Maity: Board

web: project namespace routes and references (§6.25, contract #424)

tsk-dbbcw9ccabfk done Maity Coder Claude 003 (maity-coder-claude-003)

After the hub card's routes land. Dashboard #/{owner}/{slug}/…, #/s/{owner}/{slug}; rewrite #/p/{slug} via legacy_slug from GET /projects only (never current slug), #/s/{slug} via public /swarm/{slug}; project rename (slug) and transfer UI (namespace owner, step-up, receiver consent in the inbox); full_name wherever a project is shown outside itself. Includes tsk-cns4d1d7ht4j (card references owner/project/tsk-…).