Use shared SESSION_COOKIE_NAME in auth router tests

backend/tests/test_routers/test_auth.py

@@ -8,6 +8,8 @@ from unittest.mock import patch
 import pytest
 from httpx import AsyncClient
 
+from app.utils.constants import SESSION_COOKIE_NAME
+
 # ---------------------------------------------------------------------------
 # Helpers
 # ---------------------------------------------------------------------------
@@ -64,8 +66,8 @@ class TestLogin:
             "/api/auth/login", json={"password": "mysecretpass1"}
         )
         assert response.status_code == 200
-        assert "bangui_session" in response.cookies
-        assert "." in response.cookies["bangui_session"]
+        assert SESSION_COOKIE_NAME in response.cookies
+        assert "." in response.cookies[SESSION_COOKIE_NAME]
         set_cookie = response.headers.get("set-cookie", "")
         assert "HttpOnly" in set_cookie
         assert "SameSite=lax" in set_cookie
@@ -124,7 +126,7 @@ class TestLogout:
         assert response.status_code == 200
         # Cookie should be set to empty / deleted in the Set-Cookie header.
         set_cookie = response.headers.get("set-cookie", "")
-        assert "bangui_session" in set_cookie
+        assert SESSION_COOKIE_NAME in set_cookie
 
     async def test_logout_is_idempotent(self, client: AsyncClient) -> None:
         """Logout succeeds even when called without a session token."""