Add user-configurable sidebar and initial workflow/environment features across backend, frontend, and docs.
Backend: store sidebar_config on User (JSON column), add get_sidebar_config / set_sidebar_config helpers, include sidebar_config in user.to_dict(), and validate/update sidebar_config in the update_current_user API (preset and hiddenItems validation).
Frontend: refactor Sidebar to compute visible items via a shared sidebarItems module and memoized grouping/rendering; add settings UI and sidebarItems (new components) and update settings styles to support sidebar configuration.
Docs & README: update README and ARCHITECTURE to document Workflow Builder, Environment Pipeline, and other new/renamed features; bump roadmap versions and reorder/expand roadmap phases to reflect Visual Designer, Automation Engine, pipeline, and monitoring work.
Overall: wires up end-to-end support for customizable sidebar preferences, surfaces them via API, and updates UI + documentation to reflect new automation and pipeline features.
Redesigned the README with improved layout, badges, architecture overview, and updated quick start instructions. Added a comprehensive docs/ARCHITECTURE.md file detailing system design, request flow, template system, port allocation, database linking, file paths, and troubleshooting.
Juan Denis