- chat: left-aligned discord-style messages with grouped senders, hover actions, an auto-growing composer and file cards - send: render messages and files locally first and replace the placeholder when the worker publishes the real item; failures keep the text with a retry action - navigation: space rail plus a flatter channel list with the space name header and collapsible groups - members: right pane tabs (files / members) grouped by online, offline and pending users, with a prominent invite action and a top bar shortcut - notifications: toast host for invite results; invitees get a toast with an accept action, and the invitation payload now carries the space name and inviter inside the encrypted grant - users over devices: drop device names, the device list and device rename/release; senders show the account (guests show as guest) and the share panel only keeps links - follow contract 7.0.0 (max_members, members_used, members_full, /join) - docs: ui-design and frontend updated for the new layout and concepts