fix: buggy active chapter detection in chapters menu

closes #226

scripts/uosc.lua

@@ -4380,21 +4380,18 @@ mp.add_key_binding(nil, 'chapters', create_self_updating_menu_opener({
 	list_serializer = function(_, chapters)
 		local items = {}
 		chapters = normalize_chapters(chapters)
-		local active_found = false
-
-		for index, chapter in ipairs(chapters) do
+		for _, chapter in ipairs(chapters) do
 			local item = {
 				title = chapter.title or '',
 				hint = mp.format_time(chapter.time),
 				value = chapter.time,
 			}
 			items[#items + 1] = item
-			if active_found == false then
-				local is_active = chapter.time >= state.time
-				if is_active then
-					item.active = true
-					active_found = true
-				end
+		end
+		for index = #items, 1, -1 do
+			if state.time >= items[index].value then
+				items[index].active = true
+				break
 			end
 		end
 		return items