Replace the raw Collabora setup log with a simple Office setup progress state, redesign the Office dashboard around document cards with lightweight previews, and keep backend WOPI sessions aligned with visible Office tabs. Also preserve the restored Office canvas surface across window refreshes and add regression coverage for the new behavior.
Track open Office sessions as tabs so Docs, Sheets, and Slides can switch between files without losing the active editor context.
Add backend support to list and close WOPI sessions, revoking tokens and locks when a tab closes.
Show open-file metadata in the Office start view and keep the mobile canvas rail reachable after closing the canvas.
