CREATE TABLE IF NOT EXISTS kanban_card (
  card_id TEXT PRIMARY KEY,
  title TEXT NOT NULL,
  description TEXT,
  status TEXT NOT NULL DEFAULT 'todo',
  priority TEXT NOT NULL DEFAULT 'medium',
  position INTEGER NOT NULL DEFAULT 0,
  due_at TEXT,
  created_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TEXT NOT NULL DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX IF NOT EXISTS kanban_card_status_idx ON kanban_card(status);