Show or hide a slide only at certain times, days or dates (e.g. show until 6 January)

Replaces a slide's own visibility rule, e.g. "only show the breakfast menu before 11", "show until 6 January" (..2027-01-06), "only during December" (2026-12-01..2026-12-31), or "hide the Christmas slide after December 26" (2026-12-27..). Never promise to delete later — set a date condition instead. Each condition is a type and value: time 08:00-11:00, weekday Monday,Tuesday, date 2026-12-01..2026-12-24 (inclusive; either end may be left open, e.g. 2026-12-27.. or ..2027-01-06), or data_trigger {sourceId}, {sourceId}:empty or {sourceId}:contains:{text}. mode: show (default, show only while the conditions hold) or hide (hide while they hold). match: all (default) or any. An empty list clears the rule. Rules set on the web page appear on the slide as rules with readOnly: true and are not changed by this call.