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.

components/classes/classService.js

@@ -3,9 +3,11 @@
 
 const Class = require('./classModel');
 const User = require('../users/userModel');
+const Session = require('../sessions/sessionModel');
 const AppError = require('../../utils/AppError');
 const { calculateMeta, escapeRegex, getSearchTerm } = require('../../utils/pagination');
 const { sendClassRegisteredSms } = require('../../utils/senders/smsMessages');
+const { buildClassScheduleContext } = require('../../utils/classSchedule');
 const logger = require('../../utils/logger');
 
 const getAll = async (query) => {
@@ -77,12 +79,20 @@ const registerUsers = async (classId, userIds) => {
   await cls.save();
 
   const classLabel = cls.name || cls.course?.title || 'کلاس';
+  const sessions = await Session.find({ class: classId })
+    .select('day startTime endTime')
+    .sort({ day: 1 })
+    .lean();
+  const schedule = buildClassScheduleContext(cls, sessions);
   const users = await User.find({ _id: { $in: toAdd } }).select('phoneNumber').lean();
   await Promise.all(
     users.map(async (user) => {
       if (!user.phoneNumber) return;
       try {
-        await sendClassRegisteredSms(user.phoneNumber, classLabel, user._id);
+        await sendClassRegisteredSms(user.phoneNumber, classLabel, user._id, {
+          courseName: cls.course?.title || classLabel,
+          ...schedule
+        });
       } catch (err) {
         logger.error(`[registerUsers] SMS failed for ${user.phoneNumber}: ${err.message}`);
       }