fix(professors, settings): add auto-migration for legacy professors, deep populate user in class/session/course services, and fix SMS bypass number persistence

components/settings/settingService.js

@@ -86,15 +86,16 @@ const toPublicTemplates = (storedMap, notificationMap = {}) => {
 const formatBypassNumbers = (list) => {
   if (!Array.isArray(list)) return [];
   return list.map((item) => {
-    const raw = item.toObject ? item.toObject() : item;
+    const raw = item && item.toObject ? item.toObject() : item;
+    if (!raw) return null;
     return {
-      _id: raw._id,
-      phoneNumber: raw.phoneNumber,
+      _id: raw._id ? String(raw._id) : undefined,
+      phoneNumber: raw.phoneNumber || '',
       label: raw.label || '',
       isActive: raw.isActive !== false,
       createdAt: raw.createdAt
     };
-  });
+  }).filter(Boolean);
 };
 
 const getSettings = async () => {
@@ -273,17 +274,20 @@ const saveSettings = async (body = {}) => {
       .map((item) => {
         const rawPhone = item.phoneNumber || item.phone;
         const normalized = normalizePhoneForBypass(rawPhone);
+        const validId = (item._id && mongoose.Types.ObjectId.isValid(String(item._id)))
+          ? new mongoose.Types.ObjectId(String(item._id))
+          : new mongoose.Types.ObjectId();
         return {
-          _id: item._id || undefined,
-          phoneNumber: normalized || rawPhone,
+          _id: validId,
+          phoneNumber: normalized || String(rawPhone || '').trim(),
           label: String(item.label || '').trim(),
           isActive: item.isActive !== false,
-          createdAt: item.createdAt || new Date()
+          createdAt: item.createdAt ? new Date(item.createdAt) : new Date()
         };
       })
       .filter((item) => item.phoneNumber && item.phoneNumber.length >= 10);
 
-    doc.set('smsBypassNumbers', nextBypass);
+    doc.smsBypassNumbers = nextBypass;
     doc.markModified('smsBypassNumbers');
   }
 

components/settings/smsBypass.test.js

@@ -2,6 +2,7 @@
 
 const test = require('node:test');
 const assert = require('node:assert/strict');
+const mongoose = require('mongoose');
 const { normalizePhoneForBypass } = require('./messagingFlags');
 
 test('SMS Bypass Numbers Utilities', async (t) => {