test: update gemini model to 1.5-flash in integration tests

Fix frontend build crash by updating getNodes to getUserAccessibleNodes and restore production service sync

fix: Format Swarm Control Thought Trace neatly using Tailwind Typography

refactor: re-org frontend folder structure to simply be 'frontend' ...

- Moved ui/client-app to frontend/

- Updated README and documentation references

- Updated docker-compose, local run scripts, and remote deploy scripts to point to new frontend location