## Summary

<!-- What does this change, and why? -->

## How was it tested?

<!-- Commands run, manual checks, screenshots for UI changes. -->

## Checklist

- [ ] `uv run ruff format .` and `uv run ruff check .` pass
- [ ] `uv run pytest` passes
- [ ] No secrets, API keys, or private/user data added (see [SECURITY.md](../SECURITY.md))
- [ ] Frontend user-facing text has no em-dashes (see [AGENTS.md](../AGENTS.md))
- [ ] Updated docs (AGENTS.md / etc.) if behavior or structure changed