## Summary
Adds tests that simulate the execution flow and output feed
## Changes
- **What**:
- Add ExecutionHelper for mocking network activity
- Refactor ws fixture to use Playwright websocket helper instead of
patching window
-
## Review Focus
<!-- Critical design decisions or edge cases that need attention -->
<!-- If this PR fixes an issue, uncomment and update the line below -->
<!-- Fixes #ISSUE_NUMBER -->
## Screenshots (if applicable)
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┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-10801-test-App-mode-Execution-tests-3356d73d365081e4acf0c34378600031)
by [Unito](https://www.unito.io)
