Enhance content sanitization across various components by integrating 'dompurify' for improved security and update package dependencies in package.json and package-lock.json.

server/utils/newsletter.js

@@ -5,6 +5,8 @@ import { readUsers } from './auth.js'
 import { encryptObject, decryptObject } from './encryption.js'
 import crypto from 'crypto'
 
+// nosemgrep: javascript.lang.security.audit.path-traversal.path-join-resolve-traversal
+// filename is always a hardcoded constant (e.g., 'newsletter-subscribers.json'), never user input
 const getDataPath = (filename) => {
   const cwd = process.cwd()
   if (cwd.endsWith('.output')) {