🧭 fix: Robust 404 Conversation Not Found Redirect (#11853)

* fix: route to new conversation when conversation not found

* Addressed PR feedback

* fix: Robust 404 conversation redirect handling

- Extract `isNotFoundError` utility to `utils/errors.ts` so axios stays
  contained in one place rather than leaking into route/query layers
- Add `initialConvoQuery.isError` to the useEffect dependency array so
  the redirect actually fires when the 404 response arrives after other
  deps have already settled (was the root cause of the blank screen)
- Show a warning toast so users understand why they were redirected
- Add `com_ui_conversation_not_found` i18n key

* fix: Enhance error handling in getResponseStatus function

- Update the getResponseStatus function to ensure it correctly returns the status from error objects only if the status is a number. This improves robustness in error handling by preventing potential type issues.

* fix: Improve conversation not found handling in ChatRoute

- Enhance error handling when a conversation is not found by checking additional conditions before showing a warning toast.
- Update the newConversation function to include model data and preset options, improving user experience during error scenarios.

* fix: Log error details for conversation not found in ChatRoute

- Added logging for the initial conversation query error when a conversation is not found, improving debugging capabilities and error tracking in the ChatRoute component.

---------

Co-authored-by: Dan Lew <daniel@mightyacorn.com>

client/src/data-provider/queries.ts

@@ -31,7 +31,7 @@ import type {
   SharedLinksResponse,
 } from 'librechat-data-provider';
 import type { ConversationCursorData } from '~/utils/convos';
-import { findConversationInInfinite } from '~/utils';
+import { findConversationInInfinite, isNotFoundError } from '~/utils';
 
 export const useGetPresetsQuery = (
   config?: UseQueryOptions<TPreset[]>,
@@ -71,6 +71,12 @@ export const useGetConvoIdQuery = (
       refetchOnWindowFocus: false,
       refetchOnReconnect: false,
       refetchOnMount: false,
+      retry: (failureCount, error) => {
+        if (isNotFoundError(error)) {
+          return false;
+        }
+        return failureCount < 3;
+      },
       ...config,
     },
   );