The comment thread renders read-only under the card's body (author line, Markdown body through CardBodyView, read-only paperclip rows), read outside the snapshot and re-read on every walk landing via BoardSession.snapshotGeneration. Add Comment posts through the Mac composer's own draft-then-rename bracket — seeding from the card's single synced draft so a thought started on the Mac finishes here — and each row's context menu opens the same sheet in edit mode. Both commit on their trailing button or not at all: the phone's transactional model, dirty-Cancel confirmation and swipe-dismiss disabled while dirty included. UI-tested end to end with disk assertions.
Claude-Session: https://claude.ai/code/session_01SR4XGjmBE16ZUYWpfFHXwY
