Add scheduled task automation skill with worker execution pipeline.

Introduce scheduled-task-automation for H5 and WeChat, persist tasks in h5_scheduled_tasks, and run due jobs via a dedicated worker that executes agent tasks and delivers results.

Co-authored-by: Cursor <cursoragent@cursor.com>

schedule-time.mjs

@@ -113,6 +113,56 @@ export function zonedTimeToEpochMs(parts, timezone = DEFAULT_TIMEZONE) {
   return guess;
 }
 
+export function nextWeeklyRunAt({
+  weekday,
+  hour,
+  minute = 0,
+  timezone = DEFAULT_TIMEZONE,
+  now = Date.now(),
+} = {}) {
+  const tz = normalizeTimezone(timezone);
+  const safeWeekday = Number(weekday);
+  if (!Number.isInteger(safeWeekday) || safeWeekday < 0 || safeWeekday > 6) {
+    throw new Error('weekly 任务需要 weekday（0=周日 … 6=周六）');
+  }
+  const todayStart = startOfLocalDay(now, tz);
+  const todayParts = getLocalParts(todayStart, tz);
+  const todayWeekday = new Date(
+    Date.UTC(todayParts.year, todayParts.month - 1, todayParts.day),
+  ).getUTCDay();
+
+  const dayOffset = (safeWeekday - todayWeekday + 7) % 7;
+  let candidateDayStart = addLocalDays(todayStart, dayOffset, tz);
+  let parts = getLocalParts(candidateDayStart, tz);
+  let runAt = zonedTimeToEpochMs(
+    {
+      year: parts.year,
+      month: parts.month,
+      day: parts.day,
+      hour: Number(hour),
+      minute: Number(minute),
+      second: 0,
+    },
+    tz,
+  );
+  if (runAt <= now) {
+    candidateDayStart = addLocalDays(candidateDayStart, 7, tz);
+    parts = getLocalParts(candidateDayStart, tz);
+    runAt = zonedTimeToEpochMs(
+      {
+        year: parts.year,
+        month: parts.month,
+        day: parts.day,
+        hour: Number(hour),
+        minute: Number(minute),
+        second: 0,
+      },
+      tz,
+    );
+  }
+  return runAt;
+}
+
 export function nextDailyRunAt({ hour, minute = 0, timezone = DEFAULT_TIMEZONE, now = Date.now() }) {
   const tz = normalizeTimezone(timezone);
   const todayStart = startOfLocalDay(now, tz);