feat: add confluence/slack search tools, chat history, cloud Qdrant support, sync trigger fixes

fix: update user roles to include 'org_admin' in Sidebar and UserInvite types

fix: type errors, merge OAuth branch, upgrade BM25Store

User Settings (/settings) — 3 tabs:

feat: enhance UI state management with graph collapse functionality and improve error handling in API requests

feat: implement sidebar component with navigation and recent queries

feat: add Zustand stores for filters and UI state management