🧠 feat: Reasoning UI for Agents (#5904)

* chore: bump https-proxy-agent and @librechat/agents

* refactor: Improve error logging in OllamaClient for API fetch failures

* feat: Add DeepSeek provider support and enhance provider name handling

* refactor: Use Providers.OLLAMA constant for model name check in fetchModels function

* feat: Enhance formatAgentMessages to handle reasoning content type

* feat: OpenRouter Agent Reasoning

* hard work and dedicationgit add .env.example :)

* fix: Handle Google social login with missing last name

Social login with Google was previously displaying 'undefined' when
a user's last name was empty or not provided.

Changes:
- Conditionally render last name only if it exists
- Prevent displaying 'undefined' when last name is missing

* fix: add missing file endings for developers yml,yaml and log

---------

Co-authored-by: Mohamed Al-Duraji <mbalduraji@college.harvard.edu>
Co-authored-by: Deepak Kendole <deepakdpk101@gmail.com>
Co-authored-by: Peter Rothlaender <peter.rothlaender@ginkgo.com>

api/server/services/Endpoints/openAI/llm.js

@@ -1,4 +1,5 @@
 const { HttpsProxyAgent } = require('https-proxy-agent');
+const { KnownEndpoints } = require('librechat-data-provider');
 const { sanitizeModelName, constructAzureURL } = require('~/utils');
 const { isEnabled } = require('~/server/utils');
 
@@ -57,10 +58,9 @@ function getLLMConfig(apiKey, options = {}) {
 
   /** @type {OpenAIClientOptions['configuration']} */
   const configOptions = {};
-
-  // Handle OpenRouter or custom reverse proxy
-  if (useOpenRouter || reverseProxyUrl === 'https://openrouter.ai/api/v1') {
-    configOptions.baseURL = 'https://openrouter.ai/api/v1';
+  if (useOpenRouter || reverseProxyUrl.includes(KnownEndpoints.openrouter)) {
+    llmConfig.include_reasoning = true;
+    configOptions.baseURL = reverseProxyUrl;
     configOptions.defaultHeaders = Object.assign(
       {
         'HTTP-Referer': 'https://librechat.ai',