🧠 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/ModelService.js

@@ -1,4 +1,5 @@
 const axios = require('axios');
+const { Providers } = require('@librechat/agents');
 const { HttpsProxyAgent } = require('https-proxy-agent');
 const { EModelEndpoint, defaultModels, CacheKeys } = require('librechat-data-provider');
 const { inputSchema, logAxiosError, extractBaseURL, processModelData } = require('~/utils');
@@ -57,7 +58,7 @@ const fetchModels = async ({
     return models;
   }
 
-  if (name && name.toLowerCase().startsWith('ollama')) {
+  if (name && name.toLowerCase().startsWith(Providers.OLLAMA)) {
     return await OllamaClient.fetchModels(baseURL);
   }