Release 2.22.0: normalize playlist schedules and unify player sync

test/playlist-form-view-model.test.js

@@ -62,6 +62,8 @@ test('playlist schedule summaries show up to two short rules on separate lines a
     [[{ days: [1] }, { days: [2] }, { days: [3] }, { days: [4] }], '4 rules'],
     [[{ start_datetime: '2026-10-25T09:00', end_datetime: '2026-10-26T17:00', days: [1] }],
       'Rule 1: Dates 2026-10-25 09:00 to 2026-10-26 17:00: Mon'],
+    [[{ start_datetime: '2026-10-25T09:00' }], 'Rule 1: From 2026-10-25 09:00'],
+    [[{ end_datetime: '2026-10-26T17:00' }], 'Rule 1: Until 2026-10-26 17:00'],
     [[{ start_datetime: new Date(2026, 0, 1, 0, 0), end_datetime: new Date(2026, 9, 30, 20, 0) }],
       'Rule 1: Dates 2026-01-01 00:00 to 2026-10-30 20:00'],
     [[{ start_datetime: '2026-10-25T09:00', end_datetime: '2026-10-26T17:00',
@@ -91,6 +93,36 @@ test('playlist schedule summaries show up to two short rules on separate lines a
   assert.match(css, /\.playlist-schedule-summary \.chip\s*\{[^}]*display:\s*inline-block;[^}]*white-space:\s*pre-line;[^}]*overflow-wrap:\s*anywhere;/);
 });
 
+test('live schedule validator accepts one datetime bound and still rejects reversed ranges', () => {
+  const fs = require('node:fs');
+  const path = require('node:path');
+  const vm = require('node:vm');
+  const source = fs.readFileSync(path.join(__dirname, '../src/web/public/js/playlists/playlist-schedule.js'), 'utf8');
+  const start = source.lastIndexOf('    function validateScheduleRuleCard(card)');
+  const end = source.indexOf('    function updateLiveRuleValidity(card)', start);
+  const fields = {
+    days: [],
+    startDatetime: { value: '2026-10-25T09:00' },
+    endDatetime: { value: '' },
+    startTime: { value: '' },
+    endTime: { value: '' }
+  };
+  const context = {
+    getRuleFields: () => fields,
+    getRuleDayLabels: () => [],
+    getDateRangeDayIndices: () => [0, 1, 2, 3, 4, 5, 6],
+    clearRuleValidity() {},
+    setRuleError() {},
+    setDayInputError() {},
+    hasScheduleRuleOverlap: () => true
+  };
+  vm.runInNewContext(source.slice(start, end) + '\nglobalThis.validateRule = validateScheduleRuleCard;', context);
+
+  assert.equal(context.validateRule({}), true);
+  fields.endDatetime.value = '2026-10-24T09:00';
+  assert.equal(context.validateRule({}), false);
+});
+
 test('playlist rows show mute controls for RTMP slides', () => {
   const model = buildPlaylistFormViewModel(
     { id: 22, name: 'Playlist 22' },