docs: add Kanban, Claude Code, Chat Sharing wiki pages; update existing New pages: - Kanban.md — task board with Gantt roadmap, dependencies, checklists - Claude-Code.md — WebSocket CLI terminal documentation - Chat-Sharing.md — session sharing between users - Deployment-Profiles.md, Response-Pipeline.md — missing pages from sidebar Updated pages: - Wiki-RAG.md — knowledge collections, per-instance RAG config - Settings.md — deployment modes section - Chat.md — pinning details, source filtering - Widget.md — RAG config section - Home.md — new features in feature list and navigation table - _Sidebar.md — links to new pages Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>