feat(sms): send class start date, days, and course time

Expose schedule fields on class and invoice templates so SMS can include Jalali start date, weekdays, and hour range.

jobs/classReminderJob.js

@@ -5,6 +5,7 @@ const cron = require('node-cron');
 const Session = require('../components/sessions/sessionModel');
 const User = require('../components/users/userModel');
 const { sendClassReminderSms } = require('../utils/senders/smsMessages');
+const { buildClassScheduleContext } = require('../utils/classSchedule');
 const logger = require('../utils/logger');
 
 const parseStartDateTime = (session) => {
@@ -36,7 +37,7 @@ const runClassReminderJob = async () => {
       reminderSentAt: null,
       day: { $gte: dayFrom, $lte: dayTo },
     })
-      .populate({ path: 'class', select: 'name students' })
+      .populate({ path: 'class', select: 'name students startDate' })
       .populate({ path: 'course', select: 'title' })
       .lean();
 
@@ -54,6 +55,10 @@ const runClassReminderJob = async () => {
       const classLabel = classDoc?.name || session.course?.title || 'کلاس';
       const timeLabel = session.startTime;
       const placeLabel = session.place || '-';
+      const classSessions = classDoc?._id
+        ? await Session.find({ class: classDoc._id }).select('day startTime endTime').sort({ day: 1 }).lean()
+        : [];
+      const schedule = buildClassScheduleContext(classDoc, classSessions, session);
 
       const users = await User.find({ _id: { $in: studentIds } }).select('phoneNumber').lean();
       await Promise.all(
@@ -65,7 +70,11 @@ const runClassReminderJob = async () => {
               classLabel,
               timeLabel,
               placeLabel,
-              user._id
+              user._id,
+              {
+                courseName: session.course?.title || classLabel,
+                ...schedule
+              }
             );
           } catch (err) {
             logger.error(`[ClassReminderJob] SMS failed for ${user.phoneNumber}: ${err.message}`);