Deleted the obsolete build workflow for BetterDesk and made adjustments to the CI configurations across multiple workflows. This includes changing permissions from write to read in the release-client and secret-scan workflows, updating the Node.js setup in the web-nodejs CI, and enhancing the rate limiting for RdClient pages. Additionally, improved the handling of return URLs in the auth middleware and added new utility functions for better security and logging.
- Introduced email notifications for help requests, allowing operators assigned to device folders or groups to receive alerts.
- Moved SMTP configuration to **Settings → Email**, including options for host, credentials, and alert email.
- Updated console layout for better usability and removed legacy SMTP automation tab.
- Added `nodemailer` as a dependency for email handling.
Add a new betterdesk-server Go codebase (server, api, auth, db, relay, signal, metrics, audit, ratelimit, proto, tools, tests) and related deployment/migration scripts. Add a comprehensive SECURITY_AUDIT_2026-03-01 report and .gitattributes; update copilot-instructions (ALL-IN-ONE v2.4.0), README, VERSION, Dockerfiles, scripts, docker-compose and entrypoint. Large updates to web-nodejs (translations, routes, services, frontend assets and middleware) and numerous new utilities; remove legacy Flask web files and archive hbbs-patch-v2 artifacts. Prepares repository for PostgreSQL support, DB migration tooling and the new Go server as the production backend.