fix: improve maintenance and synchronize live conversations

backend/tests/channels/test_slack_adapter.py

@@ -207,7 +207,7 @@ class TestSlackProfileAndTyping:
 
     @pytest.mark.asyncio
     async def test_typing_placeholder_then_edit(self, adapter, monkeypatch):
-        from unittest.mock import AsyncMock, MagicMock
+        from unittest.mock import MagicMock
         import app.channels.slack as slk
         acc = MagicMock(); acc.id = "acc1"
         conv = MagicMock(external_conversation_id="D7")