🚀 feat: Add Code API Proxy Support and Update MCP SDK (#6203)

* chore: bump mcp sdk

* feat: Add proxy support for file download and upload in Code Environment CRUD operations

* chore: remove unused files

* chore: change output format from CommonJS to ES module in server rollup config

Author: danny-avila

api/server/services/Files/Code/crud.js

@@ -1,4 +1,3 @@
-// Code Files
 const axios = require('axios');
 const FormData = require('form-data');
 const { getCodeBaseURL } = require('@librechat/agents');
@@ -16,7 +15,8 @@ const MAX_FILE_SIZE = 150 * 1024 * 1024;
 async function getCodeOutputDownloadStream(fileIdentifier, apiKey) {
   try {
     const baseURL = getCodeBaseURL();
-    const response = await axios({
+    /** @type {import('axios').AxiosRequestConfig} */
+    const options = {
       method: 'get',
       url: `${baseURL}/download/${fileIdentifier}`,
       responseType: 'stream',
@@ -25,10 +25,22 @@ async function getCodeOutputDownloadStream(fileIdentifier, apiKey) {
         'X-API-Key': apiKey,
       },
       timeout: 15000,
-    });
+    };
+
+    if (process.env.PROXY) {
+      options.proxy = {
+        host: process.env.PROXY,
+        protocol: process.env.PROXY.startsWith('https') ? 'https' : 'http',
+      };
+    }
 
+    const response = await axios(options);
     return response;
   } catch (error) {
+    logAxiosError({
+      message: `Error downloading code environment file stream: ${error.message}`,
+      error,
+    });
     throw new Error(`Error downloading file: ${error.message}`);
   }
 }
@@ -54,7 +66,8 @@ async function uploadCodeEnvFile({ req, stream, filename, apiKey, entity_id = ''
     form.append('file', stream, filename);
 
     const baseURL = getCodeBaseURL();
-    const response = await axios.post(`${baseURL}/upload`, form, {
+    /** @type {import('axios').AxiosRequestConfig} */
+    const options = {
       headers: {
         ...form.getHeaders(),
         'Content-Type': 'multipart/form-data',
@@ -64,7 +77,16 @@ async function uploadCodeEnvFile({ req, stream, filename, apiKey, entity_id = ''
       },
       maxContentLength: MAX_FILE_SIZE,
       maxBodyLength: MAX_FILE_SIZE,
-    });
+    };
+
+    if (process.env.PROXY) {
+      options.proxy = {
+        host: process.env.PROXY,
+        protocol: process.env.PROXY.startsWith('https') ? 'https' : 'http',
+      };
+    }
+
+    const response = await axios.post(`${baseURL}/upload`, form, options);
 
     /** @type {{ message: string; session_id: string; files: Array<{ fileId: string; filename: string }> }} */
     const result = response.data;