Lightweight card system for notes, ideas, tasks, references, and quotes
within SharedSpaces. Supports markdown body, tags, media attachments (M2M),
position ordering, and type filtering. REST API at /api/v1/cards/ with
full CRUD. Phase 2 stub for Docmost collaborative editing.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Jeff Emmett