Schedule pages and rotation rules can be skipped in slow mode

Each page in a schedule block, and each rule that adds its page to the
rotation, has a "skip in slow mode" checkbox. While slow mode is on those
pages are left out of the rotation; when none of the block's pages are
left, the chosen page is shown. The rotation keeps its own timers.

Schedule format version 5; version 4 is converted when read and stored
again in version 5 on the next save.

Version 2.18.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/esp32/logic/page_selector.cpp

@@ -131,15 +131,16 @@ PageChoice PageSelector::update(int minute, uint32_t now)
 			const ScheduleBlock &b = _schedule->blocks[_block];
 			effect = b.effect;
 			for (int i = 0; i < b.item_count; i++)
-				items[count++] = {b.items[i].page, b.items[i].seconds * 1000UL, ShowReason::Schedule, -1};
+				if (!_slow || !b.items[i].skip_slow_mode)
+					items[count++] = {b.items[i].page, b.items[i].seconds * 1000UL, ShowReason::Schedule, -1};
 		}
-		else
+		if (count == 0) // no schedule, a manual pick, or slow mode skips all the block's pages
 			items[count++] = {_chosen, CHOSEN_PAGE_SECONDS * 1000UL, ShowReason::Chosen, -1};
 		for (int i = 0; i < rule_count; i++)
 		{
 			const TriggerRule &r = _schedule->rules[i];
 			if (r.mode == TriggerMode::AddToRotation && _rule_active[i] && ruleInBlock(r, _block) &&
-				(r.over_manual || !_picked))
+				(r.over_manual || !_picked) && (!_slow || !r.skip_slow_mode))
 				items[count++] = {r.page, r.seconds * 1000UL, ShowReason::Rotation, i};
 		}