feat: streaming + multi-turn + view source + doc-scoped + UX fixes

revert: restore Twilight Atelier (drop Risograph Folio)

redesign: Risograph Folio — printed-publication aesthetic

redesign: Twilight Atelier — full chat-app shell

Remove claude-mem CLAUDE.md noise from deployed Space

Deploy: 2026-05-04T11:20:23Z