💫 feat: Config File & Custom Endpoints (#1474)

* WIP(backend/api): custom endpoint

* WIP(frontend/client): custom endpoint

* chore: adjust typedefs for configs

* refactor: use data-provider for cache keys and rename enums and custom endpoint for better clarity and compatibility

* feat: loadYaml utility

* refactor: rename back to  from  and proof-of-concept for creating schemas from user-defined defaults

* refactor: remove custom endpoint from default endpointsConfig as it will be exclusively managed by yaml config

* refactor(EndpointController): rename variables for clarity

* feat: initial load custom config

* feat(server/utils): add simple `isUserProvided` helper

* chore(types): update TConfig type

* refactor: remove custom endpoint handling from model services as will be handled by config, modularize fetching of models

* feat: loadCustomConfig, loadConfigEndpoints, loadConfigModels

* chore: reorganize server init imports, invoke loadCustomConfig

* refactor(loadConfigEndpoints/Models): return each custom endpoint as standalone endpoint

* refactor(Endpoint/ModelController): spread config values after default (temporary)

* chore(client): fix type issues

* WIP: first pass for multiple custom endpoints
- add endpointType to Conversation schema
- add update zod schemas for both convo/presets to allow non-EModelEndpoint value as endpoint (also using type assertion)
- use `endpointType` value as `endpoint` where mapping to type is necessary using this field
- use custom defined `endpoint` value and not type for mapping to modelsConfig
- misc: add return type to `getDefaultEndpoint`
- in `useNewConvo`, add the endpointType if it wasn't already added to conversation
- EndpointsMenu: use user-defined endpoint name as Title in menu
- TODO: custom icon via custom config, change unknown to robot icon

* refactor(parseConvo): pass args as an object and change where used accordingly; chore: comment out 'create schema' code

* chore: remove unused availableModels field in TConfig type

* refactor(parseCompactConvo): pass args as an object and change where used accordingly

* feat: chat through custom endpoint

* chore(message/convoSchemas): avoid saving empty arrays

* fix(BaseClient/saveMessageToDatabase): save endpointType

* refactor(ChatRoute): show Spinner if endpointsQuery or modelsQuery are still loading, which is apparent with slow fetching of models/remote config on first serve

* fix(useConversation): assign endpointType if it's missing

* fix(SaveAsPreset): pass real endpoint and endpointType when saving Preset)

* chore: recorganize types order for TConfig, add `iconURL`

* feat: custom endpoint icon support:
- use UnknownIcon in all icon contexts
- add mistral and openrouter as known endpoints, and add their icons
- iconURL support

* fix(presetSchema): move endpointType to default schema definitions shared between convoSchema and defaults

* refactor(Settings/OpenAI): remove legacy `isOpenAI` flag

* fix(OpenAIClient): do not invoke abortCompletion on completion error

* feat: add responseSender/label support for custom endpoints:
- use defaultModelLabel field in endpointOption
- add model defaults for custom endpoints in `getResponseSender`
- add `useGetSender` hook which uses EndpointsQuery to determine `defaultModelLabel`
- include defaultModelLabel from endpointConfig in custom endpoint client options
- pass `endpointType` to `getResponseSender`

* feat(OpenAIClient): use custom options from config file

* refactor: rename `defaultModelLabel` to `modelDisplayLabel`

* refactor(data-provider): separate concerns from `schemas` into `parsers`, `config`, and fix imports elsewhere

* feat: `iconURL` and extract environment variables from custom endpoint config values

* feat: custom config validation via zod schema, rename and move to `./projectRoot/librechat.yaml`

* docs: custom config docs and examples

* fix(OpenAIClient/mistral): mistral does not allow singular system message, also add `useChatCompletion` flag to use openai-node for title completions

* fix(custom/initializeClient): extract env var and use `isUserProvided` function

* Update librechat.example.yaml

* feat(InputWithLabel): add className props, and forwardRef

* fix(streamResponse): handle error edge case where either messages or convos query throws an error

* fix(useSSE): handle errorHandler edge cases where error response is and is not properly formatted from API, especially when a conversationId is not yet provided, which ensures stream is properly closed on error

* feat: user_provided keys for custom endpoints

* fix(config/endpointSchema): do not allow default endpoint values in custom endpoint `name`

* feat(loadConfigModels): extract env variables and optimize fetching models

* feat: support custom endpoint iconURL for messages and Nav

* feat(OpenAIClient): add/dropParams support

* docs: update docs with default params, add/dropParams, and notes to use config file instead of `OPENAI_REVERSE_PROXY`

* docs: update docs with additional notes

* feat(maxTokensMap): add mistral models (32k context)

* docs: update openrouter notes

* Update ai_setup.md

* docs(custom_config): add table of contents and fix note about custom name

* docs(custom_config): reorder ToC

* Update custom_config.md

* Add note about `max_tokens` field in custom_config.md

client/src/components/Chat/Menus/Endpoints/MenuItem.tsx

@@ -1,6 +1,7 @@
 import { useState } from 'react';
 import { Settings } from 'lucide-react';
 import { EModelEndpoint } from 'librechat-data-provider';
+import { useGetEndpointsQuery } from 'librechat-data-provider/react-query';
 import type { FC } from 'react';
 import { useLocalize, useUserKey } from '~/hooks';
 import { SetKeyDialog } from '~/components/Input/SetKeyDialog';
@@ -26,7 +27,8 @@ const MenuItem: FC<MenuItemProps> = ({
   userProvidesKey,
   ...rest
 }) => {
-  const Icon = icons[endpoint] ?? icons.unknown;
+  const { data: endpointsConfig } = useGetEndpointsQuery();
+
   const [isDialogOpen, setDialogOpen] = useState(false);
   const { newConversation } = useChatContext();
   const { getExpiry } = useUserKey(endpoint);
@@ -44,6 +46,10 @@ const MenuItem: FC<MenuItemProps> = ({
     }
   };
 
+  const endpointType = endpointsConfig?.[endpoint ?? '']?.type;
+  const iconKey = endpointType ? 'unknown' : endpoint ?? 'unknown';
+  const Icon = icons[iconKey];
+
   return (
     <>
       <div
@@ -56,7 +62,15 @@ const MenuItem: FC<MenuItemProps> = ({
         <div className="flex grow items-center justify-between gap-2">
           <div>
             <div className="flex items-center gap-2">
-              {<Icon size={18} className="icon-md shrink-0 dark:text-white" />}
+              {
+                <Icon
+                  size={18}
+                  endpoint={endpoint}
+                  context={'menu-item'}
+                  className="icon-md shrink-0 dark:text-white"
+                  iconURL={endpointsConfig?.[endpoint ?? '']?.iconURL}
+                />
+              }
               <div>
                 {title}
                 <div className="text-token-text-tertiary">{description}</div>
@@ -128,7 +142,13 @@ const MenuItem: FC<MenuItemProps> = ({
         </div>
       </div>
       {userProvidesKey && (
-        <SetKeyDialog open={isDialogOpen} onOpenChange={setDialogOpen} endpoint={endpoint} />
+        <SetKeyDialog
+          open={isDialogOpen}
+          endpoint={endpoint}
+          endpointType={endpointType}
+          onOpenChange={setDialogOpen}
+          userProvideURL={endpointsConfig?.[endpoint ?? '']?.userProvideURL}
+        />
       )}
     </>
   );