Add root '/' redirect to /app and corresponding test

[mrauter1]

Motivation

• Ensure requests to the site root redirect browsers to the single-page app at /app for a smoother entry point.

Description

• Add a GET handler for / in app/main.py that returns RedirectResponse("/app", status_code=status.HTTP_302_FOUND) and import status and RedirectResponse.
• Add a unit test test_root_route_redirects_to_app in tests/test_auth_requester.py to validate the redirect.

Testing

• Added tests/test_auth_requester.py::test_root_route_redirects_to_app and ran the test suite; the new test passed with the existing tests.

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Codex Task

[gemini-code-assist]

Code Review

This pull request introduces a redirect from the root path to /app and adds a corresponding test case. The reviewer suggests using a 308 Permanent Redirect instead of a 302 Found status code to allow for browser caching and maintain the request method, along with a necessary update to the test assertion.

[gemini-code-assist]

For a permanent redirect like this, it's better to use a permanent redirect status code. This can improve performance for repeat visitors as browsers can cache the redirect. I suggest using 308 Permanent Redirect.

The 308 status code preserves the request method (GET in this case) and indicates the redirect is permanent. You will also need to update the corresponding test to expect a 308 status code.

Suggested change

	return RedirectResponse("/app", status_code=status.HTTP_302_FOUND)
	return RedirectResponse("/app", status_code=status.HTTP_308_PERMANENT_REDIRECT)

[gemini-code-assist]

To align with the recommended change of using a permanent redirect in app/main.py, this assertion should check for a 308 status code instead of 302.

Suggested change

	assert response.status_code == 302
	assert response.status_code == 308