CREATE TABLE favorites (
    id          UUID        PRIMARY KEY DEFAULT gen_random_uuid(),
    user_id     UUID        NOT NULL REFERENCES users(id) ON DELETE CASCADE,
    folder_id   UUID        NOT NULL REFERENCES folders(id) ON DELETE CASCADE,
    position    INTEGER     NOT NULL DEFAULT 0,
    is_expanded BOOLEAN     NOT NULL DEFAULT false,
    created_at  TIMESTAMPTZ NOT NULL DEFAULT NOW(),
    UNIQUE (user_id, folder_id)
);

CREATE INDEX idx_favorites_user ON favorites(user_id);