feat(schedule): 待办提醒推送、行事历仅展示提醒与管理 API

单次提醒 worker 投递、local 时间写入校验、未来 7 天提醒列表与忽略/批量删除；行事历去掉事项重复展示。

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

schedule-reminder-worker.mjs

@@ -17,6 +17,50 @@ export function startScheduleReminderWorker({
     if (running || stopped) return;
     running = true;
     try {
+      const dueReminders = await scheduleService.listDueReminders({ limit: 50 });
+      for (const candidate of dueReminders) {
+        const reminder = await scheduleService.lockReminder(candidate.id);
+        if (!reminder) continue;
+        try {
+          const text = await scheduleService.buildReminderText(reminder);
+          if (!text) {
+            await scheduleService.markReminderCancelled(reminder, '事项已失效或不存在');
+            continue;
+          }
+          await scheduleService.createUserNotification?.({
+            userId: reminder.userId,
+            channel: 'web',
+            notificationType: 'schedule_reminder',
+            title: '待办提醒',
+            body: text,
+            data: {
+              reminderId: reminder.id,
+              itemId: reminder.itemId,
+            },
+          });
+          if (reminder.channel === 'wechat') {
+            await sendWechatTextToUser(reminder.userId, text);
+          }
+          await scheduleService.logDelivery({
+            reminderId: reminder.id,
+            userId: reminder.userId,
+            channel: reminder.channel,
+            status: 'success',
+          });
+          await scheduleService.markReminderSent(reminder);
+        } catch (err) {
+          logger.warn?.('Schedule reminder delivery failed:', err);
+          await scheduleService.logDelivery({
+            reminderId: reminder.id,
+            userId: reminder.userId,
+            channel: reminder.channel,
+            status: 'failed',
+            errorMessage: err instanceof Error ? err.message : String(err),
+          }).catch(() => {});
+          await scheduleService.markReminderFailed(reminder, err, { maxAttempts });
+        }
+      }
+
       const due = await scheduleService.listDueDigestSubscriptions({ limit: 50 });
       for (const candidate of due) {
         const subscription = await scheduleService.lockDigestSubscription(candidate.id);