comment?: string,
 ): Promise<FeedbackData> {
-  const res = await fetchWithAuth(
+  const res = await fetch(
     `${getBackendBaseURL()}/api/threads/${encodeURIComponent(threadId)}/runs/${encodeURIComponent(runId)}/feedback`,
     {
       method: "PUT",
@@ -32,7 +32,7 @@ export async function deleteFeedback(
   threadId: string,
   runId: string,
 ): Promise<void> {
-  const res = await fetchWithAuth(
+  const res = await fetch(
     `${getBackendBaseURL()}/api/threads/${encodeURIComponent(threadId)}/runs/${encodeURIComponent(runId)}/feedback`,
     { method: "DELETE" },
   );