Improvements and Tests

[john0isaac]

Purpose

This PR sets up two test clients one with the database and one without. It also adds data classes for the response that follows the Microsoft Chat Protocol and improves the typing. It also adds tests for the frontend routes with 100% coverage.

Does this introduce a breaking change?

[ ] Yes
[x] No

Type of change

[ ] Bugfix
[ ] Feature
[x] Code style update (formatting, local variables)
[x] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

Code quality checklist

See CONTRIBUTING.md for more details.

• [x] The current tests all pass (python -m pytest).
• [x] I added tests that prove my fix is effective or that my feature works
• [x] I ran python -m pytest --cov to verify 100% coverage of added lines
• [x] I ran python -m mypy to check for type errors
• [x] I either used the pre-commit hooks or ran ruff manually on my code.