feat: OpenRouter Support & Improve Model Fetching ⇆ (#936)

* chore(ChatGPTClient.js): add support for OpenRouter API
chore(OpenAIClient.js): add support for OpenRouter API

* chore: comment out token debugging

* chore: add back streamResult assignment

* chore: remove double condition/assignment from merging

* refactor(routes/endpoints): -> controller/services logic

* feat: add openrouter model fetching

* chore: remove unused endpointsConfig in cleanupPreset function

* refactor: separate models concern from endpointsConfig

* refactor(data-provider): add TModels type and make TEndpointsConfig adaptible to new endpoint keys

* refactor: complete models endpoint service in data-provider

* refactor: onMutate for refreshToken and login, invalidate models query

* feat: complete models endpoint logic for frontend

* chore: remove requireJwtAuth from /api/endpoints and /api/models as not implemented yet

* fix: endpoint will not be overwritten and instead use active value

* feat: openrouter support for plugins

* chore(EndpointOptionsDialog): remove unused recoil value

* refactor(schemas/parseConvo): add handling of secondaryModels to use first of defined secondary models, which includes last selected one as first, or default to the convo's secondary model value

* refactor: remove hooks from store and move to hooks
refactor(switchToConversation): make switchToConversation use latest recoil state, which is necessary to get the most up-to-date models list, replace wrapper function
refactor(getDefaultConversation): factor out logic into 3 pieces to reduce complexity.

* fix: backend tests

* feat: optimistic update by calling newConvo when models are fetched

* feat: openrouter support for titling convos

* feat: cache models fetch

* chore: add missing dep to AuthContext useEffect

* chore: fix useTimeout types

* chore: delete old getDefaultConvo file

* chore: remove newConvo logic from Root, remove console log from api models caching

* chore: ensure bun is used for building in b:client script

* fix: default endpoint will not default to null on a completely fresh login (no localStorage/cookies)

* chore: add openrouter docs to free_ai_apis.md and .env.example

* chore: remove openrouter console logs

* feat: add debugging env variable for Plugins

client/src/store/conversation.ts

@@ -1,22 +1,6 @@
-import { useCallback } from 'react';
-import {
-  atom,
-  selector,
-  atomFamily,
-  useSetRecoilState,
-  useResetRecoilState,
-  useRecoilCallback,
-} from 'recoil';
-import {
-  TConversation,
-  TMessagesAtom,
-  TMessage,
-  TSubmission,
-  TPreset,
-} from 'librechat-data-provider';
-import { buildTree, getDefaultConversation } from '~/utils';
-import submission from './submission';
-import endpoints from './endpoints';
+import { atom, selector, atomFamily } from 'recoil';
+import { TConversation, TMessagesAtom, TMessage } from 'librechat-data-provider';
+import { buildTree } from '~/utils';
 
 const conversation = atom<TConversation | null>({
   key: 'conversation',
@@ -48,94 +32,10 @@ const messagesSiblingIdxFamily = atomFamily({
   default: 0,
 });
 
-const useConversation = () => {
-  const setConversation = useSetRecoilState(conversation);
-  const setMessages = useSetRecoilState<TMessagesAtom>(messages);
-  const setSubmission = useSetRecoilState<TSubmission | null>(submission.submission);
-  const resetLatestMessage = useResetRecoilState(latestMessage);
-
-  const _switchToConversation = (
-    conversation: TConversation,
-    messages: TMessagesAtom = null,
-    preset: object | null = null,
-    { endpointsConfig = {} },
-  ) => {
-    const { endpoint = null } = conversation;
-
-    if (endpoint === null) {
-      // get the default model
-      conversation = getDefaultConversation({
-        conversation,
-        endpointsConfig,
-        preset,
-      });
-    }
-
-    setConversation(conversation);
-    setMessages(messages);
-    setSubmission({} as TSubmission);
-    resetLatestMessage();
-  };
-
-  const switchToConversation = useRecoilCallback(
-    ({ snapshot }) =>
-      async (
-        _conversation: TConversation,
-        messages: TMessagesAtom = null,
-        preset: object | null = null,
-      ) => {
-        const endpointsConfig = await snapshot.getPromise(endpoints.endpointsConfig);
-        _switchToConversation(_conversation, messages, preset, {
-          endpointsConfig,
-        });
-      },
-    [],
-  );
-
-  const newConversation = useCallback(
-    (template = {}, preset?: TPreset) => {
-      switchToConversation(
-        {
-          conversationId: 'new',
-          title: 'New Chat',
-          ...template,
-          endpoint: null,
-          createdAt: '',
-          updatedAt: '',
-        },
-        [],
-        preset,
-      );
-    },
-    [switchToConversation],
-  );
-
-  const searchPlaceholderConversation = () => {
-    switchToConversation(
-      {
-        conversationId: 'search',
-        title: 'Search',
-        endpoint: null,
-        createdAt: '',
-        updatedAt: '',
-      },
-      [],
-    );
-  };
-
-  return {
-    _switchToConversation,
-    newConversation,
-    switchToConversation,
-    searchPlaceholderConversation,
-  };
-};
-
 export default {
   messages,
   conversation,
   messagesTree,
   latestMessage,
   messagesSiblingIdxFamily,
-  useConversation,
 };