feat: add multi-chat routing and bill-specific dashboard countdown

tests/test_clients.py

@@ -70,10 +70,10 @@ def test_saapa_rejects_oversized_or_duplicate_snapshot() -> None:
 
 def test_eitaa_requires_ok_response() -> None:
     session = FakeSession(FakeResponse({"ok": False, "description": "denied"}))
-    client = EitaaClient("token", "chat", timeout=2, session=session)  # type: ignore[arg-type]
+    client = EitaaClient("token", timeout=2, session=session)  # type: ignore[arg-type]
 
     with pytest.raises(ExternalServiceError, match="denied"):
-        client.send("message")
+        client.send("chat", "message")
 
     _, url, kwargs = session.calls[0]
     assert url.endswith("/token/sendMessage")