Security review: staff admin lockdown, unicode-safe login/phone/grade inputs, demo guest not upgradable, home cache not floodable

- accounts admin: phone/is_guest read-only for non-superusers, device_id filter lookups refused,
  auth.User/Group admin writable only by superusers
- campaigns: delivery log needs view permission
- phone/OTP/birth date: any Unicode digit normalised or rejected with 400; unknown gradeId is 400
- shared demo guest is never turned into a person's account by logging in
- /api/home with unknown gradeId is no longer cached (LocMemCache flood reset throttle counters)
- /api/progress/nodes: one query, huge unit is 400
- BazaarCredential token filter lookups refused

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

campaigns/tests_security_review.py

@@ -0,0 +1,30 @@
+"""
+حفاظ‌های بازبینیِ امنیتی (کمپین‌ها در پنل).
+"""
+from django.contrib.auth import get_user_model
+from django.contrib.auth.models import Permission
+from django.test import TestCase
+
+from .models import CampaignDelivery, MessageCampaign
+
+
+class CampaignDeliveryNeedsViewPermissionTests(TestCase):
+    """لاگِ تحویلِ کمپین (user_id، متنِ خطای ارسال) فقط با view_campaigndelivery دیده می‌شود، نه برای هر کارمند."""
+
+    def setUp(self):
+        campaign = MessageCampaign.objects.create(title='t', body='b', channel='sms')
+        self.delivery = CampaignDelivery.objects.create(campaign=campaign, user_id=5, channel='sms',
+                                                        status='failed', error_message='e')
+        self.staff = get_user_model().objects.create_user('st', 'st@example.com', 'pw-for-tests-only', is_staff=True)
+        self.client.force_login(self.staff)
+
+    def test_staff_without_permission_gets_403(self):
+        self.assertEqual(self.client.get('/admin/campaigns/campaigndelivery/').status_code, 403)
+        self.assertEqual(
+            self.client.get(f'/admin/campaigns/campaigndelivery/{self.delivery.pk}/change/').status_code, 403)
+
+    def test_view_permission_still_read_only(self):
+        self.staff.user_permissions.add(
+            Permission.objects.get(content_type__app_label='campaigns', codename='view_campaigndelivery'))
+        self.assertEqual(self.client.get('/admin/campaigns/campaigndelivery/').status_code, 200)
+        self.assertEqual(self.client.get('/admin/campaigns/campaigndelivery/add/').status_code, 403)