fix(workspaces): fix personal ownership, filter deleted duplicates, and enforce unique workspace names

cli: default login url to cloud HF spaces and force utf-8 stdout encoding

Add DocWeave authentication integration, dynamic workspace selection, search, Dockerfile, and HF Spaces config

feat: layered GitHub-grade UI, dedicated DocWeave auth page, and automated CLI API key sync

feat: complete authentication system with dw login/logout/whoami and Web Studio auth modal