feat(auth): move JWT blacklist to Redis with TTL [FASE-0.2]

Revoke tokens by jti in a dedicated Redis DB, honor TTL from JWT exp on logout, reject revoked tokens in get_current_user, and add FakeRedis-backed API tests.

backend/tests/conftest.py

@@ -80,12 +80,37 @@ def db():
 
 
 @pytest.fixture(scope="function")
-def client(db):
+def client(db, monkeypatch):
     """Create a test client with database override.
     
     Imports ``app.main`` lazily to avoid pulling in boto3 / APScheduler
     when only the ``db`` fixture is needed.
+
+    MinIO and the background scheduler are no-ops here so tests do not
+    require Docker services for application startup.
+
+    JWT blacklist uses an in-memory FakeRedis so tests do not require a
+    real Redis instance.
     """
+    import fakeredis
+
+    _fake_redis = fakeredis.FakeRedis(decode_responses=True)
+
+    def _blacklist_conn():
+        return _fake_redis
+
+    monkeypatch.setattr(
+        "app.infrastructure.redis_client.get_redis_blacklist",
+        _blacklist_conn,
+    )
+
+    monkeypatch.setattr("app.main.ensure_bucket_exists", lambda: None)
+    monkeypatch.setattr("app.main.start_scheduler", lambda: None)
+    monkeypatch.setattr(
+        "app.main.scheduler.shutdown",
+        lambda wait=False: None,
+    )
+
     from app.main import app
     from app.database import get_db
     import app.database as _db_mod
@@ -118,6 +143,7 @@ def admin_user(db):
         hashed_password=hash_password("admin123"),
         role="admin",
         is_active=True,
+        must_change_password=False,
     )
     db.add(user)
     db.commit()
@@ -134,6 +160,7 @@ def red_tech_user(db):
         hashed_password=hash_password("redtech123"),
         role="red_tech",
         is_active=True,
+        must_change_password=False,
     )
     db.add(user)
     db.commit()
@@ -150,6 +177,7 @@ def blue_tech_user(db):
         hashed_password=hash_password("bluetech123"),
         role="blue_tech",
         is_active=True,
+        must_change_password=False,
     )
     db.add(user)
     db.commit()
@@ -166,6 +194,7 @@ def red_lead_user(db):
         hashed_password=hash_password("redlead123"),
         role="red_lead",
         is_active=True,
+        must_change_password=False,
     )
     db.add(user)
     db.commit()
@@ -182,6 +211,7 @@ def blue_lead_user(db):
         hashed_password=hash_password("bluelead123"),
         role="blue_lead",
         is_active=True,
+        must_change_password=False,
     )
     db.add(user)
     db.commit()

backend/tests/test_auth.py

@@ -79,3 +79,46 @@ def test_get_me_invalid_token(client):
         headers={"Authorization": "Bearer invalidtoken"},
     )
     assert response.status_code == 401
+
+
+def test_logout_revokes_token(client, admin_user):
+    """After logout, the same JWT must be rejected (Redis blacklist).
+
+    Prefer Authorization over the HttpOnly cookie so logout blacklists the
+    same token the client sends on the next request; clear cookies to avoid
+    stale jar state across calls.
+    """
+    login = client.post(
+        "/api/v1/auth/login",
+        data={"username": "admin", "password": "admin123"},
+    )
+    assert login.status_code == 200
+    token = login.json()["access_token"]
+
+    client.cookies.clear()
+    out = client.post(
+        "/api/v1/auth/logout",
+        headers={"Authorization": f"Bearer {token}"},
+    )
+    assert out.status_code == 200
+
+    from jose import jwt
+
+    from app.config import settings
+    from app.infrastructure.redis_client import get_redis_blacklist
+
+    payload = jwt.decode(
+        token, settings.SECRET_KEY, algorithms=[settings.ALGORITHM],
+    )
+    jti = payload.get("jti")
+    assert jti
+    assert get_redis_blacklist().exists(f"blacklist:{jti}")
+
+    client.cookies.clear()
+    assert not len(client.cookies), "cookie jar must be empty to force Authorization Bearer"
+    me = client.get(
+        "/api/v1/auth/me",
+        headers={"Authorization": f"Bearer {token}"},
+    )
+    assert me.status_code == 401
+    assert me.json()["detail"] == "Token has been revoked"