Update README "What's New" section with v2.41.0 highlights organized by
category: new features (web interface, doctor lifecycle), data loss
prevention (7 critical fixes), auto-mode stability, roadmap parser
improvements, state/git fixes, Windows/platform support, and DX.
- Add web-interface.md documenting the new browser-based UI
- Add web interface entry to docs/README.md index
- Move v2.39-v2.40 highlights to "Previous highlights" section
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
