feat(support): filter active rooms with messages and clean up rooms of deleted users

- Delete associated SupportRoom on User.soft_delete()
- Add cleanup_deleted_or_inactive_support_rooms to purge inactive/soft-deleted users' rooms
- Filter admin rooms list and total unread counter to active users with messages only
- Apply active_support_rooms_queryset filter to room retrieval and reply endpoints

apps/account/models/user.py

@@ -100,6 +100,9 @@ class User(AbstractUser):
         return f"{username}"
 
     def soft_delete(self):
+        from apps.support.models import SupportRoom
+
+        SupportRoom.objects.filter(user=self).delete()
         self.deleted_at = timezone.now()
         self.is_active = False
         self.fullname = f'{self.fullname}:deleted'

apps/support/views.py

@@ -40,8 +40,45 @@ class IsSupportAdminPanelUser(BasePermission):
         return getattr(user, 'user_type', None) in ('super_admin', 'admin', 'professor', 'consultant')
 
 
+def cleanup_deleted_or_inactive_support_rooms() -> None:
+    """
+    Deletes SupportRooms belonging to users who have been soft-deleted or deactivated.
+    """
+    SupportRoom.objects.filter(
+        Q(user__is_active=False)
+        | Q(user__deleted_at__isnull=False)
+        | Q(user__fullname__endswith=':deleted')
+    ).delete()
+
+
+def active_support_rooms_queryset():
+    """
+    Returns SupportRooms belonging only to active, non-deleted users (including active guest users)
+    that have at least one message.
+    """
+    cleanup_deleted_or_inactive_support_rooms()
+    return (
+        SupportRoom.objects.filter(
+            user__is_active=True,
+            user__deleted_at__isnull=True,
+            messages__isnull=False,
+        )
+        .exclude(user__fullname__endswith=':deleted')
+        .distinct()
+    )
+
+
 def get_total_admin_unread_count() -> int:
-    agg = SupportRoom.objects.aggregate(total=Sum('unread_by_admin'))
+    agg = (
+        SupportRoom.objects.filter(
+            user__is_active=True,
+            user__deleted_at__isnull=True,
+            messages__isnull=False,
+        )
+        .exclude(user__fullname__endswith=':deleted')
+        .distinct()
+        .aggregate(total=Sum('unread_by_admin'))
+    )
     return int(agg.get('total') or 0)
 
 
@@ -191,7 +228,7 @@ class AdminSupportRoomListView(APIView):
 
         search = (request.query_params.get('search') or '').strip()
 
-        qs = SupportRoom.objects.select_related('user', 'assigned_to').order_by(
+        qs = active_support_rooms_queryset().select_related('user', 'assigned_to').order_by(
             '-last_message_at',
             '-updated_at',
             '-id',
@@ -302,7 +339,7 @@ class AdminSupportRoomMessagesView(APIView):
 
     def get(self, request, room_id: int, *args, **kwargs):
         room = get_object_or_404(
-            SupportRoom.objects.select_related('user', 'assigned_to'),
+            active_support_rooms_queryset().select_related('user', 'assigned_to'),
             pk=room_id,
         )
 
@@ -357,7 +394,7 @@ class AdminSupportRoomMessagesView(APIView):
     @transaction.atomic
     def post(self, request, room_id: int, *args, **kwargs):
         room = get_object_or_404(
-            SupportRoom.objects.select_related('user', 'assigned_to'),
+            active_support_rooms_queryset().select_related('user', 'assigned_to'),
             pk=room_id,
         )
         serializer = SendSupportMessageSerializer(data=request.data)