refactor: unify skills+cli runtime and streamline ag-ui flow

backend/tests/unit/v1/schedule_items/test_subscription.py

@@ -3,7 +3,7 @@ from unittest.mock import AsyncMock, MagicMock
 from uuid import UUID, uuid4
 
 import pytest
-from fastapi import HTTPException
+from core.http.errors import ApiProblemError
 
 from core.auth.models import CurrentUser
 from models.inbox_messages import InboxMessage, InboxMessageStatus
@@ -132,7 +132,7 @@ async def test_accept_subscription_not_found(
         inbox_repository=FakeInboxRepo(None),
     )
 
-    with pytest.raises(HTTPException) as exc_info:
+    with pytest.raises(ApiProblemError) as exc_info:
         await service.accept_subscription(item_id)
 
     assert exc_info.value.status_code == 404
@@ -177,7 +177,7 @@ async def test_reject_subscription_not_found(
         inbox_repository=FakeInboxRepo(None),
     )
 
-    with pytest.raises(HTTPException) as exc_info:
+    with pytest.raises(ApiProblemError) as exc_info:
         await service.reject_subscription(item_id)
 
     assert exc_info.value.status_code == 404