🚀 feat: Enhance Model Handling, Logging & xAI Agent Support (#6182)

* chore: update @librechat/agents to version 2.1.9

* feat: xAI standalone provider for agents

* chore: bump librechat-data-provider version to 0.7.6997

* fix: reorder import statements and enhance user listing output

* fix: Update Docker Compose commands to support v2 syntax with fallback

* 🔧 fix: drop `reasoning_effort` for o1-preview/mini models

* chore: requireLocalAuth logging

* fix: edge case artifact message editing logic to handle `new` conversation IDs

* fix: remove `temperature` from model options in OpenAIClient if o1-mini/preview

* fix: update type annotation for fetchPromisesMap to use Promise<string[]> instead of string[]

* feat: anthropic model fetching

* fix: update model name to use EModelEndpoint.openAI in fetchModels and fetchOpenAIModels

* fix: add error handling to modelController for loadModels

* fix: add error handling and logging for model fetching in loadDefaultModels

* ci: update getAnthropicModels tests to be asynchronous

* feat: add user ID to model options in OpenAI and custom endpoint initialization

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Co-authored-by: Andrei Berceanu <andreicberceanu@gmail.com>
Co-authored-by: KiGamji <maloyh44@gmail.com>

api/server/services/Endpoints/agents/initialize.js

@@ -22,6 +22,7 @@ const { getAgent } = require('~/models/Agent');
 const { logger } = require('~/config');
 
 const providerConfigMap = {
+  [Providers.XAI]: initCustom,
   [Providers.OLLAMA]: initCustom,
   [Providers.DEEPSEEK]: initCustom,
   [Providers.OPENROUTER]: initCustom,