Remove synthetic map-based entity and fetch mapper unit tests; cover all
menu subjects and preview pipelines via integration tests against the real
Workspace API. Handle draft mail without subjects in list mapping.
Co-authored-by: Cursor <cursoragent@cursor.com>
Introduce the office Bubble Tea browser (module tree, multi-select lists,
markdown preview) alongside oo, with cmd/internal/bootstrap for shared auth,
unit tests across preview/model/ui/fetch, CI build for both binaries, and
GoReleaser archives for office.
Co-authored-by: Cursor <cursoragent@cursor.com>